Operating manual
Ultrasound flow measuring device
UDM 200
Mess- und Ortungstechnik
Measuring and Locating Technologies
Elektrizitätsnetze
Power Networks
Kommunikationsnetze
Communication Networks
Rohrleitungsnetze
Water Networks
Leitungsortung
Line Locating
Issue: 1 (05/2008)
Consultation with SebaKMT
The present system manual has been designed as an operating guide and for reference. It is
meant to answer your questions and solve your problems in as fast and easy a way as
possible. Please start with referring to this manual should any trouble occur.
In doing so, make use of the table of contents and read the relevant paragraph with great
attention. Furthermore, check all terminals and connections of the instruments involved.
Should any question remain unanswered, please contact:
Seba Dynatronic
Mess- und Ortungstechnik GmbH
Hagenuk KMT
Kabelmesstechnik GmbH
Dr.-Herbert-Iann-Str. 6
D - 96148 Baunach
Phone: +49 / 9544 / 68 – 0
Fax: +49 / 9544 / 22 73
Röderaue 41
D - 01471 Radeburg / Dresden
Phone: +49 / 35208 / 84 – 0
Fax: +49 / 35208 / 84 249
E-Mail: sales@sebakmt.com
http://www.sebakmt.com
 SebaKMT
All rights reserved. No part of this handbook may be copied by photographic or other means unless SebaKMT
have before-hand declared their consent in writing. The content of this handbook is subject to change without
notice. SebaKMT cannot be made liable for technical or printing errors or shortcomings of this handbook.
SebaKMT also disclaim all responsibility
for damage resulting directly or indirectly from the delivery, supply, or use of this matter.
3
Terms of Warranty
SebaKMT accept responsibility for a claim under warranty brought forward by a customer for
a product sold by SebaKMT under the terms stated below.
SebaKMT warrant that at the time of delivery SebaKMT products are free from
manufacturing or material defects which might considerably reduce their value or usability.
This warranty does not apply to faults in the software supplied. During the period of warranty,
SebaKMT agree to repair faulty parts or replace them with new parts or parts as new (with
the same usability and life as new parts) according to their choice.
SebaKMT reject all further claims under warranty, in particular those from consequential
damage. Each component and product replaced in accordance with this warranty becomes
the property of SebaKMT.
All warranty claims versus SebaKMT are hereby limited to a period of 12 months from the
date of delivery. Each component supplied by SebaKMT within the context of warranty will
also be covered by this warranty for the remaining period of time but for 90 days at least.
Each measure to remedy a claim under warranty shall exclusively be carried out by
SebaKMT or an authorized service station.
To register a claim under the provisions of this warranty, the customer has to complain about
the defect, in case of an immediately detectable fault within 10 days from the date of delivery.
This warranty does not apply to any fault or damage caused by exposing a product to
conditions not in accordance with this specification, by storing, transporting, or using it
improperly, or having it serviced or installed by a workshop not authorized by SebaKMT. All
responsibility is disclaimed for damage due to wear, will of God, or connection to foreign
components.
For damage resulting from a violation of their duty to repair or re-supply items, SebaKMT can
be made liable only in case of severe negligence or intention. Any liability for slight
negligence is disclaimed.
4
Contents
1
General Details....................................................................................................9
2
Quickstart ..........................................................................................................10
3
Applications ......................................................................................................13
4
Measuring Principle..........................................................................................13
5
Handling of UDM 200 ........................................................................................14
5.1 Control Panel and Handling .......................................................................................... 14
5.2 Display .......................................................................................................................... 15
5.3 Plugs ............................................................................................................................. 15
5.4 Sensors......................................................................................................................... 15
5.5 Battery Indicator............................................................................................................ 15
5.6 Charging the Battery ..................................................................................................... 16
5.7 Battery Care.................................................................................................................. 16
5.8 Cleaning........................................................................................................................ 16
5.9 Maintenance ................................................................................................................. 16
6
Menu Structure Overview.................................................................................17
7
General Measuring Process.............................................................................19
7.1 Selection of the Measuring Point .................................................................................. 19
7.2 Acoustic Penetration ..................................................................................................... 19
7.3 Undisturbed Flow Profile............................................................................................... 20
7.4 Measuring Points to be Avoided ................................................................................... 22
7.5 Input of the Pipe Parameters / Menu PAR.................................................................... 23
7.5.1
7.5.2
7.5.3
7.5.4
7.5.5
Outer Pipe Diameter / Pipe Circumference ..................................................................... 23
Pipe Wall Thickness ........................................................................................................ 23
Pipe Material .................................................................................................................... 24
Pipe Lining ....................................................................................................................... 25
Pipe Roughness .............................................................................................................. 25
7.6 Input of the Medium Parameters................................................................................... 26
7.6.1
7.6.2
7.6.3
7.6.4
7.6.5
Sound Velocity ................................................................................................................. 26
Kinematic Viscosity.......................................................................................................... 26
Density ............................................................................................................................. 27
Medium Temperature ...................................................................................................... 27
Cable Length.................................................................................................................... 27
7.7 Realize Measurement / Menu MEA .............................................................................. 28
7.7.1
7.7.2
Assign a Number to Measuring Point .............................................................................. 28
Define Number of Sound Paths ....................................................................................... 29
7.8 Mounting and Positioning the Transducer .................................................................... 30
7.8.1
7.8.2
7.8.3
7.8.4
Transducer Distance........................................................................................................ 30
Mounting the Transducers ............................................................................................... 31
Mounting the transducers with transducer shoes and chains ......................................... 31
Lengthening the Fastening Chain.................................................................................... 32
5
7.8.5
7.8.6
Fine Adjustment of the Transducer Distance .................................................................. 32
Start of Measurement ...................................................................................................... 33
7.9 Recognition of Flow Direction ....................................................................................... 33
7.10
Stopping of Measurement...................................................................................... 33
8
Displaying the Measured Values / Menu OPT ................................................34
8.1 Selection of the Physical Quantity and of the Unit of Measurement ........................... 34
8.2 Display Setting .............................................................................................................. 35
8.3 Transducer Distance..................................................................................................... 35
8.4 Storage and Output of Measured Data ......................................................................... 36
8.4.1
8.4.2
8.4.3
8.4.4
8.4.5
8.4.6
8.4.7
9
Storing Measured Data.................................................................................................... 36
Output to a PC via Serial Interface .................................................................................. 37
Measured Data Memory during Measurement ................................................................ 37
Offline Output of Measured Values ................................................................................. 37
Saving the Counter .......................................................................................................... 38
Storing the Signal Amplitude ........................................................................................... 38
Storing the Sound Velocity of the Medium ...................................................................... 38
Advanced Measuring Functions......................................................................39
9.1 Command Execution during Measurement................................................................... 39
9.2 Damping Factor ............................................................................................................ 39
9.3 Totalizers ...................................................................................................................... 40
9.3.1
9.3.2
Store the Totalizer Value ................................................................................................. 40
Overflow of the Totalizers ................................................................................................ 40
9.4 Upper Limit of the Flow Velocity ................................................................................... 41
9.5 Cut-off Flow................................................................................................................... 41
9.6 Uncorrected Flow Velocity ............................................................................................ 42
9.7 Change of Limit for the Inner Pipe Diameter................................................................. 43
9.8 Protection code for unwanted interruption .................................................................... 43
9.8.1
9.8.2
Intervention in the Measurement ..................................................................................... 44
Deactivation of a Program Code...................................................................................... 44
9.9 Measuring the Sound Velocity of the Medium .............................................................. 45
9.9.1
Displayed Information ...................................................................................................... 46
10 Output ................................................................................................................47
10.1
10.1.1
10.1.2
10.1.3
10.2
10.3
10.3.1
10.4
10.5
10.5.1
10.5.2
10.5.3
Activation ............................................................................................................... 47
Output Range................................................................................................................... 48
Error Output ..................................................................................................................... 49
Function Test ................................................................................................................... 50
Error Value Delay................................................................................................... 51
Activation of an Analog Output .............................................................................. 52
Measuring Range of the Analog Outputs ........................................................................ 52
Activation of a Pulse Output................................................................................... 53
Activation of an Alarm Output ................................................................................ 53
Alarm Properties .............................................................................................................. 54
Setting the Limits ............................................................................................................. 55
Defining the Hysteresis.................................................................................................... 56
6
10.6
10.6.1
10.6.2
10.6.3
10.6.4
10.6.5
10.6.6
10.7
Behaviour of the Alarm Outputs ............................................................................. 56
Apparent Switching Delay................................................................................................ 56
Reset and Initialization of the Alarms .............................................................................. 56
Storage of Alarm Outputs ................................................................................................ 56
Alarm Outputs during Transducer Positioning................................................................. 56
Alarm Outputs during Measurement................................................................................ 57
Alarm State Indication...................................................................................................... 58
Deactivation of the Outputs.................................................................................... 58
11 Settings and Special Functions/ Menu SF......................................................59
11.1
11.2
11.3
11.3.1
11.3.2
11.3.3
11.3.4
11.3.5
11.4
11.5
11.6
11.7
11.8
11.9
Language Change (HotCode)................................................................................ 59
Time and Date ....................................................................................................... 60
Dialoges and Menus .............................................................................................. 61
Pipe Circumference ......................................................................................................... 61
Measuring Point Number Indication ................................................................................ 62
Display of the lastly entered Transducer Distance .......................................................... 62
Error Value Delay ............................................................................................................ 62
Alarm State Indication...................................................................................................... 62
Measurement Settings ........................................................................................... 63
Configuring Serial Data Transfer ........................................................................... 64
Contrast ................................................................................................................. 64
Instrument Information ........................................................................................... 64
Printing Measured Values...................................................................................... 65
Deleting Measured Values..................................................................................... 65
12 SuperUser Mode ...............................................................................................66
12.1
12.2
Activating/Deactivating........................................................................................... 66
Malfunctions in SuperUser Mode........................................................................... 66
13 Libraries.............................................................................................................67
13.1
13.1.1
13.1.2
13.1.3
13.1.4
13.1.5
13.2
13.2.1
13.2.2
13.2.3
13.2.4
13.2.5
13.2.6
Editing the Selection Lists...................................................................................... 67
Displaying a Selection List............................................................................................... 68
Adding a Material or Medium to the List .......................................................................... 68
Removing a Material or Medium from the List................................................................. 69
Removing all Materials or Media from the List ................................................................ 69
Adding all Materials or Media to the List.......................................................................... 69
Defining New Materials or Media ........................................................................... 70
Partitioning the User Memory .......................................................................................... 70
Extended Library Function............................................................................................... 72
Entering Material or Medium Properties without Using the Extended Library................ 73
Entering Material Properties Using the Extended Library ............................................... 74
Entering Medium Properties Using the Extended Library ............................................... 76
Deleting a User-Defined Material or Medium .................................................................. 77
14 PC Software.......................................................................................................78
14.1
14.2
14.3
Symbols in the Menu Bar....................................................................................... 78
Connecting to the UDM 200................................................................................... 79
Downloading Data.................................................................................................. 80
7
14.4
14.5
Changing the Software Language ......................................................................... 82
Additional Software Options................................................................................... 82
15 Troubleshooting ...............................................................................................83
15.1
15.2
15.3
15.4
15.5
15.6
Problems with the Measurement ........................................................................... 84
Correct Selection of the Measuring Point .............................................................. 85
Maximum Acoustic Contact ................................................................................... 85
Application Specific Problems................................................................................ 86
High Measuring Deviations .................................................................................... 86
Problems with the Totalizers.................................................................................. 87
16 Technical Data ..................................................................................................88
17 Appendix ...........................................................................................................89
17.1
17.2
17.3
17.4
17.5
Serial Output Format.............................................................................................. 89
Hyperterminal Transfer Parameters....................................................................... 90
Sound Velocity of Selected Pipe and Lining Materials at 20 °C............................. 90
Typical Roughness Coefficients of Pipes............................................................... 91
Properties of Water at 1 bar and at Saturation Pressure ....................................... 92
8
1
General Details
The UDM 200 is a high precision measuring tool. Please handle with care. To assure a long life please
pay attention to the following points:
- Read this manual completely and follow all the details.
- Prevent the UDM 200 from crushes and tumbles.
- Keep the transducers clean.
- Don’t bend or squeeze the cables of the transducers.
- Don’t expose the cabels to great heat.
- Don’t use damaged cables.
- Pay attention to the units degree of protection.
- Not at all open the unit on your own authority.
- Connect the battery recharger correctly.
This manual is written for the user of the UDM 200. It contains important information about this unit.
Therefore please read the manual and keep it carefully.
Despite of all care there may be mistakes in it. Please advise us of such failures.
The UDM 200 is subject to continuous improvement. Therefore there may be certain variations
between the manual and the unit. If you have any question, please contact SebaKMT.
We reserve to accomplish technical changes without preceding information.
9
2
Quickstart
You should have the following data down pat, before you begin:
Pipe data:
-
Outer diameter or pipe circumference
Wall thickness (make use of tables of the producer or use a thickness gauge on site)
Material
Surface condition of the pipe (lining, roughness)
Approximate temperature of the medium
By the help of keys
by pressing ENTER.
and
you change the values of the menus. Complete every single action
Set up parameters
Activate UDM 200.
Press the keys till PAR is marked in the Display.
Press ENTER.
Enter the following values below..
Manage the input with keys:
Outer diameter [mm]
Wall thickness [mm]
(make use of tables of the producer or use a thickness gauge on
site)
Material: set the preferred material by the use of key
.
If there is a lining, its material, condition and thickness have to
be entered, too. Therefore please read this manual carefully.
When there is no lining choose “no” and continue by pressing
the “Enter”-key
Roughness of the pipe. Choose the roughness from the table in
the Annex
10
Medium: water
Approximate temperature of the medium.
Additional cable. Leave this value on 0.0m.
Measuring
Select MEA by the help of the arrow keys and press ENTER.
OPTIONAL:
Enter measuring points: enter any comment by the help of the
arrow keys.
