Intelligent Transmitter
Models iT100, iT200, iT100M and iT200M
Operating guide
WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR CONDENSING MOISTURE.
Safety section
The iT Series Intelligent Transmitter modules can be safely operated when the instructions in this
manual are carefully followed.
This section summarizes the safety considerations. Reminders, in the form described below, will
appear in the detailed instructions to assure operator awareness of these safety considerations.
Qualified personnel should operate and maintain this equipment only after becoming thoroughly
familiar with this manual.
WARNING:This symbol is used in the instruction manual where operator safety
must be considered. The instruction manual should be consulted and read
carefully.
CAUTION: This symbol is used when caution is needed to prevent damage to
equipment. It is used where careful attention to certain procedures described in
the instruction manual is needed. This symbol is also used to emphasize
procedures other than normal operating procedures.
Safety summary
1. Ensure that any power connection neutral (green) wires are properly grounded to a good earth
ground.
2. Disconnect the AC mains power for the DC power supply used to power the transmitter
module at its source before connecting or removing any cables.
3. All cabling and wiring installation and connection should be completed prior to energizing the
modules. Inspect for frayed or cut cables prior to operation.
4. Do not expose this equipment to rain or moisture.
5. Use common sense and avoid haste!
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Contents
Safety section ...................................................................................................... 2
Safety summary ................................................................................................... 2
1.0 Theory of operation ....................................................................................... 4
1.1 Root mean square (rms) ............................................................................. 4
1.2 Peak (actually “equivalent” peak)................................................................. 5
1.3 True peak..................................................................................................... 5
1.4 True peak-to-peak........................................................................................ 5
1.5 Response and decay times for true peak and peak-to-peak detection ........ 6
1.6 Application of each detection type ............................................................... 6
2.0 Product description ....................................................................................... 7
2.1 Front panel................................................................................................... 7
2.2 Side panels .................................................................................................. 8
3.0 Installation...................................................................................................... 9
3.1 Mounting and removal ................................................................................. 9
3.2 Wiring........................................................................................................... 9
4.0 Operation...................................................................................................... 10
4.1 Changing the sensor powering .................................................................. 11
4.2 Changing the filter set-points ..................................................................... 11
4.3 Changing the source of the input sensor signal ......................................... 12
4.4 Changing the buffered dynamic output coupling ........................................ 12
5.0 Maintenance.................................................................................................. 12
6.0 Technical assistance ................................................................................... 13
7.1 Technical assistance.................................................................................. 13
7.2 Customer service ....................................................................................... 13
Appendix A, iT Series model numbers ............................................................... 14
Appendix B, Circuit board component location drawing ..................................... 15
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1.0 Theory of operation
The iT Series of vibration transmitter modules operate from a 24 Volt DC (nominal) power supply.
They accept input signal directly from integrated electronics piezoelectric (IEPE) sensors such as
accelerometers and piezovelocity transducers (PVT™). The module then processes the signal
and produces an output 4-20 mA loop current proportional to the overall vibration in terms of rootmean-squared (rms) vibration level or peak (pseudo-peak) vibration levels. The input dynamic
vibration signal is also buffered within the module and presented as an output at the front panel
BNC and on a set of terminals. The 4-20 mA loop output signal is usually wired to a
Programmable Logic Controller (PLC) or a Distributed Control System (DCS).
The module has two inputs and two outputs. The two inputs are power and the dynamic vibration
signal. The two outputs are the buffered dynamic vibration and the 4-20 process loop signal.
Acceleration, velocity, and displacement are vibration measurements that are all related by wellknown equations. Acceleration can be integrated to produce velocity. Velocity can be integrated
to produce displacement. Any one of these signals can be converted to any other. The iT Series
transmitter modules can integrate the input signal once to produce another vibrational quantity.
IEPE accelerometer signals can be processed to produce an acceleration 4-20 mA loop signal or
can be integrated to produce a velocity 4-20 mA loop signal depending upon the particular model
ordered.
