SITRANS LUT400
Open Channel Flow Monitor
Part 1
General
1.1
Scope
A. This section describes the requirements for an ultrasonic flow
transmitter with sensor and temperature compensation probe.
B. Under this item, the contractor shall furnish and install the
SITRANS LUT400 as indicated on the plans and as herein
specified.
1.2
Submittals
C. The following information shall be included in the submittal for
this section:
1. Data sheets and catalog literature for SITRANS
LUT400.
2. Interconnection and dimensional drawings.
3. Spare parts list and optional accessories.
Part 2
Products
2.1
Ultrasonic Flow Transmitter and Sensor
A. The flow transmitter shall be an ultrasonic microprocessor
based echo-time measuring type providing an electrical output
signal proportional to the flow rate, head, or temperature as
may be required. It shall consist of a non-contacting
transducer and a transmitter connected by shielded, twisted
pair cable.
B. Transducer
1. Operating principle:
Acoustic impulses emitted from an ultrasonic sensor
are reflected back from the liquid surface and are
received by the sensor. The transit time of pulse travel
for generation to echo is measured. This elapsed time
is proportional to the distance between the sensor and
liquid surface.
2.
Primary Sensor:
The acoustic sensor/transducer shall have polarized
zirconium crystal with acoustic impedance matching
face and transformer.
The transducer shall be approved by FM for Class I
and Class II hazardous locations. A separate
temperature probe shall be provided for temperature
compensation.
The transducer shall be a Siemens Milltronics
EchoMax model XRS-5 or other EchoMax model
3. Mounting:
A one inch NPT fitting per manufacturers
recommendations.
4. Operating Temperature:
*-40 to 150C (-40 to 300 F)
*transducer model dependent
C. Transmitter
1. Enclosure
Polycarbonate, Indoor/Outdoor
Type 4X / NEMA 4X / IP 65
2. Power Supply
AC: 100-230 V AC +/- 15%, 50/60 Hz, 36 VA (10W)
DC: 10-32 V DC, (10W)
3. Power consumption
AC: 36 VA (10W)
DC: 10W
4. Operating Temperature
-20 to 50°C (-5 to 122°F)
5. Outputs
4-20 milliamp loop with HART communications, directly
or inversely proportional to head or flow, scalable and
configurable, 600 ohms maximum in ACTIVE mode,
750 ohms maximum in PASSIVE mode, isolated
Relays: Two (2) Form A (SPST), Rated 5A at 250 V
AC, 3A at 30 V DC, One (1) Form C (SPDT), Rated 1A
at 250 V AC, non-inductive, 3A at 30 V DC
6. Communications
HART 7 on 4 – 20 mA output loop for remote
configuration and communication
USB for data log review and clearing
Local User Interface Selectable Language (English,
German, French, Spanish, Simplified Chinese)
7. Software
IBM PC compatible computer access to data and
digital echo profiles, using most standard instrument
configuration packages (SIMATIC PDM, Emerson
AMS, FDTs such as Pactware) via HART with
Electronics Device Descriptions and DTMs.
USB interface for downloading of data log to a file and
conversion of data to a text or spreadsheet format.
8. Controls
All data and operating parameters may be entered via
the local keypad or from a remote computer via the
HART or USB interface
D. Sensor and Transmitter Performance
1. Range
0.3 to 8 meters (2 to 26 feet) with EchoMax XRS5
Longer ranges available with other EchoMax models
2.
Accuracy
±1 mm plus 0.17 % of distance
High accuracy configuration: ±1 mm, within 3 m range
when used in conjunction with EchoMax XRS5 transducer
and TS-3 Temperature Sensor.
3.
Resolution
0.1% of span, or 2 mm (0.08”), whichever is greater
Milliamp loop output: ± 0.1% resolution
4.
Separation
Maximum distance of up to 365 meters (1200 feet) of cable
between electronics and transducer
E. Display
Back lit LCD, 60 x 40 mm (2.36 x 1.57"), Resolution: 240 x
160 pixels
Removable display, operational up to 5 m from enclosure
base
Capable of displaying the following:
1.
2.
3.
4.
5.
Current head in selected units
Current flow rate in selected units
Total flow in selected units
Current temperature
Max and Min temperatures
6.
7.
8.
9.
10.
Part 3
Max and Min flow rates
Relay status
Logged data
Day, Date and Time
All operational parameters
Operator Functions
3.1
Calibration
A. Calibration of the flow transmitter shall be accomplished by the
entry of all operating data through the local keypad or with a
remote computer via the HART or USB interface. Access to
the parameters shall be protected by a security code number.
B. Internal self-diagnosis shall be available to assist in
maintenance of the flow transmitter. Diagnostics shall be
accessible through the local display or HART or USB interface.
C. The flowmeter shall be capable of providing for the simulation
of head heights and correlating flow rate to ensure that
operating parameters are in accordance with the
owners/manufacturers primary element flow rate chart.
D. The flowmeter shall be capable of monitoring flow through any
primary device utilizing the ratio metric or absolute method of
calculation or by use of a customer definable flow calculation
program using a cubic spline curve.
3.2
Transmitter Function Details
A. Log data at customer selectable fixed or variable logging rates
of 1 minute to a maximum of 24 hours for a minimum of 7 days
and up to 2.2 years.
B. Log average flow rate at interval selected. In addition to flow
rate, log flow total for 24 hour period, high and low flows and
time of events, and date & time. Log format shall be ASCII or
data base manager (spread sheet compatible).
C. The flowmeter shall be capable of programming a variable rate
log to increase the log rate due to preset flow rate increases
and return to original rate when flows return to normal.
D. All data and operational parameters shall be protected to
prevent loss should a power failure occur
E. Unit shall provide for automatic restart after power is restored
without operator assistance.
Part 4
Execution
4.1
Installation
A. Follow manufacturer’s recommendation for the minimum
separation between the sensor and maximum expected liquid
level.
B. Mount the sensor to ensure a clear path to the liquid surface.
C. The sensor may be flange mounted if a stilling well is required.
D. Wiring between the sensor and transmitter shall be routed in
grounded metal conduit. Use cable type and procedures as
manufacturer’s recommendations and conforming to local
electrical codes.
Part 5
Options
5.1
SITRANS LUT400 Flow models
A. SITRANS LUT430 Pump and Flow Controller - Full suite of
advanced control functionality, open channel flow monitoring,
and basic data logging capability
B. SITRANS LUT440 High Accuracy OCM - Best performance
(rated at ±1 mm accuracy up to 3 meters), full suite of
advanced control functionality, and enhanced data logging
capability
5.2
Part 6
Related Equipment
A. A TS-3 temperature sensor for determining the temperature at
a location other than that provided by, or in conjunction with,
the ultrasonic transducer.
B. Stainless Steel sunshield
C. HART modem for remote configuration with Simatic PDM and
DTMs for FDTs
D. USB cable for data log downloading and clearing
E. Prefabricated mounting brackets for transducer mounting.
F. Easy Aimer mounting device for transducer aiming.
G. Additional instruction manuals.
Spare Parts
6.1
Recommended Spare Parts
A. Spare fuses
B. Terminal Block replacement kit
C. Spare battery
D. Spare mounting plate