Set sound path: Please leave the proposed value, if possible!!!
Transducer distance: Set the distance of the transducers on the
straight edge. Set the transducers on the pipe and fix them,
using their clamping chains. There has to be enough couplant
gel on the transducers. There must not be air between
transducers and pipe.
UDM 200 displays the intensity of the transmitted signal.
Please see that the signal is stable!
Confirm once more the transducer distance.
UDM 200 starts measurement.
11
During measurement
By pressing the keys further values can be displayed:
Total volume and present flow
Reflow and present reflow
Free memory of the unit
Mode: Transient Time
Distance between the transducers set at the moment
S1, Q1 c R F
Quit measurement
Adjust transducers
Clear totalized volume
Flow velocity
12
3
Applications
This UDM 200 can be used wherever both the pipe wall and the medium to be measured are soundpermeable. This applies to pipe walls made of homogeneous material and to media with a low solid or
gas content. Because ultrasonic waves can also penetrate solids, the sensors can be fixed to the
outside of the pipe, which means the measurement requires no intervention. The measurements are
independent of the electrical parameters of the medium such as conductivity and the dielectric
constant.
4
Measuring Principle
The UDM uses ultrasonic signals for the flow measurement of a medium, employing the so-called
transit time method.
Because the medium in which the signals propagate is flowing, the transit time of the sound signals
propagating in the direction of flow is shorter than the transit time of the signal propagating against the
direction of flow.
The transit-time difference t is measured and allows the determination of the average flow velocity on
the propagation path of the ultrasonic signals. A flow profile correction is then performed in order to
obtain the area average of the flow velocity, which is proportional to the volume flow.
13
5
5.1
Handling of UDM 200
Control Panel and Handling
Use the several keys to navigate through the menus of UDM 200.
General functions
BREAK:
Deletes the selection or change and returns to main menu.
RESET: Press these three keys at the same Time to resolve a
malfunction. This reset equals a restart of the unit. Stored data are
not affected.
INIT (cold start): Press these both keys during turn-on procedure to
initialize UDM 200 new. Most of the parameters and settings are
reset to factory defaults. Memory contents are not affected.
ENTER:
Confirms the selection or the input.
Horizontal selection
Selects the nearest point on the right.
Selects the nearest point on the left.
Vertical selection
Scrolls forwards.
Scrolls backwards.
Input of figures and values
Moves the Cursor to the right.
Scrolls through the symbol set.
Move the cursor to the left.
If the cursor is situated on the left side:
- an even treated value will be reset to the previously stored value
- a not treated value will be deleted.
There is an error message, if the entered value is invalid.
Press any key and enter a correct value.
Input of text
Moves the cursor to the right.
Scrolls to the next symbol within the symbol set.
Resets all symbols to the last entry.
14
5.2
Display
UMD 200 is equipped by a display, on which settings and measured values can be seen.
5.3
Plugs
5.4
Sensors
The sensors are engraved on the top. The sensors are correctly installed when the engraved markings
on both sensors together form an arrow. The sensor cables then point in opposite directions.
The arrow allows you to later determine the flow direction in connection with the displayed measured
value.
5.5
Battery Indicator
When the backlighting is switched off, the charge level of the battery is not shown.
Press the
button (On/Off) once, to switch on the backlighting and the battery indicator.
15
5.6
Charging the Battery
The UDM 200 has a state-of-the-art lithium-ion battery. To charge the UDM 200, use the charger unit
supplied.
Switch on the device. The green LED with the power symbol flashes to indicate that the device is
being charged. The green LED lights up constantly when the device is fully charged.
5.7
Battery Care
The UDM 200 has state-of-the-art lithium-ion batteries. This type of battery does not suffer from the
“memory effect”. Over time, however, frequent charging of only partially discharged batteries can lead
to the battery power not being correctly indicated.
To synchronise this, completely discharge the battery (by simply switching the device to test mode)
and then charge it again. Perform this action at least twice. Afterwards, the charge level should be
correctly indicated.
5.8
Cleaning
Use a soft cloth to clean the device. Do not use cleaning agents. Wipe off any residue of contact paste
using a soft paper tissue.
5.9
Maintenance
No maintenance is required. Always observe the instructions and precautions in the manual. If the
UDM 200 is correctly installed at a suitable location in accordance with the recommendations in this
manual, properly used and taken care of, no malfunctions are to be expected.
16
6
Menu Structure Overview
Menu overview
Level 1
Level 2
PAR: Parameter
Pipe and medium settings
Outer diameter
Wall thickness
Pipe material
Material selection
Other material
Lining
Roughness
Medium
Level 3
Level 4 /settings
c-Material
(see addition)
Lining material:
Thickness of lining
Water
Sea water
Other medium
Section
7.5
7.5.1
7.5.2
7.5.3
7.5.3
7.5.4
7.5.4
7.5.5
7.6
c-Medium min
c-Medium max
Kin. viscosity
Density
7.6.1
Medium temperature
Add. Cable
7.6.2
7.6.3
7.6.4
7.6.5
MEA: Measurement
Steps along measuring operation
Measuring point Nr.
Way of sound
Transducer distance
7.7
7.7.1
7.7.2
7.8.5
OPT: Output options
Setting of all relevant output options (measuring quantity,
measuring unit, etc.)
Measuring quantity
Volume flow
Volume in: [select
measuring unit]
Flow velocity
Velocity in: [select
measuring unit]
Mass flow
Mass in: [select
measuring unit]
Sound velocity
Damping
Store measuring data
No/Yes
Serial output No/Yes
Storage rate
Extra: [selection in
seconds]
Every second
Every 10 seconds
Every minute
Every 10 minutes
Every 30 minutes
Every hour
Current loop No/Yes
Measuring quantities Absolut/Sign
Measuring range:
begin
Measuring range: end
8
17
8.1
8.1
8.1
8.1
9.2
8.4.1
8.4.2
10.3
Alarm output No/Yes
R1=Funk
R1= Type
R1= Mode
Select function
Hold
Non-Hold
NC CONT
NO CONT
10.5
Limits
SF: Special Functions
Functions, that are not directly related to measurement
System settings
Set clock
Libraries
Material list
Media list
Format User-Area
Extended library
Dialogs/Menus
Measurement
Process outputs
Storage
Serial transmission
Miscellaneus
Unit-Info
Print
Delete measuring
quantities
Programming-Code
Install. Material
Install. Medium
Pipe circumference
Measuring point
Transducer
distance
Error-val. Delay
Schow relais stat.
Compare c-Fluid
Flow velocity.
Cut-off flow
Velocity Limit
Quant. Wrapping
Quantitiy recall
Install Output
Ringbuffer
Storage mode
Storing measured
data
Store Amplitude
Store c-Medium
Kill Spaces
Decimalpoint
Col-Separat.
Input HotCode
(change language)
Contrast
11.2
13
13
13
13
11.3
11.3.2
11.3.3
11.3.4
11.3.5
9.4
9.5
9.4
9.3.2
9.3.1
10
8.4
8.4.1
0
8.4.6
8.4.7
11.5
11.1
11.6
11.7
11.8
11.9
9.8
13
13
18
7
7.1
General Measuring Process
Selection of the Measuring Point
The correct selection of the measuring point is crucial for achieving reliable measurement results and
a high accuracy. A measurement must take place on a pipe
• where the sound can propagate and
• where a fully developed rotationally symmetrical flow profile exists.
The correct transducer positioning is an essential condition for error-free measurement. It guarantees
that the sound signal will be received under optimum conditions and evaluated correctly.
Because of the variety of applications and the different factors influencing the measurement, there can
be no standard solution for the transducer positioning. The correct position of the transducers will be
influenced by the following factors:
• diameter, material, lining, wall thickness and form of the pipe
• medium
• presence of gas bubbles in the medium
Avoid measuring points in the vicinity of deformations and defects of the pipe and in the vicinity of
weldings.
Avoid locations where deposits are building in the pipe. Make sure that the ambient temperature at the
selected location is within the operating temperature range of the transducers (see annex Technical
Data).
7.2
Acoustic Penetration
It must be possible to penetrate the pipe with acoustic signals at the measuring point. The acoustic
penetration is reached when pipe and medium do not attenuate the sound signal so strongly that it is
completely absorbed before reaching the second transducer. The attenuation of pipe and medium
depends on:
• kinematic viscosity of the medium
• proportion of gas bubbles and solids in the medium
• deposits on the inner pipe wall
• pipe material
The following conditions have to be respected at the measuring point:
• the pipe is always filled completely
• no solid deposits are building
• no bubbles accumulate (even bubble-free media can form gas pockets when the medium expands,
e.g. before pumps and after great cross-section extensions)
19
7.3
Undisturbed Flow Profile
Many flow elements (elbows, slide valves, valves, control valves, pumps, reducers, diffusers, etc.)
cause a distortion of the flow profile. The axisymmetrical flow profile needed for correct measurement
is no longer given. A careful selection of the measuring point helps to reduce the impact of disturbance
sources.
It is most important that the measuring point is chosen at a sufficient distance from any
disturbance source. Only then it can be assumed that the flow profile in the pipe is fully
developed.
However, UDM-200 will give you significant measuring results even under non-ideal measuring
conditions if:
• e.g. a medium contains a certain proportion of gas bubbles or solids or
• the recommended distances to disturbance sources can not be observed for practical reasons.
Recommended straight inlet and outlet pipe lengths are given for different types of flow disturbance
sources in the examples in the table below.
Correct selection of a measuring point:
Disturbance source: 90°-bend
Inlet
L ≥ 10 D
Outlet
L≥5D
Disturbance source: 2 x 90°- bend on the same level
Inlet
Outlet
L ≥ 25 D
L≥5D
Disturbance source: 2 x 90°- bend on various levels
Inlet
Outlet
L ≥ 40 D
L≥5D
20
Disturbance source: T-fitting
Inlet
L ≥ 50 D
Outlet
L ≥ 10 D
Disturbance source: Widening
Inlet
L ≥ 30 D
Outlet
L≥5D
Disturbance source: Constriction
Inlet
L ≥ 10 D
Outlet
L≥5D
Disturbance source: Valve
Inlet
L ≥ 40 D
Outlet
L ≥ 10 D
Disturbance source: Pump
Inlet
L ≥ 50 D
21
7.4
Measuring Points to be Avoided
Try to avoid the following measuring points:
• near deformed or damaged pipe sections
• near welding seams
• where deposits are bonded within the pipe
Observe the instructions contained in the following table:
Horizontal pipeline:
Select a measuring point where the transducers can be mounted on the side of the pipe, so that
the sound waves propagate horizontally in the pipe. Thus, solids deposited on the bottom of the
pipe and the gas pockets developing at the top will not influence the propagation of the signal.
right
wrong
Free In- or Outlet:
Locate the measuring point, where the pipe cannot drain.
right
unfavourable
right
unfavourable
Vertical pipeline:
Locate the measuring point, where fluid rises. The pipe has to be completely filled.
right
wrong
22
7.5
Input of the Pipe Parameters / Menu PAR
After the measuring point has been selected, the pipe and medium parameters can be entered.
The ranges are limited by the characteristics of the transducers and of the flowmeter. An error
message will be displayed if the limits are exceeded (MINIMUM and MAXIMUM plausibility check).
Note:
The parameters will be stored only
PARAMETER is finished completely once.
if
the
program
branch
Select the program branch PARAMETER.
Press ENTER.
7.5.1 Outer Pipe Diameter / Pipe Circumference
Enter the outer pipe diameter.
Press ENTER.
If the entered outer diameter is > 1000 mm, no
reflection measurement can be performed.
It is possible to enter the pipe circumference instead of the outer pipe diameter. The setting is cold
start resistant. It will be activated in the program branch SPECIAL FUNCTION.
If the input of the pipe circumference has been activated and 0 (zero) is entered for the OUTER
DIAMETER, the menu item PIPE CIRCUMFER. will be displayed automatically. If the pipe
circumference is not to be entered, press key BRK to return to the main menu and start the parameter
input again.
7.5.2 Pipe Wall Thickness
Enter the pipe wall thickness. The range depends on
the connected transducers. Default is 3.0 mm.
Press ENTER.
To get the wall thickness refer to the data sheet of the pipe manufacturer or use a device to measure
the wall thickness like the UWD 200.
Note:
The inner diameter (= outer diameter - 2x pipe wall thickness)
will be calculated internally. If the value is not within the
inner pipe diameter range of the connected transducers, an error
message will be displayed. It is possible to change the lower
limit of the inner pipe diameter for a given transducer type (see
section 9.7).
23
7.5.3 Pipe Material
The pipe material has to be selected to determine the sound velocity. The sound velocities for the
materials in the scroll list are stored in the device. After the pipe material has been selected, the
UDM 200 automatically selects the appropriate sound velocity.
Select the pipe material from the scroll list.
If the material is not in the scroll list, select
OTHER MATERIAL.
Press ENTER.
Note:
One can configure which materials are available in the selection
lists (see section 13.1)
If OTHER MATERIAL is selected, the sound velocity has
to be entered.
Enter the sound velocity of the pipe material. Values
between 600.0 m/s and 6553.5 m/s will be accepted.
Press ENTER.
(For the sound velocity of some materials see the
annex)
Note:
Enter the sound velocity of the material (i.e. longitudinal or
transversal velocity) which is nearer to 2500 m/s.
24
7.5.4 Pipe Lining
If the pipe has an inner lining, select YES.
Press ENTER.
If NO is selected, the next parameter will be displayed.
Select the medium from the scroll list. If the material is
not in the scroll list, select OTHER MATERIAL.
Press ENTER.
Note:
One can configure which materials are available in the selection
lists (see section 13.1).
If OTHER MATERIAL is selected, the sound velocity has to be
entered.
Enter the sound velocity of the pipe material. Values between
600.0 m/s and 6553.5 m/s will be accepted. Press ENTER.
(For the sound velocity of some materials see the annex)
Enter the thickness of the liner. Default is 3.0 mm.