A vibration transducer that can interface with the plant DCS or PLC offers the possibility to trend
the vibration of machinery. Simple knowledge of the trend of vibration can provide valuable clues
to changes in the mechanical health of equipment. The iT Series of vibration transmitter modules
allow operating personnel the ability to see the equipment vibration levels on a continuing basis.
Vibration analysts can use the overall trend information to learn when vibration levels changed
and whether it may be related to other equipment changes.
1.1 Root-mean-square (rms)
Root-mean-square detection is a very accurate method of determining the
total “power” contained in a signal. It is used in vibration detection where it is
desired to know the total amount of true vibrational energy exhibited by a
machine. Extracting the true rms value of a signal has always been difficult to
perform as complicated analog circuitry must be employed. However, the
Wilcoxon iT Series of transmitters use modern digital signal processing to
extract the true rms value of vibration.
Since the iT Series of transmitters can process signals as low as 0.3 Hz in
acceleration, the module averages the rms signal over a period of time to
produce an accurate rendition of the true rms vibration level. The averager
has the effect delaying the true rms level until an adequate number of
averages have been processed. This effect is observed as an exponentially
rising level when a “step” input of vibration is captured. In the illustration of a
captured step sine input, the effective time-constant of the averager can be
observed as about 1 second, (ref fig 1.1.1)
When a signal is removed from the iT Series transmitter, a similar effect is
observed due to the effect of averaging. However, the decay of the output
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Figure 1.1.1 - Response of rms averager
to step signal input and cut-off
signal is much slower than the rise of the output when the signal was applied. This illustrates how
the averager responds faster when the signal is applied, but slower when it is removed. These
two averager time-constants are different.
The averager has a time-constant of about 1 second for signal onset, but is about 3 seconds
when the signal is removed. The onset time is referred to as the “attack” time of the averager.
While the dropping of the signal output after the input has been removed is referred to as the
“decay” time of the averager. The Wilcoxon iT-series transmitters can thus be seen as having a
“fast attack” and a “slow decay.”
If a very short impulse for transient, like a “spike” of vibration, is applied an iTseries transmitter with rms detection, there will be no detectable change in the
output because the total energy in the spike will be miniscule, (ref fig 1.1.2)
The property of the rms averaging that is performed is beneficial for transmitter
users. This allows for the transmitter to respond rapidly to any meaningful
increases in vibration while retaining the vibration data longer when the levels
decrease to allow for the DCS/PLC system to capture the vibration level.
1.2 Peak (actually “equivalent” peak)
Figure 1.1.2 - Response of rms
averager to a transient
Peak detection has been used for vibration monitoring where it is desired to know
the peak value of the vibration. Many vibration transmitters on the market use an
rms method of detection and then covert that value to “peak” by multiplying the rms
by the square-root of two (~1.414). The ratio of the peak amplitude of a sinusoidal
wave to the rms of a sinusoidal wave is the square-root of two. This method of
extracting a vibration value the relationship between peak and rms is only true
where the signal is a sinusoidal waveform. In many instances, vibrational energy is
primarily due to a single high-level vibration, so this method works well.
Figure 1.2 - Relationship of rms to
Many vibration transmitters develop a peak value for vibration by using this method. peak of a sine waveform
The Wilcoxon iT Series transmitters have this method available for detection to
provide comparable results to other vibration transmitter modules in use. It is also useful where
users simply wish to have the signal output be in terms of peak vibration, rather than rms.
1.3 True peak
In the true peak detection of the Wilcoxon iT Series transmitters, the power of digital signal
processing is used to capture and extract the true peak value of the signal. Even very short
transient signals will not escape detection. The transmitter will capture and adjust the 4-20 mA
loop output current very quickly to reflect any short-duration transient increases in the vibration.
1.4 True peak-to-peak
Just as in the true peak method of detection, the true peak-to-peak method relies on the powerful
digital signal processing of the iT Series transmitters to capture, in near-instantaneous time, the
true peak-to-peak value of the vibration signal.