Press ENTER.
Note:
The inner diameter (= outer diameter - 2x pipe wall thickness 2x liner thickness) will be calculated internally. If the value
is not within the inner pipe diameter range of the connected
transducers, an error message will be displayed.
7.5.5 Pipe Roughness
The flow profile of the medium is influenced by the roughness of the inner pipe wall. The roughness
will be used for the calculation of the profile correction factors. As the pipe roughness can not be
exactly determined in most cases, it has to be estimated. For the roughness of some materials see the
annex. The values are based on experience and measurements.
Enter the roughness for the selected pipe or lining material.
Values between 0.0 mm and 5.0 mm will be accepted.
Default is 0.1 mm.
Press ENTER.
25
7.6
Input of the Medium Parameters
After the pipe parameters have been entered, the UDM 200 asks for the medium parameters.
Since the UDM 200 is designed to fit to the needs of water suppliers, only water and seawater are
available as predefined mediums. But other mediums can be also measured be selecting OTHER
MEDIUM. In this case, the following parameters have to be entered:
•
•
•
•
min. and max. sound velocity,
kinematic viscosity of the medium,
density of the medium (only if the output option MASS FLOW is activated)
temperature of the medium
Select the medium from the scroll list.If the medium is
not in the scroll list, select OTHER MEDIUM.
Press ENTER.
If a medium is selected from the scroll list, the menu item for the input of the medium temperature will
be displayed directly.
If OTHER MEDIUM. has been selected, the parameters listed above have to be entered first.
Note:
One can configure which materials are available in the selection
lists (see section 13.1).
7.6.1 Sound Velocity
The sound velocity of the medium is used for the calculation of the transducer distance at the
beginning of the measurement. However, the sound velocity does not influence the measuring result
directly. Often, the exact value of the sound velocity for a given medium is unknown. A range of
possible values for the sound velocity must therefore be entered.
Enter the min. and max. sound velocity of the medium.
Values between 800.0 m/s and 3500.0 m/s will be
accepted.
Press ENTER after each input.
7.6.2 Kinematic Viscosity
The kinematic viscosity influences the flow profile of the medium. UDM 200 uses the entered value of
the kinematic viscosity as well as further parameters for a profile correction.
Enter the kinematic viscosity of the medium. Values
between 0.01 mm2/s and 30 000.00 mm2/s will be
accepted.
Press ENTER.
26
7.6.3 Density
The density of the medium has to be entered. The mass flow will be calculated on the basis of the
density (product of volume flow and density).
Note:
If the mass flow is not measured, press ENTER.
Other measuring results will not be influenced.
Enter the operating density of the medium.
Values between 0.10 g/cm3 and 20.00 g/cm3 will be
accepted.
Press ENTER.
7.6.4 Medium Temperature
UDM 200 uses the medium temperature to calculate the distance between the transducers
(recommended distance at begin of measurement).
Enter the medium temperature. The value must be
within the operating temperature range of the
transducers.
Default is 20 °C. Press ENTER..
Note:
The range of possible medium temperatures
operating range of the chosen transducers.
depends
on
the
7.6.5 Cable Length
If the transducer cable has to be extended, enter the
additional cable length (not the entire cable length).
Press ENTER.
The sensors of the UDM 200 are already equipped with
5m cables If you don’t use an additional cable
extension, leave this value on 0.
27
7.7
Realize Measurement / Menu MEA
Select program branch MEASURING in the main menu.
Press ENTER.
If this error message is displayed, please enter the
missing parameters in program branch PARAMETER.
Parameter
!
7.7.1 Assign a Number to Measuring Point
At first you can assign a number and a comment to the measuring point.
Enter values by using the keys
.
28
7.7.2 Define Number of Sound Paths
The sound path is the number of the transits of the ultrasonic waves through the medium in the pipe. A
sound path number of "0" makes no sense.
At an odd number of transits (diagonal mode), the transducers will be mounted on opposite sides of
the pipe (see figure below).
At an even number of transits (reflection mode), the transducers will be mounted on the same sides of
the pipe (see figure below).
An increased number of transits mean increased accuracy of the measurement. However, the
increased transit distance leads to a higher attenuation of the signal. The reflections on the opposite
pipe wall and deposits on the inner pipe wall cause additional amplitude losses of the sound signal .If
the signal is attenuated strongly by the medium, the pipe, deposits, etc., the number of sound paths
has to be set to 1 if necessary.
Arrangement of the transducers in diagonal
mode
Number of sound
paths
Sound path
Arrangement of the transducers in reflection mode
Number of
sound paths
1
2
3
4
Sound path
and so on
Note:
Correct positioning of the transducer is easier
number of transit paths than for an odd number.
for
an
even
A value for the number of sound paths corresponding to the connected transducers and the entered
parameters will be recommended.
Change the value if necessary.
Press ENTER.
29
7.8
Mounting and Positioning the Transducer
7.8.1 Transducer Distance
A value for the transducer distance will be recommended.
The transducer distance given here is the distance between the
inner edges of the transducer. A negative transducer distance
is possible for a measurement in diagonal mode on very small
pipes, how the following illustration shows:
REFLEC - reflection mode
DIAGON - diagonal mode
Note:
The accuracy of the recommended transducer distance depends on
the accuracy of the pipe and medium parameters entered.
30
7.8.2 Mounting the Transducers
Fasten the transducers the way that the engravings
form an arrow.
• Rust, paint or other deposits on the pipe will absorb the sound
signal. Clean the pipe at the transducer positions. Remove rust or
loose paint. An existing paint layer on the pipe should be sanded for
a better measuring result.
Note:
• Use coupling foil or apply a bead of acoustic coupling compound along
the center line onto the contact surface of the transducer.
• There should be no air pockets between transducer contact surface and
pipe wall.
7.8.3 Mounting the transducers with transducer shoes and chains
• Plug the sensors into the connector shoes. Turn the screw on the top of the connector shoe by 90°
so that the end of it latches into the groove of the sensor and holds it in place.
• Push the guide rule into the side slot on the rails. Align the sensor distance as recommended for
the UDM 200 and block the sensors using the small plastic screws on sensor cable side of the
connector shoes.
-60
0 mm10
20
30
0
50
60
70
80
90
10
110
120
320
330
• Place the connector shoe and guide rule at the test point on the pipe.
• Push the last ball of the chain into the slot on the top of the connector shoe.
• Pay the chain around the pipe (if the chain is not long enough, see the next section).
Note:
If the sensors were fastened to a vertical pipe and the UDM 200 is
lower than the pipe, we recommend laying the cable of the upper sensor
below the tensioning belt to protect it from mechanical strain.
• Tighten the chain and insert it into the second slot in the connector shoe.
• Fasten the other sensor in the same way.
31
7.8.4 Lengthening the Fastening Chain
To lengthen the chain, push the last ball of the extension into the clamp on the ball chain. The spare
clamps supplied with the chain can be used for repairing a broken chain.
7.8.5 Fine Adjustment of the Transducer Distance
If the transducers are armed, press ENTER to confirm
the transducer distance. The measuring operation is
started.
A bar graph S= displays the amplitude of the received
signal.
Shift the transducer slightly until the bar graph has max.
length and is also stable.
By scrolling with key
key
•
•
•
•
through the upper line and with
through the lower line
transducer distance
bar graph Q= (signal quality)
transit time TRANS. in microseconds
bar graph S= (signal amplitude)
can be displayed.
If the signal quality is not sufficient for measurement,
Q=UNDEF will be displayed.
After the precise positioning of the transducers, the
recommended transducer distance is displayed again.
Enter the actual (precise) transducer distance and
press ENTER or simply confirm the displayed value by
pressing ENTER.
Note:
The UDM 200 is able
transducer distance.
to
32
display
the
latest
entered
precise
7.8.6 Start of Measurement
As soon as the precise transducer distance has been entered, the measuring process starts
automatically.
You can return to the bar graph by pressing ENTER.
The results are displayed according to the actually selected output options (see chapter 8). By default
the volume flow in m3/h is displayed. The selection of the values to be displayed and the setting of the
output options are described in chapter 8. Advanced measuring functions are described in chapter 9.
7.9
Recognition of Flow Direction
The flow direction in the pipe can be recognized with the help of the displayed volume
flow in conjunction with the arrow engraved on the transducers:
The medium flows in arrow direction if the displayed volume flow is positive (e.g. 54.5 m3/h).
The medium flows against the arrow direction if the displayed volume flow is negative (e.g. -54.5 m3/h).
7.10 Stopping of Measurement
The measurement can be interrupted at any time by pressing key BRK.
Attention!
Be careful not to interrupt a current measurement by inadvertently
pressing key BRK!
33
8
Displaying the Measured Values / Menu OPT
The physical quantity will be set in the program branch OUTPUT OPTIONS (see section 8.1).
The designation of the physical quantity will be displayed normally in the upper line, its value in the
lower line. The display can be adapted according to your needs.
8.1
Selection of the Physical Quantity and of the
Unit of Measurement
The following physical quantities can be measured:
• flow velocity
• volume flow
• mass flow
For the sound velocity measurement, no unit has to be selected.
The flow velocity is directly measured. The volume flow will be calculated by multiplying the flow
velocity by the cross-section of the pipe. The mass flow will be calculated by multiplying the volume
flow by the density of the medium
Select the program branch OUTPUT OPTIONS.
Select the required physical quantity in the scroll list.
Press ENTER.
For the selected physical quantity, a scroll list with the
available units of measurement is displayed. The
previously selected unit of measurement is displayed
first.
Select the unit of measurement for the selected
physical quantity. Press ENTER.
You can return to the main menu by pressing key BRK. The further menu items of the program branch
OUTPUT OPTIONS are for the activation of the measured value output.
34
8.2
Display Setting
During measurement, the display can be set as to display two measured values simultaneously (one
in each line of the display (standard settings)). The display can be adapted to your requirements. The
modification does not influence the current measurement.
The following information can be displayed in the upper line:
•
•
•
•
•
•
designation of the actually measured and stored physical quantity
totalizer values (if activated)
date and point in time, when the memory will be full
measuring mode
transducer distance (see the following section)
alarm state indication, if activated (see chapter 10) and if alarm outputs are activated
The following information can be displayed in the lower line:
• flow velocity
• mass flow
• volume flow
The display in the upper line can be changed during measurement with key
.
The display in the lower line can be changed during measurement with key
.
The character “*” indicates that the displayed value
(here: flow velocity) is not the selected physical quantity
(here: volume flow).
8.3
Transducer Distance
By pressing key
it is possible during measurement
to scroll to the display of the transducer distance.
The current optimum transducer distance is displayed in
parentheses (here: 51.2 mm), followed by the entered
transducer distance (here: 50.8 mm).
The optimum transducer distance might change during
measurement (e.g. due to temperature fluctuations).
A possible deviation from the optimum transducer
distance (here: -0.4 mm) will be compensated internally.
Attention!
Never change the transducer distance during measurement!
35
8.4
Storage and Output of Measured Data
The following data can be stored or transmitted to a PC during a measurement:
• Date
• Time
• Measuring point number
• Pipe parameters
• Medium parameters
• Transducer parameters
• Sound path (reflection or diagonal)
• Transducer distance
• Damping value
• Storage rate
• Measurand
• Unit
• Measured values
The stored data can be transmitted to a PC at a later point in time (offline output).
Note:
The UDM 200 can store up to 100 series of measured values. The
number of measured values that can be generated depends on the
total number of values stored in the previous series.
If all the values stored in the device are deleted and a new test
is started with only one parameter +on a test channel without
mass storage, up to 27,000 readings can be stored in this new
series.
8.4.1 Storing Measured Data
During the selection of the output options (OUTPUT OPTIONS branch), it can be specified whether or
not and in which rate, the measured data shall be stored during the measurement.
Select Yes to activate the storage of measured data.
Press ENTER.
Select a storage rate. If the required storage rate is
not available, select EXTRA and specify a custom
storage rate between 1 and 43200 (12 hours) seconds.
Press ENTER.
36
8.4.2 Output to a PC via Serial Interface
In order to activate the direct transmission of the measured data to a PC (connected via serial
interface), select the branch SPECIAL FUNCTION \ SYSTEM SETTINGS \ STORING and press
ENTER.
Select YES to activate the serial output to the PC.
Press ENTER.
If no storage rate is selected, the standard rate or the
last selected rate is used.
Select a storage rate. If the required storage rate is
not available, select EXTRA and specify a custom
storage rate between 1 and 43200 seconds (12 hours).
Press ENTER.
Note:
To send the data directly to the PC, open a terminal program
(e.g. Windows Hyperterminal). Set the following connection
parameters: baud rate 9600, data bits: 8, stop bits: 2, parity:
even, flow control: hardware. Open the connection before you
continue on the UDM 200
8.4.3 Measured Data Memory during Measurement
When testing with the activated memory function, a message appears as soon as the memory is
full. Press ENTER to acknowledge the message. The main menu is displayed.
Note:
The UDM 200 interrupts the measurement as soon as the internal
memory is full if no output option other than saving was
selected.
If another output option (e.g. serial output) was selected, the
UDM 200 continues the measurement. Only the saving of measured
data is stopped. The error display appears at regular intervals.
To delete the memory, go to the Special functions menu.
8.4.4 Offline Output of Measured Values
With offline output, the measured values in the memory are output. The data can then be
transferred:
-
To a printer connected to the serial interface of the UDM 200
To a terminal program (e.g. Windows Hyperterminal)
To a special program that displays the data of the UDM 200
37
8.4.5 Saving the Counter
It is possible to only save the value of the displayed counter, or a value for each flow direction. This
setting is not affected by cold starts. Select the option Quantity Storage under
SPECIAL FUNCTION \ SYSTEM SETTINGS \ STORING.
If you select ONE, the UDM 200 only saves the displayed counter. If you select BOTH, the counters of
both flow directions are saved. Press ENTER to confirm.
Note:
The UDM 200 only saves the counter if it is activated and the
data storage function is enabled. Storing a counter reduces the
total number of measured values that can be saved by about two
thirds.
Example: In the SPECIAL FUNCTION menu, the UDM 200 shows that 10,000 more measured
values can be saved. If the counters are activated and only once counter is saved, 3,333 data fields
are available. If both counters are saved, 2,000 data saving operations can be performed.
8.4.6 Storing the Signal Amplitude
Select the option Store Amplitude under the branch
SPECIAL FUNCTION \ SYSTEM SETTINGS \ STORING.
Select ON, if you want the signal amplitude to be
stored in addition to the measured data.
Press ENTER.
8.4.7 Storing the Sound Velocity of the Medium
Select the option c-Medium under the branch SPECIAL FUNCTION \ SYSTEM SETTINGS \
STORING.
Select ON, if you want the sound velocity to be stored
in addition to the measured data.
Press ENTER.
38
9
9.1
Advanced Measuring Functions
Command Execution during Measurement
Commands executable during a measurement are shown in the upper line. A command always begins
until the needed command is displayed. Press ENTER.
with " ". Scroll in the upper line with key
Depending on the instrumentation a program code might be needed.
The following commands are available:
COMMAND
EXPLANATION
ADJUST TRANSDUCERS
Switch over to the operation mode transducer positioning. If a
program code is active, the current measurement will be
automatically continued 8 seconds after the last keyboard entry.
CLEAR TOTALIZER
The totalizers will be reset to zero.
BREAK MEASURE
9.2
Stop measuring and return to main menu. If a program code is
active, at first the six-figure BREAK-CODE has to be entered
Damping Factor
Each displayed measured value is the floating average of all measured values of the last x seconds,
where x is the damping factor. A damping factor of 1 s means that the measured values are not
averaged as the measuring rate is approx 1/s. The default value of 10 s is appropriate for normal flow
conditions. Strongly fluctuating values caused by high flow dynamics require a larger damping factor.
Select the program branch OUTPUT OPTIONS. Press ENTER until the menu item DAMPING is
displayed.
Enter the damping factor.
Values between 1 s and 100 s will be accepted.
Press ENTER.
You can return to the main menu by pressing key BRK.
39
9.3
Totalizers
Total volume or mass of the medium at the measuring point can be determined.
•
There are two totalizers, one for the positive flow direction, one for the negative flow direction.
•
The unit of measurement used for totalization corresponds to the volume or mass unit
selected for the physical quantity (see section 8.1).
•
The value of a totalizer consists of max. 11 digits, including max. 3 decimal places.
Scroll in the upper line with key
to display the
totalizers.
Press ENTER while a totalizer is displayed to toggle
between the display of the totalizers for both flow
directions.
Select the command CLEAR TOTALIZER in the upper line to reset the totalizers to zero.
Press ENTER.
Note:
Flow velocities cannot be totalized.
9.3.1 Store the Totalizer Value
The behavior of the totalizers after an interruption of the measurement or after a RESET of the
flowmeter will be set in SPECIAL FUNCTION \ SYSTEM SETTINGS \ MEASURING. The setting is
cold start resistant.
Select option QUANTITY RECALL in the list
MEASURING.
If you select ON, the values of the totalizers will be
stored and used for the next measurement If you select
OFF, the totalizers will be reset to zero.
9.3.2 Overflow of the Totalizers
There are two different modes the totalizers can work in:
• Without overflow: The value of the totalizer increases to the internal limit of 1038.
The values will be displayed as exponential numbers (±1.00000E10), if necessary.
The totalizer can only be reset to zero manually.
• With overflow: The totalizer will be reset to zero automatically as soon as ±9999999999 is
reached.
Independently of the selected list item, the totalizers can be reset manually to zero.
The totalizer mode will be set in SPECIAL FUNCTION \ SYSTEM SETTINGS \ MEASURING.
The setting is cold start resistant.
Select the menu item QUANT. WRAPPING.
Select ON to work with overflow.
Select OFF to work without overflow.
Note:
•
•
The output of the sum of both totalizers (the throughput Q) via
an output will not be valid anymore after the first overflow
(wrapping) of one of the respective totalizers.
To signalize the overflow of a totalizer, an alarm output with
the switching condition QUANTITY and the type HOLD has to be
activated.
40
9.4
Upper Limit of the Flow Velocity
Single outliers caused by heavily disturbed surroundings can appear in the measured values of the
flow velocity. If outliers are not ignored, they will affect all derived physical quantities, which will then
be unsuitable for integration (e.g. pulse outputs).
It is possible to ignore all measured flow velocities higher than a preset upper limit. These measured
values will be marked as outliers.
The upper limit of the flow velocity will be set in SPECIAL FUNCTION \ SYSTEM SETTINGS \
MEASURING. The setting is cold start resistant.
Select the menu item VELOCITY LIMIT.
Enter the upper limit of the flow velocity Values between
0,1 und 25,5 m/s will be accepted.
Enter “0” (zero) to switch off the velocity control.
Press ENTER
If the control is switched on (upper limit > 0.0 m/s), every measured flow velocity willl be compared to
the entered upper limit. If the flow velocity is higher than the upper limit,
• the flow velocity will be marked as “invalid”!. The physical quantity can not be determined.
• "!" will be displayed after the unit of measurement. (In case of a normal error, "?" will
be displayed.)
Attention!
9.5
If the upper limit is too low, a measurement might be impossible,
as most of the measured values will be marked "invalid".
Cut-off Flow
The cut-off flow function automatically sets all measured flow velocities to zero that are below a preset
value. All values derived from this measured value will be also set to zero.
The cut-off flow can depend on the flow direction or not. The default is 5 cm/s. The max. value is
12.7 cm/s. The cut-off value will be set in SPECIAL FUNCTION \ SYSTEM SETTINGS \
MEASURING. The setting is cold start resistant.
Select ABSOLUTE to define a cut-off flow independent
of the flow direction. There is only one limit to be set.
The absolute value of the measured value will be
compared to the cut-off flow.
Select SIGN to define a cut-off flow dependent on the
flow direction. There are two independent limits to be
set for the positive and negative flow directions.
Select FACTORY to use the default value of 5 cm/s for
the cut-off flow.
Select USER to enter the cut-off flow yourself.
Press ENTER.
If you selected CUT-OFF FLOW\SIGN before, two cut-off flow values have to be entered:
Enter the cut-off flow for positive measured values.
If a positive value is less than this limit, the flow velocity
will be set to zero. All derived values will be set to zero,
too.
Enter the cut-off flow for negative measured values.
If a negative value is greater than this limit, the flow
velocity will be set to zero. All derived values will be set
to zero, too.
41
If you selected CUT-OFF FLOW \ ABSOLUTE before, only one value has to be entered.
The limit will be compared to the absolute value of the
measured flow velocity.
9.6
Uncorrected Flow Velocity
For certain applications, the knowledge of the uncorrected flow velocity might be of interest. Select the
option Quantity Storage under the branch SPECIAL FUNCTION \ SYSTEM SETTINGS \
MEASURING in order to activate / deactivate the flow velocity correction. The setting is cold start
resistant.
Select Normal for corrected flow velocity and select
Uncorr. for uncorrected flow velocity.
Press ENTER.
Henceforth, the UDM 200 asks whether or not the
profile correction shall be enabled before a
measurement is started.
If you select NO, correction is completely deactivated.
All measuring factors are calculated with the
uncorrected flow velocity. To make this clear, the
names of the factors are shown in capital letters.
If you select YES, the UDM 200 only uses the
uncorrected flow velocity if the FLOW VELOCITY factors
was selected in the OUTPUT OPTIONS. The UDM 200
calculates all the other factors (volume flow, mass flow,
etc.) using the corrected flow velocity. During the
measurement, FLOW VELOCITY is shown in capital
letters to indicate that the displayed flow velocity is not
corrected.
Press ENTER to confirm.
However, in both cases, the corrected flow velocity can
be displayed. Scroll to the second line in the display
(
button) until you see the flow velocity. The
uncorrected flow velocity is marked with a “U”.
42
9.7
Change of Limit for the Inner Pipe Diameter
It is possible to modify the lower limit of the inner pipe diameter for a certain transducer type. The
setting is cold start resistant.
Enter HotCode 071001.
Enter the lower limit of the inner pipe diameter for the
different transducer types. Values between 3 mm and
63 mm will be accepted.
Press ENTER to confirm every single value.
9.8
Protection code for unwanted interruption
A current measurement can be protected from an inadvertent intervention by a program code.
If a program code was defined, it will be requested as soon as there is an intervention in the
measurement (a command or key BRK.)
If a program code is active, the message PROGRAM CODE ACTIVE will be displayed when a key is
pressed. This advice disappears after several seconds.
To start a command, it is sufficient to enter the first three digits of the program code (= ACCESS code).
To interrupt a current measurement, the complete program code has to be entered (= BREAK code).
Attention!
Do not forget the program code!
Select in the program branch SPECIAL FUNCTION
the menu item SET PROGRAM CODE.
Enter a program code with max. 6 digits.
Press ENTER.
An error message will be displayed if a reserved
number has been entered (e.g. a HotCode for
language selection).
A program code remains valid as long as:
• no other valid program code is entered or
• the program code is not deactivated.
43
9.8.1 Intervention in the Measurement
If a program code was defined, the UDM 200 asks for this code as soon as someone tries to interrupt
a running measurement.
Enter the program code (as necessary ACCESS- or
BREAK-Code) with the keys
and
.
You can break up the program code input and return
to measurement by pressing key “C”.
At first 000000 will be displayed. If the program code
starts with 000, ENTER can be pressed directly.
If the entered program code is not valid, a failure
notice will be displayed for a few seconds.
If the entered program code is valid, the according
command will be accomplished or the measurement
will be interrupted.
9.8.2 Deactivation of a Program Code
Select in the program branch SPECIAL FUNCTION
the menu item PROGRAM CODE.
The program code will be deleted by entering
“------”.
Press ENTER.
Important note:
If the character “-“ is entered less than six times, this
character string will be used as new program code.
44
9.9
Measuring the Sound Velocity of the Medium
Select OUTPUT OPTIONS in the main menu.
Select the sound velocity as the measuring factor.
Press ENTER to confirm.
This selection closes OUTPUT OPTIONS, because there can be no output of measured values during
the sound velocity measurement.
To start the sound velocity measurement, select MEASUREMENT.
Enter an estimated sound velocity for the medium.
Values between 800 and 3500 m/s are accepted.
Press ENTER to confirm.
Select YES to perform a reflection measurement, or NO
to perform a diagonal measurement. Generally, it is
easier to position the sensors correctly for a reflection
measurement than for a diagonal measurement.
Fasten the sensors to the pipe. Make sure the sensor
distance is as recommended.
Press ENTER to confirm.
(The UDM 200 calculates this sensor distance from the
estimated sound velocity and the current parameters.)
The signal amplitude is shown on the bar chart. Move the sensors relative to each other, until the bars
start getting smaller. Find and adjust the maximum signal amplitude at the shortest possible sensor
distance.
Press ENTER to finish positioning the sensors.
Note:
Do not move the sensors any more.
Measure the current (exact) sensor distance and enter it.
In this example the sensor distance is 25.5 mm.
Press ENTER to confirm.
45
An error message may now appear, stating that the estimated value is too high or too low. In both
cases, the estimated sound velocity you entered deviates too far from the actual sound velocity. The
sensors were positioned on an false signal or an echo.
Press ENTER to acknowledge the error message. Enter a new estimated sound velocity.
The measurement starts as soon as you have entered
an estimated value comparable to the actual sound
velocity of the medium.
9.9.1 Displayed Information
Press the
and
buttons to see more information in the top or bottom line of the display.
Current sensor distance (L):
The distance entered for the last positioning of the sensors. This value is used for
calculating the sound velocity.
Improved distance (L*):
The sensor distance calculated from the measured sound velocity.
This distance enables you to identify incorrect positioning. However, do not alter the sensor
distance!
Signal propagation display (t):
The signal propagation delay in the medium can be
displayed in the top line.
Press ENTER to finish the current measurement.
You can now repeat the positioning of the sensors.
The UDM 200 asks if you want to determine the correct sensor distance again. Select NO if the sound
velocity of the medium was precisely measured (sensor positioning error |L*-L | less than 1 mm).
Select YES if the difference between the current sensor distance and the “improved” distance is more
than 1 mm or if the signal was not detected. A new measurement is started.
You can repeat the measurement as often as you want. In most cases, however, one or two
measurements are enough to determine the sound velocity.
Select YES so save the measured sound velocity in the
current parameter record.
You can edit the measured sound velocity before
saving it.
Press ENTER to confirm.
The name of the medium in the parameter record is
changed to OTHER MEDIUM.
46
10 Output
The UDM 200 is equipped with outputs, which have to be installed and activated before they can be
used.
It takes two steps to install an output:
• defining the physical quantity (source item) to be transmitted to the output by the source channel
and the properties of the signal
• defining the behavior of the output in case no valid measured values are available
After that the installed output has to be activated (program branch Output Options).
10.1 Activation
The outputs will be activated in the program branch SPECIAL FUNCTION \ SYSTEM SETTINGS \
PROC. OUTPUTS.
Note:
The configuration of an output will be stored at the end of the
dialog.
If the dialog is left by pressing key BRK, the changes will not be
stored.
Select in SPECIAL FUNCTION \ SYSTEM SETTINGS
the list item PROC. OUTPUTS.
Press ENTER.
Select the output to be installed. The scroll list contains
all actually available outputs.
A tick after a list item indicates that this output has
already been installed.
Press ENTER.
This display is indicated if the output has not been
installed yet. Select YES.
Press ENTER.
If the output is already installed, select NO to
reconfigure it or YES to return to the previous menu
item to select another output.
Press ENTER.
Select the physical quantity (source item) to be
transmitted from the source channel to the output.