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1.5 Response and decay times for true peak and peak-to-peak detection
With the true peak and the true peak-to-peak detection, the response of the transmitter module is
near-instantaneous. Data is shown here to illustrate the rapid response of the transmitter to
transient events that would otherwise be missed by most vibration transmitters.
On the left of the illustration, (fig 1.5) is captured the response of the module output when the
input is presented with a very short-duration pulse (spike). Here the pulse is less than a
millisecond in duration, yet the module captures the level and, within 10 milliseconds, has
computed the peak value and adjusted the loop output current to that peak level.
This response can be
contrasted easily to the
response of rms detection
presented in the
explanation of the rms
detection method. Rootmean-square detection
will not respond to the
spike while the true peak
detection will respond
almost instantaneously to
the spike.
The right side of the
illustration shows the
Figure 1.5 - Data showing the fast response of the true peak and true peak-to-peak
module’s response after
detection in all iT transmitter modules. Also shown is the decay response after the
detection of the true peak signal. This allows DCS/PLC systems to capture accurate
the capture of the true
date even when their sampling is at one sample per second.
peak level. When the
signal is removed, the
output loop current remains at the captured peak level for one second. This allows for the typical
DCS/PLC system scanning at one sample per second to be able to accurately record the peak of
the signal. If no additional peaks appear at that level, or higher, the output begins to ramp down at
a rate of 25% of full-scale per second. If no further signals appear, the output will return to 4 mA
four (4) seconds after the beginning of the ramp-down.
1.6 Application of each detection type
The rms and peak detection output types are typically used for long-term overall vibration level
trending and machinery protection applications. Their insensitivity to brief spikes of vibration is
beneficial as the Wilcoxon transmitters will act to smooth the signal response. The “fast attack” of
the averager serves to respond relatively quickly to sudden increases of the overall vibration level,
but not so quickly as to cause monitoring system trends to appear noisy or erratic.
The choice of rms versus peak detection is usually a matter of user preference. Since both work
from the same basic detection method, the choice is more about the local plant personnel’s
preference for one or the other. Additionally, historical vibration data may be in terms of either rms
or peak vibration and, therefore, the setting of vibration limits will be more in line with the plant’s
historical data.
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The “true” peak or peak-to-peak detection will be of more use where it is desired to be able to
capture transient vibration events. It can also be useful when used in concert with another
transmitter module that is trending the rms levels of vibration. If a true peak vibration trend is
showing a more erratic response, but the rms trend remains relatively constant, there may be
problems developing where loose parts are causing transient impact events.
2.0 Product description
The iT Series of vibration transmitter modules perform acquisition and processing of dynamic
vibration signals. The input signal is derived from an IEPE piezoelectric accelerometer or
PVT™ piezovelocity transducer. The module has two types of output signals. First, the
dynamic vibration signal is buffered and presented at the front panel BNC connector as well
as a set of terminals on the module. Second, the 4-20 mA loop output is a processed signal
that represents either the overall rms level of vibration or the peak vibration level as described
in section 1.
Figure 2.0 front view
The module can have high-pass and low-pass filters inserted before the rms processing occurs.
These filters can be specified when the module is ordered or set in the field by placing the
module filter selection into the "manual" mode. In "manual set" mode the filters are variable; the
high-pass: 2 Hz to 1 kHz, the low-pass: 200 Hz to 20 kHz, (ref fig 2.0).
2.1 Front panel
Dynamic signal output BNC The buffered dynamic signal is available at the BNC connector. The
signal sensitivity is the same as for the sensor connected to the input and is in phase with the
input signal, (ref fig 2.1.1).