The available source items and the according
configuration options are summarized in the following
table. If a binary output is configured, only the list items
LIMIT and IMPULS will be displayed.
47
Table: Configuration options of the outputs
available
configuration options
source item
output
Measuring value actual measur
flow
heat flow
physical quantity selected in the program
branch OUTPUT OPTIONS
Quantity
Q+
totalizer for the positive flow direction
Q-
totalizer for the negative flow direction
ΣQ
sum of the totalizers (positive and
negative flow direction)
R1
limit message (alarm output R1)
R2
limit message (alarm output R2)
R3
limit message (alarm output R3)
from abs (x)
pulse without sign consideration
from x > 0
pulse for positive measured values
from x < 0
pulse for negative measured values
c-Medium
sound velocity of the medium
Signal
signal amplitude of a measuring channel
Limit
Impuls
Miscellaneous
10.1.1
Output Range
When configuring an analog output, the output range
will be defined now. Select a list item or OTHER RANGE
to enter the output range manually.
If OTHER RANGE.. is selected, enter the values
OUTPUT MIN and OUTPUT MAX.
Press ENTER after each input.
This error message will be displayed if the output range
is not min. 10 % of the max. output range. The next
possible value will be displayed. Repeat the input.
Example: IMAX - IMIN
current output
48
2 mA for a 4…20 mA
10.1.2
Error Output
In the further dialog, an error value can be defined which is to be output if the source item can not be
measured e.g. when gas bubbles are in the medium.
Table: Error Output Options
error output option
MINIMUM
result
output of the lower limit of the output range
LAST VALUE
output of the last measured value
MAXIMUM
output of the upper limit of the output range
OTHER VALUE
The value has to be entered manually. It has to be within the limits of the
output
Example: The volume flow has been selected as source item for a current output, the output range is
4...20 mA, the error value delay td > 0.
The volume flow can not be measured in the
time interval t0...t1.
Which signal shall be displayed during this
time?
v [m3/h]
???
t
t0
t1
Fig.: error output
Table: Error Output Options
selected error output option
output signal
I [mA]
20
td
4
t
I [mA]
20
4
t
I [mA]
20
td
4
t
49
I [mA]
20
td
error output = 2.00 mA
4
t
Select a list item for the error output. Press ENTER.
If OTHER VALUE ... is selected, enter an error value.
It has to be within the limits of the output.
Press ENTER.
Note:
The settings will be stored now at the end of the dialog.
The terminals to be used are now displayed (here: P1+
und P1- for the active current loop)
Press ENTER.
10.1.3
Function Test
The function of the installed output can now be tested. Connect a multimeter to the installed output.
Test of the Analog Outputs
The current output is tested in the example.
Enter a test value. It has to be within the output range.
Press ENTER.
If the multimeter displays the entered value, the input
works.
Select YES to repeat the test, NO to return to SYSTEM
SETTINGS.
Press ENTER.
50
Test of the Binary Outputs
Select REED-RELAIS OFF in the scroll list OUTPUT
TEST to test the de-energized state of the output.
Press ENTER.
The output should now be de-energised.
(Measure the resistance at the output. The value has to
be high ohmic.)
Select YES.
Press ENTER.
Select REED-RELAIS ON in the scroll list OUTPUT
TEST to test the energized state of the output.
Press ENTER.
The output should now be energised.
(Measure the resistance at the output. The value has to
be low ohmic.)
Select YES to repeat the test, NO to return to SYSTEM
SETTINGS.
Press ENTER.
10.2 Error Value Delay
The error value delay is the time interval after which the error value will be transmitted to the output in
case no valid measured values are available. The error value delay can be entered in the program
branch OUTPUT OPTIONS if this menu item has been previously activated in the program branch
SPECIAL FUNCTION. If you do not enter a value for the error delay, the damping will be used.
Select in
SPECIAL FUNCTION \ SYSTEM SETTINGS \
DIALOGS/MENUS the menu item
ERROR-VAL. DELAY.
Select DAMPING if the damping value is to be used as
error value delay. Select EDIT to activate the error
value delay request.
From now on, the error value delay can be entered in
the program branch OUTPUT OPTIONS.
The setting is cold start resistant.
51
10.3 Activation of an Analog Output
Note:
An
output
can
only
be
activated
in
the
program
OUTPUT OPTIONS if it has been previously installed.
branch
Select program branch OUTPUT OPTIONS in the main
menu.
Select YES to activate an output.
Press ENTER to confirm.
10.3.1
Measuring Range of the Analog Outputs
After an analog output has been activated in the program branch OUTPUT OPTIONS, the measuring
range of the source item has to be entered.
Enter in Zero-Scale Val. the lowest measured
value expected. The unit of measurement of the
source item will be displayed.
Zero-Scale Val. is the measured value
corresponding to the lower limit of the output range as
defined in section 10.1.1.
Enter in Full-Scale Val. the highest measured
value expected.
Full-Scale Val is the measured value
corresponding to the upper limit of the output range as
defined in section 10.1.1.
Example: The output range 4…20 mA was selected for a current loop, the Zero-Scale Val value
was set to 0 m3/h and the Full-Scale Val value to 300 m3/h. If the volume flow is 300 m3/h, a
20 mA signal is transmitted to the output. If the volume flow is 0 m3/h, a 4 mA signal is transmitted to
the output.
52
10.4 Activation of a Pulse Output
A pulse output is an integrating output which emits a pulse when volume or mass of the medium which
has passed the measuring point reaches a given value (PULSE VALUE). The integrated quantity is the
selected physical quantity. Integration is restarted when a pulse is emitted.
Note:
The menu item PULSE OUTPUT will be displayed in the program branch
OUTPUT OPTIONS only if a pulse output has been installed.
Select the program branch OUTPUT OPTIONS in the
main menu.
Select YES to activate the output.
Press ENTER.
This error message will be displayed if the flow velocity
is selected as physical quantity.
The use of the pulse output is not possible in this case
as integration of the flow velocity does not result in a
reasonable value.
Enter the PULSE VALUE. The unit of measurement of
the current physical quantity will be displayed
automatically.
When the totalized physical quantity reaches the pulse
value, a pulse will be emitted.
Enter the PULSE WIDTH. Values between 80 ms and
1000 ms will be accepted.
The range of possible pulse widths depends on the
specifications of the instrument (e.g. counter, PLC)
which will be connected with the pulse output.
The max. flow that the pulse output can work with will be displayed now. This value is calculated from
the data given for pulse value and pulse width. If the flow exceeds this value, the pulse output will not
function properly. In such a case, the pulse value and pulse width should be adapted to the flow
conditions. Press ENTER.
Attention!
If the flow exceeds this max. value, the pulse output will not
function properly.
10.5 Activation of an Alarm Output
Note:
The menu item ALARM OUTPUT will be displayed in the program branch
OUTPUT OPTIONS only if an alarm output is installed.
Max. 3 alarm outputs R1, R2, R3 per channel operating independently of each other can be
configured. The alarm outputs can be used to output information on the current measurement or to
start and stop pumps, motors, etc.
53
10.5.1
Alarm Properties
The switching condition, the holding behaviour and the switching function can be defined for an alarm
output:
Table: Alarm Properties
alarm property
FUNC (switching
condition)
setting
MAX
The alarm will switch when the measured value exceeds the upper limit.
MIN
+
TYP (holding
behavior)
MODE (deenergized state
of the alarm)
description
The alarm will switch when the measured value falls below the lower limit.
- -
+
The alarm will switch when the flow direction changes (sign change of
measured value).
QUANTITY
The alarm will switch when totalizing is activated and the totalizer reaches
the limit.
ERROR
The alarm will switch when no measurement is possible.
OFF
The alarm is switched off.
NON-HOLD
If the switching condition is not true any more, the alarm returns to idle state
after approx. 1 second.
HOLD
The alarm is energized when the switching condition is true and deenergized when idle.
NO CONT.
The alarm is energized when the switching condition is true and
de-energized when idle.
NC CONT
The alarm is de-energized when the switching condition is true and.
energized when idle.
If no measurement takes place, all alarms will be de-energized,
independently of the programmed switching function.
Attention!
Select the program branch Output Options in the
main menu.
Select YES to activate the alarm output.
Press ENTER.
The following list items are available:
• FUNC for selecting the switching condition,
• TYP for selecting the holding behavior ,
• MODE for selecting the de-energized state of the
alarm.
Select a scroll list in the upper line with keys
Use keys
and
and
.
to select the according settings in the second line.
Press ENTER to store all changings.
54
10.5.2
Setting the Limits
If MAX or MIN has been selected in the scroll list FUNC, the limit of the output has to be defined:
Select in the scroll list INPUT the physical quantity to
be used for comparison. The following list items are
available:
• volume flow
• signal amplitude
• sound velocity of the medium
Press ENTER.
Enter the limit:
Table: limits
function
MAX
display and comparison
note
Example 1:
upper limit = -10.0 m3/h
A measured value of e.g. -9.9 m3/h exceeds
the limit. The alarm switches.
A measured value of e.g. -11.0 m3/h does not
exceed the limit. The alarm does not switch.
measured value > limit
The alarm will switch when the
measured value exceeds the upper
limit.
Example 2:
MIN
lower limit = -10.0 m3/h
measured value < limit
The alarm will switch when the
measured value falls below the lower
limit.
QUANTITY
totalizer ≥ limit
The alarm will switch when the totalizer
reaches the limit.
Note:
A measured value of e.g. -11.0 m3/h is below
the limit. The alarm switches.
A measured value of e.g. -9.9 m3/h is not
below the limit. The alarm does not switch.
A positive limit will be compared to value of
the totalizer for the positive flow direction.
A negative limit will be compared to value of
the totalizer for the negative flow direction.
The comparison will also be made if the
totalizer of the other flow direction is
displayed.
The limit values are interpreted in the respective active unit.
If the global unit setting is changed, the limits are not
automatically adapted and have to be changed manually.
Example: If a limit of 60.0 m3/h is defined and if the unit is
changed to m3/min, the limit has to be changed to 1,0 m3/min
55
10.5.3
Defining the Hysteresis
A hysteresis can be defined for alarm output R1 preventing a constant triggering of the alarm by
measuring values fluctuating marginally around the limit. The hysteresis is a symmetrical range
around the limit. The alarm will be activated if the measured values exceed the upper limit and
deactivated if the measured values fall below the lower limit.
Example: The limit is 30 m3/h and the hysteresis 1m3/h. The alarm will be triggered at values
> 30.5 m3/h deactivated at values < 29.5 m3/h.
Enter the preferred range of the hysteresis or 0 (zero) to
work without it.
Press ENTER.
10.6 Behaviour of the Alarm Outputs
10.6.1
Apparent Switching Delay
Measured values and totalizer values will be displayed rounded to two decimal places. The limits,
however, will be compared to the non-rounded measured values. This might cause an apparent
switching delay when the measured value changes marginally (less than two decimal places). In this
case, the switching accuracy of the output is greater than the accuracy of the display.
10.6.2
•
Reset and Initialization of the Alarms
After a cold start, all alarm outputs will be initialized. They will then be in the following state:
Table: State of the output after initialization
FUNC:
TYPE:
MODE:
LIMIT:
OFF
NON-HOLD
NO CONT
0.00
• (only valid from Firmware-Version 5.42) Press three times key C during measurement to set all
alarm outputs to the idle state. Alarm outputs whose switching condition is still met will be
reactivated after 1 second. This function is used to reset alarm outputs of type HOLD if the
switching conditions is not met anymore.
• By pressing key BRK, the measurement will be stopped and the main menu selected. All alarm
outputs are de-energised, independently of the programmed idle state.
10.6.3
Storage of Alarm Outputs
The configuration of the alarm outputs is stored in the active parameter set (branch
SPECIAL FUNCTION) and is automatically loaded, if the respective parameter set is loaded.
10.6.4
Alarm Outputs during Transducer Positioning
When the positioning of the transducers begins (bar graph display), all alarm outputs switch back to
the programmed idle state.
If the bar graph is selected during measurement, all alarm outputs switch back to the programmed idle
state. An alarm output of type HOLD being activated during the previous measurement remains in the
idle state after transducer positioning if the switching condition is not anymore met.
The same result can be achieved by pressing key C three times during measurement. Switching of the
alarms into the idle state will not be displayed.
56
10.6.5
Alarm Outputs during Measurement
An alarm output with switching condition MAX or MIN will be updated max. once per second to avoid
humming (i.e. fluctuation of the measured values around the value of the switching condition).
An alarm output of type NON-HOLD will be activated if the switching condition is met. It will be
deactivated if the switching condition is not met anymore. The alarm remains activated min. 1 second
even if the switching condition is met shorter.
Alarm outputs with switching condition QUANTITY will be activated immediately when the limit is
reached.
Alarm outputs with switching condition ERROR will be activated only after several unsuccessful
measuring attempts. Therefore, typical short-term disturbances of the measurement (e.g. switching on
of a pump) will not activate the alarm.
If the alarm outputs are of type HOLD, they are switched back after the first measuring value has been
recorded.
If there is an internal adaptation to changing measuring conditions, e.g. to a considerable rise of the
medium temperature, the alarm will not switch.
Alarm outputs with the switching condition OFF are automatically set to the switching function NO
CONT. The alarm output is de-energised.
Flow
Alarm outputs with switching condition
+ - - + and type NON-HOLD will be
activated with each change of the flow
direction for approx. 1 second.
type NON-HOLD
approx. 1 s
Alarm outputs with switching condition + - + and type HOLD will be activated after the
first change of the flow direction. They can
be switched back by pressing key C three
times.
type HOLD
manual reset
of the alarm
Fig: Behavior of a relay when the flow
direction changes
57
10.6.6
Alarm State Indication
Note:
There is no visual or acoustic indication of alarm switching.
The state of the alarm can be displayed during measurement. This function will be activated in
SPECIAL FUNCTION \ SYSTEM SETTINGS \ DIALOGS/MENUS. The setting is cold start resistant.
Select the menu item SHOW RELAIS STAT. Select ON
to activate the display of the alarm state.
Scroll during measurement with key
of alarm is displayed in the upper line.
until the state
The state of alarm will be displayed like this:
RX =
, where
is a pictogram according to the following Table:
Example: R1 =
no.
function
type
switching
function
1
none
NON-HOLD
NO CONT
closed
2
MAX
HOLD
NC CONT
open
3
MIN
R
actual state
=
+
+
QUANTITY
ERROR
10.7 Deactivation of the Outputs
If the programmed outputs are no longer required, they can be deactivated. The configuration of the
deactivated output is stored and will be available when the output is reactivated.
To deactivate an output, select NO in the according
program branch.
Press ENTER.
58
11 Settings and Special Functions/ Menu SF
11.1 Language Change (HotCode)
To change the language you have to enter a so called HotCode.
Select menu SPECIAL FUNCTION \ SYSTEM SETTINGS \
MISCELLANEOUS \ Input a HOTCODE.
Select YES.
Enter the HotCode and confirm by pressing ENTER.
There will be a failure message, if the HotCode is invalid.
Press any key to continue.
Select YES to carry on or NO to return to program branch
MISCELLANEOUS.
HotCodes for language change:
909031
909033
909034
909042
909044
Dutch
French
Spanish
Czech
English
909045
909047
909048
909049
909090
Danish
Norwegian
Polish
German
Turkish
After the last digit has been entered, the new language is activated and the UDM 200 returns to the
main menu. The selected language remains active even after the device has been restarted. If your
language is not contained in the list, please contact SebaKMT.
59
11.2 Time and Date
UDM 200 has a battery buffered clock. Measured values will be stored automatically with time and
date.
Select in SPECIAL FUNCTION \ SYSTEM SETTINGS
the list item SET CLOCK.
Press ENTER.
The actual time is displayed. Select OK to confirm the
time or NEW to set the time.
Press ENTER.
Select the digit to be edited by key
Edit the selected digit by key
Press ENTER.
.
and
.
The new time will be displayed. Select OK to confirm
the time or NEW to set the time again.
Press ENTER.
After the time has been set, DATE will be displayed
Select OK to confirm the date or NEW to set the date.
Press ENTER.
Select the digit to be edited by key
Edit the selected digit by key
Press ENTER.
and
.
.
The new date will be displayed. Select OK to confirm
the date or NEW to set the date again.
Press ENTER.
60
11.3 Dialoges and Menus
Select SPECIAL FUNCTION \ SYSTEM SETTINGS.
Select the list item DIALOGS/MENUS.
Press ENTER.
Note:
11.3.1
The settings of the menu item DIALOGS/MENUS will be stored at the
end of the dialog. If the menu item is left before the end of the
dialog, the settings will not be effective.
Pipe Circumference
Select ON if the pipe circumference has to be entered
instead of the pipe diameter in the program branch
PARAMETERS.
The setting is cold start resistant.
Press ENTER.
If ON has been selected for PIPE CIRCUMFER. the
outer pipe diameter will be requested in the program
branch PARAMETER nevertheless.
To change to the menu item PIPE CIRCUMFER., enter
0 (zero). Press ENTER.
The value displayed in PIPE CIRCUMFER. is
calculated on the basis of the last displayed value of the
outer pipe diameter.
Example: 100 mm * = 314.2 mm
Enter the pipe circumference.
(The parameter limits for the circumference are
calculated on the basis of the limits for the outer pipe
diameter.)
During the next scroll through the program branch
PARAMETER, the outer pipe diameter corresponding to
the entered pipe circumference will be displayed.
Example: 180 mm : = 57.3 mm
Note:
The circumference is edited temporarily only. When the flowmeter
switches back to the display of the pipe circumference (internal
recalculation), slight rounding errors may occur.
Example:
entered circumference: 100 mm
displayed outer pipe diameter: 31.8 mm
When the flowmeter switches back to the circumference internally,
99.9 mm will be displayed.
61
11.3.2
Measuring Point Number Indication
If "1234" is selected, only figures, dots and hyphens can
be used to name the measuring point number.
If "
" is selected, the ASCI editor can be used to
name the measuring point number.
11.3.3
Display of the lastly entered Transducer Distance
If TRANSDUCER DISTANCE \ USER is selected, the
after the positioning of the transducers lastly entered
transducer distance will be displayed.
If the recommended and the entered transducer
distance are not identical, the recommended value will
be displayed in parentheses, followed by the lastly
entered precise transducer distance.
This adjustment is recommended if you work
permanently on the same metering point.
If TRANSDUCER DISTANCE \ AUTO is selected,
exclusively the after the positioning of the transducers
recommended transducer distance will be displayed.
This adjustment is recommended if you often
change the metering point.
11.3.4
Error Value Delay
Select EDIT to enter an error value delay.
The error value delay is the time after which an error
value will be sent to an output if no valid measured
values are available.
Select DAMPING if the damping value is to be used as
error value delay.
11.3.5
Alarm State Indication
Select ON to display the alarm state during
measurement.
Note:
All changes will be stored now at the end of the configuration
dialog.
62
11.4 Measurement Settings
Select in
SPECIAL FUNCTION \ SYSTEM SETTINGS the list
item MEASURING.
Press ENTER.
Note:
The settings of the menu item MEASURING will be stored at the end
of the dialog. If the menu item is left before the end of the
dialog, the settings will not be effective.
If you select NORMAL, corrected values of the flow
velocity will be displayed.
If you select uncorr., uncorrected values will be
displayed. The setting is cold start resistant.
Press ENTER.
It can be defined how the cut-off flow is handled (see
section 9.5).
An upper limit for the flow velocity can be entered.
Values between 0.1 m/s and 25.5 m/s will be
accepted. Enter 0 (zero) to switch off the flow velocity
check.
Select the overflow behaviour of the totalizers (see
section 9.3.2).
Select ON to keep the previous totalizer values after
restart of the measurement.
Select OFF to reset to zero the totalizers after restart
of the measurement.
Note:
All changes will be stored now at the end of the dialog.
63
11.5 Configuring Serial Data Transfer
You
can
set
some
format
information
for
serial
output
under
SPECIAL FUNCTION \ SYSTEM SETTINGS \ SERIAL TRANSMISSION. This means you can
adapt the output to the device the data is sent to: a PC or a printer
Target PC:
Target printer:
Recommended setting ON. Space
characters are not transferred when
numerical values are exported. This
significantly reduces the file size
(making the transfer faster).
Recommended setting
OFF – all measured
valued in a column are
printed below each other
The decimal separator for flow data
(full stop or comma) differs from
country to country.
This setting depends on
the country.
The character used to separate
columns (semicolon or tab) depends
on the PC program. Normally, both
separators can be used.
TAB increases the overall
width of a column
according to the tab stops
on the printer.
11.6 Contrast
Select the branch SPECIAL FUNCTION \
SYSTEM SETTINGS \ MISCELLANEOUS and press ENTER.
The contrast of the display will be set by the following keys:
increases the contrast,
decreases the contrast.
Note:
The display will be reset to medium contrast after a cold start.
11.7 Instrument Information
Select SPECIAL FUNCTION \ INSTRUM. INFORM.
to obtain information about
• the type and serial number of thedevice and
• the firmware version.
Press ENTER.
Type and serial number of the device are displayed in the
upper line.
The firmware version with date is displayed in the lower line.
Press ENTER.
64
11.8 Printing Measured Values
With offline output, the measured values in the memory are output. The data can be transferred:
• to a printer connected to the serial interface of the UDM 200 or
• as an ASCII file to a terminal program (e.g. HyperTerminal in Windows).
Select SPECIAL FUNCTION. Press ENTER to confirm Scroll through the list until you see
PRINT MEAS. VAL. .
Press ENTER to confirm.
Connect the UDM 200 to a PC or printer using the serial
interface. Press ENTER to start the output of the
measured values. The display indicates that the
measured values are being transferred.
The bar shows the progress of the data output.
11.9 Deleting Measured Values
This special function enables you to delete measured values from the memory of the UDM 200. Select
SPECIAL FUNCTION. Press ENTER to confirm Scroll through the list to DELETE MEAS. VAL..
Press ENTER to confirm.
Select YES and press ENTER to confirm
65
12 SuperUser Mode
The SuperUser mode allows experimental work. Features of the SuperUser mode are:
• Defaults will not be observed.
• There are no plausibility checks when parameters are being entered.
• There is no check whether the entered parameters are within the limit determined by physical laws
and technical data.
• The cut-off flow is not active.
• A value for the number of sound paths has to be entered.
It is possible to modify the lower limit of the inner pipe diameter for a certain transducer type without
activating the SuperUser mode.
12.1 Activating/Deactivating
Enter HotCode 071049 to activate the SuperUser mode.
It is displayed that the SuperUser mode is activated.
Press ENTER. The main menu will be displayed.
Enter HotCode 071049 again to deactivate the SuperUser mode.
It is displayed that the SuperUser mode is deactivated.
Press ENTER. The main menu will be displayed.
The SuperUser mode will be deactivated by switching off the flowmeter, too.
12.2 Malfunctions in SuperUser Mode
As the SuperUser mode operates without any plausibility check, absurd entries may result in an
automatic switching-off of the device or in a crash of the internal software. An absurd entry is, e.g.,
0 (zero) for the number of sound paths or 0.1 mm for the outer pipe diameter.
Switch on the UDM 200 again and reactivate the SuperUser mode. If necessary, RESET the UDM 200
by pressing keys BRK, C and ENTER simultaneously.
Note:
A Reset does deactivate the SuperUser mode.
66
13 Libraries
Note:
Only experienced users should use libraries. You need
specific data for materials and substances supplied by
manufacturer.
SebaKMT does not have this information.
the
the
The internal database in the measuring device contains more than 20 different materials (pipe
material, cladding) and more than 40 different media. You can select certain materials and media to
appear in the PARAMETERS list (pipe material, cladding, medium). This means you can adapt the list to
your particular measuring tasks. The reduced list makes your work more efficient (see the next
section).
An integrated user memory (coefficient memory) allows users to define other materials and media
themselves. The properties of these materials can be saved in multiple instances depending on
pressure and temperature if necessary. This user memory can be partitioned as required. You can find
additional information on user-defined materials and media in the following sections.
13.1 Editing the Selection Lists
The procedures for editing the material list and the medium list are the same, which is why only the
editing procedure for the material list is described here.
Note:
User-defined materials and
PARAMETER selection lists.
media
are
always
displayed
in
the
Go to SPECIAL FUNCTION, select SYSTEM SETTINGS
and press ENTER.
In the SYSTEM SETTINGS list select LIBRARIES and
press ENTER.
Select MATERIAL LIST to edit the material list or
MEDIUM LIST to edit the medium list.
Select ...BACK to return to SYSTEM SETTINGS.
Press ENTER to confirm.
Select FACTORY if you want the list to contain all the
materials and media in the internal database. If you
have created your own list, this is not deleted, only
deactivated.
Select USER to enable the user-defined list.
Press ENTER to confirm.
If you selected USER, you can now edit the list. The
options in the list are described in the following
sections.
67
After editing, select END OF EDIT and press ENTER.
Select YES to save all the changes to the list, or NO to
quit the edit menu without saving.
Press ENTER to confirm.
Note:
13.1.1
If you press BRK to quit the edit menu without saving, all changes
are discarded.
Displaying a Selection List
Select SHOW LIST and press ENTER to display the list
as it will appear under PARAMETERS.
The current list is shown in the bottom line.
User-defined materials and media are always shown in
the current user-defined list.
Press ENTER to quit the current list and return to the
list edit menu.
13.1.2
Adding a Material or Medium to the List
Select ADD MATERIAL or ADD MEDIUM to add a
material or medium to the list.
Press ENTER to confirm.
In the second line, the UDM 200 shows a list of all
materials or media that are not contained in the current
list.
Select the material or medium to add and press
ENTER. The material or medium is added to the list.
Note:
The materials and media appear in the list in the order that they
were added.
68
13.1.3
Removing a Material or Medium from the List
Select REMOVE MATERIAL or REMOVE MEDIUM to
delete a material or medium from the list.
In the second line, the UDM 200 shows a list of all
materials or media that are contained in the current list.
Select the material or medium to remove and press
ENTER. The material or medium is removed from the
list.
Note:
13.1.4
User-defined materials and media are always shown in the current
user-defined list. They cannot be deleted.
Removing all Materials or Media from the List
Select REMOVE ALL and press ENTER to delete all the
materials or media from the current list. User-defined
materials and media are not removed.
Note:
13.1.5
User-defined materials and media are always shown in the current
user-defined list. They cannot be deleted.
Adding all Materials or Media to the List
Select ADD ALL and press ENTER to add all materials
or media from the database to the current list.
69
13.2 Defining New Materials or Media
The UDM 200 enables you to extend the internal material database by defining materials or media
(user-defined materials or media). The entries are saved in the user memory.
The number of materials or media which can be defined depends on the partitioning of the user
memory (see the next section). User-defined materials and media are always displayed in the
PARAMETER selection list. The user-defined materials and media remain saved even after a cold start.
The basic properties of a medium are its minimum and maximum sound velocity, its viscosity and its
density. The basic properties of a material are its transversal and longitudinal sound velocity and a
typical surface roughness. If the “Extended library” function is activated, you can define the medium
properties as functions of the temperature or pressure. You can find additional information on the
“Extended library” function in the following section.
Note:
13.2.1
The user memory must be partitioned (divided), before the data can
be stored.
Partitioning the User Memory
The overall capacity of the user memory can be divided as required into the following material data
types:
• Basic data of a material (sound velocity, typical roughness)
• Basic data of a medium (sound velocity, kinematic viscosity, density)
The following table shows the maximum number of data records for each category.
Table: User memory capacity
Maximum number of data records
Assignment of
user memory in %
Materials
13
97
Media
13
95
Go to SPECIAL FUNCTION \ SYSTEM SETTINGS \
LIBRARIES and select FORMAT USER-AREA.