Green "ready" LED
"On" indicates power applied
"Off" indicates no power applied
"Flashing" indicates sensor BOV out of range
Red "status" LED
"Flashing" indicates a normal operating condition
"On" indicates an error condition caused by high vibration signal clipping or internal
circuit failure
The connection terminals are located above and below the front panel. These are 3-wire plug-in
terminals. The front panel has identification for each terminal connection. The connection
designation and function of each of the connection points is as follows, (ref fig 2.1.2):
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Figure 2.1.1 Front panel
Figure 2.1.2 3-wire plug for
input connection
Plug 1
Plug 2
Designation
Description
+24V
Positive power input for iT module
COM
Common for power input
GND
Earth ground connection (to ground iT module)
XDU+
Sensor power/signal input
XDU-
Sensor common input
SHD
Plug 3
Sensor shield wiring termination
DYN OUT
Dynamic signal out
COM
Common of dynamic signal out
SHD
Plug 4
see note
see note
4-20
COM
SHD
Shield point termination for dynamic out
4-20 mA Loop return signal
Common reference for 4-20 mA return
see note
Shield point termination for loop wiring
Note: Each of the terminals designated "SHD" for shielding termination connects directly to the
module ground "GND" connection.
CAUTION:Use care when terminating shields at the iT Series module. Undesired
ground loops may result if improper shield and ground connections are created.
All wiring shields should only be connected to ground at one end. Connecting
wiring shields to ground at both ends of a cable will create a ground loop
condition.
2.2 Side panels
Figure 2.2
Left side label
Right side label
The sides of the iT Series modules have no electrical or mechanical connections. The label on the
right side is a guide to the connection wiring. The left side label contains information about the
model number and identification data, (ref fig 2.2):
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Model1
Serial #
Tracking #
-3dB low frequency1
-3dB high frequency1
Input Type1
the
Input Sensitivity1
4-20 mA Output Type1
4-20 mA Full Scale Range1
Operator
Base model numbers as identified on the iT Series data sheet.
Defines the input type, output type, and processing detection type
A Wilcoxon assigned unique identification number
A Wilcoxon internal processing number
This is the pre-set frequency specified when the module is ordered
(High-Pass)
This is the pre-set frequency specified when the module is ordered
(Low-Pass)
Accelerometer or PiezoVelocity transducer (PVT™) specified in
original order
MilliVolts/engineering unit (EU), where EU is in g's or inches per
second (ips), specified when the module is ordered
Acceleration, velocity, or displacement
A designator of the full scale 4-20 mA output, in engineering units
A Wilcoxon-assigned tracking number
3.0 Installation
3.1 Mounting and removal
The iT Series of modules mount to a standard 35 mm DIN rail. The rear
of the module has a clip that is spring-loaded. This clip holds the module
securely in place. The clip releases by using a flat-bladed screwdriver
inserted into the bottom slit of the clip to pull and release the clip
attachment to the lower DIN rail.
The module can be installed by placing the upper "hook" of the mount
onto the DIN rail and gently "rocking" it into place until the latch "catches"
on the lower rail.
Removal requires a small, flat-bladed screwdriver. The blade must be
less than ¼ inch (6mm) in width to fit into the slot on the latch. Insert the
blade into the slot and gently "pry" the latch down until it releases from
the DIN rail, then lift the module releasing it from the DIN rail, (ref fig 3.1).
Figure 3.1 - Illustration of attachment clips
and installation and removal method
Note:The user should disconnect the plugs from the module before removing the module from the
DIN rail. All plug wiring should be well marked to assure proper connections when the module is
re-installed.
Each module is 17.5 mm wide and therefore uses 17.5 mm of DIN rail length.
3.2 Wiring
The iT Series modules are designed to directly accept and power IEPE type sensors. Most
industrial accelerometers and PVT™'s are IEPE type of devices. The label on the right side of the
module illustrates the wiring of the iT Series modules.
1
See Appendix A of this manual for the model number designators used in ordering
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A 24-Volt DC, nominal, supply voltage should be used to power the iT Series modules. The power
supply positive (+) output connects to the “+24V” terminal. The power supply common (-) output
connects to the “COM” terminal next to the “+24V” connection on the same plug. A good earth
ground should connect to the “GND” terminal of the power plug. This insures the proper safety
operation of the transmitter module.
Note: All shield (SHD) terminations are internally connected to the ground (GND) terminal.