Press ENTER to confirm.
The following display appears if the required number of
data records for a particular data type exceeds the
capacity of the user memory.
Enter the number of user-defined materials.
Press ENTER to confirm.
Enter the number of user-defined media.
Press ENTER to confirm.
70
Enter 0. You can only enter heat flow coefficients if your
device is equipped with temperature inputs.
Press ENTER to confirm.
Enter 0. You can only enter vapour phase coefficients if
your device is equipped with temperature inputs.
Press ENTER to confirm.
Enter 0. You can only enter concentration coefficients if
your device is equipped with temperature inputs.
Press ENTER to confirm.
The UDM 200 displays the assignment of the user
memory for a few seconds.
The UDM 200 prompts you to confirm the selected
partition. Press YES to start the partitioning.
Press ENTER to confirm.
The UDM 200 partitions the user memory according to
your entries. This takes a few seconds.
Once the partitioning is complete, the UDM 200 returns
to the FORMAT USER-AREA display.
Preserving data when partitioning the user memory
When repartitioning the user memory, the UDM 200 can retain up to 8 data records of each type.
Example 1: You reduce the number of user-defined materials from 5 to 3. The data records #01 to #03
are retained. Data records #04 and #05 are deleted.
Example 2: You increase the number of user-defined materials from 5 to 6. All 5 data records are
retained.
71
13.2.2
Extended Library Function
The EXTENDED LIBRARY function enables you to enter the medium and material properties as
functions of the temperature or pressure. It must be enabled under SPECIAL FUNCTIONS before any
material properties can be defined. The following table provides an overview of the material properties
which can be entered and the measuring processes required for them.
Table: Medium and material properties which can be stored
Property
Property required for ...
Basic data of a medium
Sound velocity (MIN and MAX)
Start of measurement
Viscosity
Profile correction in the flow rate
Density
Mass flow calculation
Basic data of a material
Transversal sound velocity
Flow measurement
Longitudinal sound velocity
Wall thickness and/or flow rate measurement
Type of sound wave
Flow measurement
Typical roughness
Profile correction of the flow rate
Only enter data which is relevant to your measurements.
Example: The density of a material is unknown. If you are not interested in the mass flow, you can
enter any constant value for the density. The measurements for the flow rate and the volumetric flow
are not affected. However, the measurement for the mass flow will be incorrect.
The dependency of certain material properties on temperature and pressure can be described using
first- to fourth-degree polynomials or other specialised interpolation functions. In most cases, however,
a constant value or a linear dependency is sufficient. If, for example, the temperature fluctuations at
the measuring point are relatively minor compared to the temperature dependencies of the material
properties, linearisation or ignoring the temperature dependencies will not cause significant measuring
errors. However, if the process conditions fluctuate greatly and the properties of the materials are
highly temperature-dependent (such as the viscosity of hydraulic oils), polynomials or other
interpolation functions should be used.
Specialised interpolations
Some dependencies are difficult to approximate using polynomials. Therefore, the UDM 200 offers a
specialised interpolation function (Option “Basics:Y=f(x,z)”). Multidimensional dependencies
(y=f(T,p)) can be interpolated using this function.
Go to SPECIAL FUNCTION \ SYSTEM SETTINGS \
LIBRARIES and select EXTENDED LIBRARY.
Press ENTER to confirm.
Select OFF to disable the EXTENDED LIBRARY function. The
properties of materials and media can then only be entered as
constants. User-defined media or materials can be very easily
defined. The library is compatible with firmware version V3.xx.
Select ON to enter additional data or material properties that
depend on temperature or pressure.
Press ENTER to confirm.
72
13.2.3
Entering Material or Medium Properties without Using the
Extended Library
Disable the extended library function (see the previous section) if you do not want to define material
data that depends on temperature or pressure. The procedures for entering material and medium
properties are the same.
Go to SPECIAL FUNCTION , select
INSTALL MATERIAL or INSTALL MEDIUM and
press ENTER.
An error message appears if you did not reserve
enough space for the user-defined materials or media
when partitioning the user memory. If this happens,
partition the user memory accordingly (see the previous
section).
Select EDIT and press ENTER.
Select one of the available memory spaces.
Press ENTER to confirm.
The default name of a user-defined material or medium
is USER MATERIAL N or USER MEDIUM N, where N is
an integer. This name can be changed at any time.
Note:
95 ASCII characters (lowercase letters, uppercase letters, numbers,
special characters [! ? " + - ( ) > < % * etc.] are available for
naming your material or medium. The name may not contain more than
16 characters.
Press ENTER to finish editing.
FOR A MATERIAL:
The UDM 200 asks for the sound velocity of the
material. The table in the appendix contains the sound
velocities of some materials. Values between 600.0 and
6553.5 m/s are accepted.
Press ENTER to confirm.
Enter the roughness of the pipe here. The table in the
appendix contains the typical roughness of some pipes.
Press ENTER to confirm.
73
FOR A MEDIUM:
Enter the minimum sound velocity for the medium to be
measured in m/s. Values between 800.0 and 3500 m/s
are accepted.
Press ENTER to confirm.
Enter the maximum sound velocity for the medium to be
measured in m/s. Values between 800 and 3500 m/s
are accepted.
Press ENTER to confirm.
Enter the kinematic viscosity of the medium. Values
between 0.01 and 30,000.00 mm2/s are accepted.
Press ENTER to confirm.
Enter the density of the medium.
Press ENTER to confirm.
13.2.4
Entering Material Properties Using the Extended Library
Make sure the extended library is enabled (see the previous sections).
Go to SPECIAL FUNCTIONS, select
INSTALL MATERIAL and press ENTER.
An error message appears if you did not reserve
enough space for the user-defined materials when
partitioning the user memory. If this happens, partition
the user memory accordingly.
Select the form of the temperature or pressure
dependency for the material properties.
Select Y=const. to enter the material properties as a
constant.
Basics:Y=m*X +n
Select Y=m*X +n to enter the material properties and
linear functions of the temperature.
Basics:Y=Polynom
Select Y=Polynom to enter the material properties as
polynomials:
y = k 0 + k1 ⋅ x + k 2 ⋅ x 2 + k 3 ⋅ x 3 + k 4 ⋅ x 4 .
Basics:Y=f(x,z)
Select Y=f(x,z) to enter the material properties using
one of the predefined functions (for experienced users
only).
...go back
Select …GO BACK to return to the previous menu.
74
Select the material whose properties you want to
define. The default name of a user-defined material or
medium is USER MATERIAL N or USER MEDIUM N,
where N is an integer.
If you select a material whose properties have already
been defined, the UDM 200 prompts you to confirm.
Select EDIT to edit the properties of the material or
DELETE to delete the defined properties and return to
the EDIT MATERIAL list.
Enter the material designation.
Press ENTER to confirm.
The UDM 200 now asks you for the transversal and longitudinal sound velocities of the material (in
m/s). According to the previously selected dependencies of the material properties to the process
characteristics, you are then asked to enter one to five coefficients for each material property. Press
ENTER to confirm each value. If you are editing a material that has already been defined, the
UDM 200 asks you whether you want to edit each property. Select YES or NO, press ENTER to
confirm and edit the coefficients if applicable
Select the type of sound wave to be used for the flow
measurement. Normally, this is a transversal sound
wave (TRANS).
Press ENTER to confirm.
Enter the typical roughness of the material.
Press ENTER to confirm.
Select YES to save the properties you entered or NO to
quit the dialogue without saving.
Press ENTER to confirm.
75
13.2.5
Entering Medium Properties Using the Extended Library
Make sure the extended library is enabled.
Go to SPECIAL FUNCTION, select INSTALL MEDIUM
and press ENTER.
An error message appears if you did not reserve
enough space for the user-defined media when
partitioning the user memory. If this happens, partition
the user memory accordingly.
Select the form of the temperature or pressure
dependency for the material properties.
Select Y=const. to enter the material properties as a
constant.
Basics:Y=m*X +n
Select Y=m*X +n to enter the material properties and
linear functions of the temperature.
Basics:Y=Polynom
Select Y=Polynom to enter the material properties as
polynomials:
y = k 0 + k1 ⋅ x + k 2 ⋅ x 2 + k 3 ⋅ x 3 + k 4 ⋅ x 4 .
Basics:Y=f(x,z)
Select Y=f(x,z) to enter the material properties using
one of the predefined functions (for experienced users
only).
...go back
Select …GO BACK to return to the previous menu item.
Select the medium whose properties you want to
define. The default name of a user-defined material or
medium is USER MATERIAL N
or USER MEDIUM N, where N is an integer.
if you select a medium whose properties have already
been defined, the UDM 200 prompts you to confirm.
Select EDIT to edit the properties of the medium or
DELETE to delete the defined properties and return to
the EDIT MEDIUM list.
Enter the medium designation.
Press ENTER to confirm.
76
The UDM 200 then prompts you to enter the longitudinal sound velocity (in m/s), the kinematic
viscosity (in mm2/s) and the density (in g/mm3) of the medium. According to the previously selected
dependencies of the medium properties to the process characteristics, you are then asked to enter
one to five coefficients for each medium property. Press ENTER to confirm each value. If you are
editing a medium that has already been defined, the UDM 200 asks you whether you want to edit each
property. Select YES or NO, press ENTER to confirm and edit the coefficients if applicable.
Select YES to save the properties you entered or NO to
quit the dialogue without saving.
Press ENTER to confirm.
13.2.6
Deleting a User-Defined Material or Medium
This is how to delete a user-defined material or medium:
Go to SPECIAL FUNCTION, select
INSTALL MATERIAL or INSTALL MEDIUM and
press ENTER to confirm.
Select DELETE and press ENTER to confirm.
Select the material or medium to be deleted.
Press ENTER to confirm.
The UDM 200 prompts you to confirm. Select YES or NO.
Press ENTER to confirm.
77
14 PC Software
The data stored in the UDM 200 (FLUXUS) can be transferred using a software program to a PC for
processing.
Note:
End all programs that access a COM port (such as ACTIVESYNC, HOTSYNC
or SebalogView) before using this program. SebaKMT assumes that you
are familiar with the basics of using a PC, i.e. you know how to
find out which COM ports on your PC are available and which one you
must select.
SebaKMT cannot offer support for the Windows operating system.
14.1 Symbols in the Menu Bar
Connects the PC to the UDM 200 and loads the data
from the memory.
Load files
Save files
Use these symbols to select how the data is displayed:
• Shows the parameter record
• Shows the measured values in a table
• Shows the measured values in a graph
78
14.2 Connecting to the UDM 200
Connect the UDM 200 (FLUXUS) to the PC using the null modem cable supplied. If you have lost this
cable, you can use any standard null modem cable.
Go to the “Options” menu and select “Serial Interface”:
Go to “Interface” and select COM port you connected the cable to. Do not change the other settings.
Note:
The COM port settings are different on each computer and depend on
the operating system. In particular, if you use an USB-RS232
adapter, the COM port may change if you plug the adapter into
various USB ports. SebaKMT cannot offer support for this.
Once you have selected the correct COM port, you can connect to the UDM 200.
79
14.3 Downloading Data
As soon as you have selected the correct port, click the
UDM 200 and downloads the records.
symbol. The PC connects to the
You should then see at least one record in the software. If not, check that you have enabled the
saving of measured data.
80
Click the data records to activate them. You can then see the measured values, for example the flow
rate:
Click the “Statistics...” button to see the most important data for the measurement (minimum,
maximum, etc):
81
14.4 Changing the Software Language
You can select one of the available languages by clicking the icon with the flags.
14.5 Additional Software Options
The UDM 200 (FLUXUS) menu contains additional options for loading data from the device:
Receive measure values
Starts downloading data from the device
Date and time
Synchronises the clock on the UDM 200 with the PC
clock
Table values:
- Materials
- Media
- Languages
Shows you data contained in the device:
- Materials
- Media
- Pre-installed languages
Thermal flow coefficient
The UDM 200 does not support this function
Reset COM port
Ends communication with the UDM 200
Communication window
Shows the communication window, which is normally
only displayed during activity.
82
15 Troubleshooting
First Step: Check whether one of the situations listed below describes the problems you have
with your device.
a) The display does not work at all or always fails. Make sure that the device is charged. If
this is the case and if the accumulator is in good shape, the transducers or an internal
component of the flowmeter are defective. Transducers and flowmeter have to be sent for
repair to SebaKMT.
b) The message “SYSTEM ERROR” is displayed. Press key BRK to return to the main menu.
If the message is displayed repeatedly, note the number in the lower line. Track down the
situations when the error is displayed. Contact SebaKMT.
c) The UDM 200 does not react when key BRK is pressed during measurement.
A program code has been defined. Press key C and enter the program code.
d) The backlight of the display does not light, but all other functions are available.
The backlight is defective. This problem has no influence on the other functions of the display.
Send the flowmeter to SebaKMT for repair.
e) Date and time are wrong and the measured values are deleted after restart. The data
backup battery has to be replaced. Send the device to SebaKMT.
f) An output does not work. Make sure that the outputs are configured correctly. Check the
function of the output as described in section 10. If the output is defective, contact SebaKMT.
g) Measurement is impossible or the measured values substantially differ from the expected
values. See section 15.1.
h) The totalizer values are wrong. See section 15.6.
If any problem appears which can not be solved with the help of this manual, contact our sales office
giving a precise description of the problem. Specify the type, serial number and firmware version of
the flowmeter.
Calibration
The UDM 200 is a very reliable instrument. It is manufactured under strict quality control,
modern production techniques. If installed as recommended in an appropriate location,
cautiously and taken care of conscientiously, no troubles should appear. The device has
calibrated at the factory and usually, a re-calibration of the device will not be necessary.
calibration is recommended if
using
used
been
A re-
• the contact surface of the transducers show visible wear or
• the transducers were used for a prolonged period at a high temperature (several months > 130 °C
for normal transducers or > 200 °C for high tempera ture transducers).
The UDM 200 has to be sent to SebaKMT for recalibration under reference conditions.
83
15.1 Problems with the Measurement
a) A measurement is impossible as no signal is received. A question mark will be displayed at
the right side of the lower line.
o
Make sure that the entered parameters are correct, especially the outer pipe diameter, the
wall thickness and the sound velocity of the medium. (Typical errors: The circumference
or the radius was entered instead of the diameter. The inner diameter was entered instead
of the outer diameter.)
o
Are the transducers properly arranged? Do the arrows point to the right direction?
Attention: The arrows on the transducer shoes might be arranged in a different way as the
arrows on the transducers.
o
Make sure that the transducer distance recommended by the UDM 200 was observed
when mounting the transducers.
o
Make sure that an appropriate measuring point has been selected (see section 7.1).
o
Try to obtain better acoustic contact between the pipe and the transducers (see section
15.3.
o
Enter a lower value for the number of sound paths. The signal attenuation might be too
high due to a high medium viscosity or deposits on the inner pipe wall (see section 15.4).
b) The measuring signal is received but no measuring values can be obtained
An exclamation mark "!" in the lower right edge of the display indicates that the defined upper limit of
the flow velocity is exceeded and, thus, the measured values will be marked invalid. The limit has to
be adapted to the measuring conditions or the check has to be deactivated (v max = 0).
If no exclamation mark "!" is displayed, a measurement at the selected measuring point is impossible.
c) Loss of signal during measurement
If the pipe had been run empty and then has filled up again: Was there no measuring signal
afterwards? Contact SebaKMT.
Wait briefly until the acoustic contact is re-established. The measurement can be temporarily
impossible by a high proportion of gaseous or solid particles in the medium. If the measurement does
not start again, proceed as described under a).
d) The measuring values substantially differ from the expected values
Wrong measured values are often caused by wrong parameters. Make sure that the parameters
entered are correct for the measuring point.
If the parameters are correct, see section 15.5 for the description of typical situations in which wrong
measured values are obtained.
84
15.2 Correct Selection of the Measuring Point
• Make sure that the recommended min. distance to any disturbance source is respected (see
section 7.3).
• When measuring on horizontal pipes, the transducers have to be mounted to the side of the pipes.
Avoid locations where deposits are building in the pipe.
• A pipe vertically mounted has always to be filled at the measuring point, and the medium should
flow upward.
• Bubbles should be avoided (even bubble-free media can form gas pockets when the medium
expands, e.g. before pumps and after great cross-section extensions).
• Avoid measuring points in the vicinity of deformations and defects of the pipe and in the vicinity of
weldings.
• Measure the temperature at the measuring point and make sure that the transducers are
appropriate for this temperature.
Note:
If the temperature fluctuates at the measuring point, it is important
that the inner hook of the clasp grabs in the tension strip.
Otherwise, the pressure of the transducer will be insufficient when
the temperature is low.
For high temperature fluctuations, it is recommended to fix the
transducers with the help of the transducer shoes and chains which
are equipped with springs compensating the temperature-dependant
fluctuations of the pipe diameter.
• Make sure that the pipe diameter is within the measuring range of the used transducers.
15.3 Maximum Acoustic Contact
To reach a maximum acoustic contact between pipe and transducers, the measuring point as
to be prepared as follows:
• Clean the pipe at the transducer positions. Remove rust or loose paint. Rust, paint or other
deposits on the pipe will absorb the sound signal.
• An existing paint layer on the pipe should be sanded for a better measuring result.
• Use coupling foil or apply a bead of acoustic coupling compound along the center line onto the
contact surface of the transducer.
• There should be no air pockets between transducer contact surface and pipe wall. Make sure that
the transducer mounting fixture applies the necessary pressure on the transducers.
85
15.4 Application Specific Problems
The sound velocity of the medium is wrong. The entered sound velocity will be used to calculate
the transducer distance and, thus, is very important for the transducer positioning. The sound
velocities programmed in the device only serve as orientation values. It might be necessary to
determine the sound velocity first.
The entered pipe roughness is not appropriate. Reconsider the entered value, taking into account
the state of the pipe.
Measurements on porous pipe materials (e.g. concrete or cast iron) are only possible under
certain conditions. Contact SebaKMT.
The pipe liner may cause problems during measurement if it is not attached tightly to the inner
pipe wall or consists of acoustically absorbing material. Try measuring on a liner free section of
the pipe.
Media with high viscosity strongly attenuate the ultrasonic signal. Measurements on media with
a viscosity > 1000 mm2/s are only possible under certain conditions.
Higher proportions of or solids in the medium scatter and absorb ultrasounds and, therefore,
attenuate the measuring signal. A measurement is impossible if the value is
10 %. If the
proportion is high, but < 10 %, a measurement might be possible under certain conditions.
The flow is in the transition range between laminar and turbulent flow where flow measurement
is problematic. Calculate the Reynolds number of the flow at the measuring point with the program
Flux-Flow. Contact SebaKMT.
15.5 High Measuring Deviations
• The sound velocity of the medium is wrong. A wrong sound velocity can lead to the ultrasonic
signal reflected on the pipe wall being mistaken for the measuring signal passing the medium. The
flow calculated from the wrong signal by the UDM 200 is very small or fluctuates around zero.
• There is gas volume within the pipe. If gas flows through the pipe, the measured flow values are
always too high since both, the gas flow and the fluid flow, are measured.
• The defined upper limit of the flow velocity is too low. All measured flow velocities that are
greater than the upper limit will be ignored and marked as invalid. All quantities derived from the
flow velocity are marked as invalid, too. If several correct measured values are ignored, the
totalizer values will be too low.
• The entered cut-off flow is too high. All flow velocities below the cut-off flow are set to zero. All
derived values are set to zero as well. To measure at small flow velocities, the cut-off flow (default:
5 cm/s) must be set to an appropriate low value.
• The entered pipe roughness is inappropriate.
• The flow velocity to be measured is outside the measuring range of the transducer.
• The measuring point is not appropriate. Select another measuring point to check whether the
results are better. The cross-section of the pipe is never perfectly circular, thus influencing the flow
profile. Change the transducer position according to the pipe deformation.
86
15.6 Problems with the Totalizers
•
•
•
The totalizer values are too high:
See SPECIAL FUNCTION \ SYSTEM SETTINGS \ MEASURING \ QUANTITY RECALL. If
this menu item is activated, the totalizer values will be stored. The totalizer will take this value
at the start of the next measurement.
The totalizer values are too low:
One of the totalizers has reached the upper limit and has to be reset to zero manually.
The sum of the totalizers is not correct:
See SPECIAL FUNCTION \ SYSTEM SETTINGS \ MEASURING \ QUANT. WRAPPING.
The output sum of both totalizers is not valid after the overflow (wrapping) of one of the
totalizers.
87
16 Technical Data
UDM-200
Measuring principle
measurable media
Flow velocity
Repeatability
Resolution
Flow measurement
Accuracy
Average time
LCD display
Interface
Outputs
Internal memory capacity
Operating time
Power supply
Power consumption
Weight
Dimensions
Protection Class
Ex-Protection class
Operating temperature
Measuring cycle
Response time
Measuring functions
Physical quantities
Totalizers
Languages
Outputs
Current
Acuracy
Active output
Ultrasonic time difference correlation principle
Warm / cold water and all acoustically conductive
fluids with < 10 % gaseous or solid content in
volume
0,01 – 25 m/s
± 0.25% of reading ± 0.02m/s
0,025 cm/s
0,3 – 1.000.000 l/min
+- 1% - 3% of reading +- 0,1 m/s
0 s to 100s, adjustable
2x 16 characters, backlit
RS 232
0/4-20 mA, Impuls/Reed 48V, 100mA
>100.000 values
>24 h
100 – 240 VAC, 12 V (optional)
<15W
2,9 kg
230 x 110 x 190 mm
IP 67 (IP 68 closed)
Zone 2
-10° - 60° C
(100…1000) Hz
1s
Flow velocity, volume flow, mass flow
Volume, mass
English, German, French, Dutch, Spanish,
Danish, Norwegian, Polish (others on request)
0/4…20 mA,
0,1 % v. MW 15 ± µA
Rext < 500
Binary
Open Collector
As state output
As impuls output
Transducer
(Possible) rated pipe diameter range
Dimensions
Operating temperature
Protection Class
24 V/4 mA
Limit, sign change or error
Value: (0,01…1000) units
Width: (80…1000) ms
25…1000 mm
58 x 28 x 31 in mm (L x B x H)
-20 °C - 100 °C
IP 67 (IP68 optional)
88
17 Appendix
17.1 Serial Output Format
The parameter set is transferred at the start of the measurement, followed by the “/DATA” line and a
line containing the column headers of the following table. After that, the measured values are
transferred.
Depending on the storage interval, one data line is transferred for each enabled measuring channel
(the storage rate can be set separately for each channel). The blank line “???” is transferred if there
are no measured values for the storage interval.
Example: If the storage interval is 1 s, 10 blank lines are transferred if the measurement is restarted
after a break of 10 seconds for positioning the sensor.
The UDM 200 can transfer the data columns listed in the following table.
Column heading
Column format
Contents
Measuring channel
\*MEASURE
###000000.00
Variable selected in AUSGABEOPTIONEN
Q_POS
+00000000.00
Counter value for positive flow direction
Q NEG
-00000000.00
Counter value for negative flow direction
FQ_POS
Flow counter value for positive flow direction
FQ NEG
Flow counter value for negative flow direction
Name of other process inputs
SSPEED
Sound velocity of a medium
KNZ
Concentration in percent mass
AMP
Signal amplitude
Online output (output during the measurement)
With online output, all variables than can possibly occur during the measurement are generated in
columns. The Q_POS and Q_NEG columns remain blank if the quantity counter is not activated.
Because quantity counting cannot be activated for the flow velocity variable, no column is generated
for it.
Offline output (output of stored measured values)
With offline output, columns are only generated if there is at least one value for them in the data
record. The Q_POS and Q_NEG columns are not generated if the quantity counter was not activated.
89
17.2 Hyperterminal Transfer Parameters
To connect to the UDM 200 using Windows Hyperterminal, the following parameter settings are
required:
RS232:
Transfer rate: 9600 bits per second
8 data bits
Even parity
2 stop bits
Flow control: hardware
Select the COM port that the UDM 200 is connected to. This depends on your Windows settings – you
can find out by selecting the system setting.
Protocol (RTS/CTS) UDM 200 sends CRLF-ASCII. Maximum line length: 255 characters.
17.3 Sound Velocity of Selected Pipe and Lining Materials at 20 °C
The following table shows the sound velocity (longitudinal or transversal) of selected pipe and lining
materials at 20 °C. The values of some of these mate rials are stored in the internal database of the
device. In the column cflow, the sound velocity (longitudinal or transversal) used for flow
measurement is indicated.
Take into consideration for the measuring task that the sound velocity depends on the composition
and the processing of the material. The sound velocity of alloys and cast materials will fluctuate over a
certain range. The values give a rough orientation.
Material
ctrans
[m/s]
Aluminium
3100
Asbestos
cement
clong
[m/s]
Material
trans
Platinum
2200
trans
Bitumen
2500
Brass
2100
Steel (normal)
ctrans
[m/s]
clong
[m/s]
cflow
[m/s]
1670
trans
Polyethylene
925
trans
trans
Polystyrene
1150
trans
4300
trans
PP
2600
trans
3230
5800
trans
PVC
Copper
2260
4700
trans
PVC (hard)
948
Cu-Ni-Fe
2510
trans
PVDF
760
Ductile iron
2650
trans
Quartz glass
3515
Glass
3400
4700
trans
Rubber
1900
Grey cast iron
2650
4600
trans
Silver
1590
700
2200
long
Sintimid
1950
long
Stainless
steel
2730
long
1185
2000
Pipe
PE
Perspex
1250
PFA
Plastics
1120
6300
cflow
2395
long
trans
2050
long.
trans
2400
trans
trans
2472
long
5790
trans
Teka PEEK
2537
long
long
Tekason
2230
long
long
Titanium
5955
trans
90
3230
3067
17.4 Typical Roughness Coefficients of Pipes
The values are based on experience and measurements.
Absolute
roughness [µ
µm]
Material
drawn pipes of non-ferrous
metal, glass, plastics and light
metal
0
...
1.5
drawn steel pipes
10
...
50
bis zu
...
10
planed surface
10
...
rough-planed surface
50
welded steel pipes, new
Material
Absolute
roughness [µ
µm]
Cast iron pipes:
• bitumen lining
120
...
• new, without lining
250
...
1000
40
• rusted
1000 ...
1500
...
100
• encrusted
1500 ...
3000
50
...
100
fine-planed, polished surface
long usage, cleaned
150
...
200
lightly and evenly rusted
bis zu
...
400
heavily encrusted
bis zu
...
3,000
91
17.5 Properties of Water at 1 bar and at Saturation Pressure
T (°C)
p (bar)
ρ (kg m-3)
-1
0
1
999.8
4.218
10
1
999.7
4.192
20
1
998.3
4.182
30
1
995.7
4.178
40
1
992.3
4.178
50
1
988.0
4.181
60
1
983.2
4.184
70
1
977.7
4.190
80
1
971.6
4.196
90
1
965.2
4.205
100
1.013
958.1
4.216
120
1.985
942.9
4.245
140
3.614
925.8
4.285
160
6.181
907.3
4.339
180
10.027
886.9
4.408
200
15.55
864.7
4.497
220
23.20
840.3
4.613
240
33.48
813.6
4.769
260
46.94
784.0
4.983
280
64.20
750.5
5.290
300
85.93
712.2
5.762
320
112.89
666.9
6.565
340
146.05
610.2
8.233
360
186.75
527.5
14.58
374.15
221.20
315.5
∞
T
Medium temperature
p
Medium pressure
ρ
Density
cp
Specific heat at constant pressure
92
-1
cP (kJ kg K )