The input sensor should be wired using one of these Wilcoxon connector
types: R6, R6W, R6QI, R6QAI, or R6SLI. These are all two-pin MIL-C5015 style connectors used with the typical industrial accelerometer or
PVT™. These connector types all have the shield isolated from the sensor
shell at the sensor's end of the cable as illustrated here. Wiring the sensor
in this manner will insure that no ground loops are created due to sensor
wiring. The sensor “A” pin is normally the power/signal connection and
should be wired to the “XDU+” labeled input terminal. The “B” pin is
normally the sensor common connection and should be wired to the
“XDU−” labeled input terminal. The “SHD” terminal of the sensor
connector is for connecting the shield of the sensor wire. Do not make this
connection if the sensor end of the cable has the shield grounded.
Note: Verify all sensor connections with the sensor manufacturer by
reference to the data sheet for any sensor used with the iT Series module.
The output 4-20 mA loop wiring should use shielded, twisted pair wire.
The shield for that wiring should not have the shield connected at the
module end of the wire. The illustration above depicts the wiring. This is
the recommended practice because most PLC or DCS system inputs
have shields tied to ground at the PLC/DCS input wiring.
Note: Use care when terminating shields at the iT Series module.
Figure 3.2 - Illustration of the wiring
connections and example wiring for
an IEPE sensor and 4-20 mA loop
Undesired ground loops may be created if improper shield and ground connections are created.
All wiring shields should only be connected to ground at one end of the cable. Connecting wiring
shields to ground at both ends of a cable will create a ground loop condition.
4.0 Operation
When power is applied to the iT Series module it may require up to 120 seconds to warm up and
stabilize. Once the transmitter module has achieved stable and proper operation, the green front
panel LED will illuminate to indicate the transmitter is ready. If the green LED extinguishes, it
indicates the module has lost power. If the green LED is “flashing” it indicates that the bias output
voltage (BOV) of the attached IEPE accelerometer or PVT™ is either below 5 Volts DC or above
18 Volts DC. 4-20 mA output, may be below 4 mA or above 20 mA if the iT module senses bad
sensor BOV, to activate an alarm condition.
The red front panel LED will “strobe” every two (2) seconds during normal operation. If the red
LED is on for an extended time (not the brief “strobe” flash), it indicates a module fault condition
or sensor overload condition. A sensor overload means the sensor may be operating with
97015 rev D.1 8/08
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excessive vibration causing its internal amplifier to clip the signal yielding false vibration readings.
The clip indication will keep the LED illuminated for 4 seconds after the clipping occurs.
The 4-20 mA loop output current will be established 120 seconds after power has been
applied to the module.
There are jumpers located on the internal circuit board to allow the user to make
changes to the configuration of the Intelligent Transmitter module. Opening the
Intelligent Transmitter module case can access these jumpers. Each jumper location
has three pins on the circuit board. The jumper is used to connect between two of the
pins. The diagram illustrates how the jumper can be removed from one position and
relocated to change the setting.
Appendix B has a diagram showing the circuit board layout and labeling. Each jumper
location is identified and the board has the designation on it for the jumper definition.
Figure 4.0 - Move jumper
to change setting
HALF
4.1 Changing the sensor powering
3.6 mA HALF
Note: Appendix B has a diagram of the component locations on the iT module circuit
board discussed in this section.
The sensor power is set to supply 3.6 mA to the IEPE-style sensor input using a
constant-current diode (CCD). An internal jumper plug can be changed that would
eliminate the CCD powering and allow for the input signal to be applied directly to the
module input.
Near the front of the module board is a jumper with two positions. They are marked as
“3.6mA” and “HALF.” In the “3.6mA” position, the CCD is in the circuit to provide the
constant-current diode powering to any IEPE-style sensor connected to the input.
In the “HALF” position, the input is weakly biased by two resistors to half the power
supply voltage. The “HALF” position allows AC-coupled input signals and low-impedance
DC-coupled input signals.
3.6 mA
3.6 mA HALF
Figure 4.1 - Jumper positions
for 3.6 mA powering or “Half”
voltage bias
DEFAULT
MAN DEFAULT
MAN
4.2 Changing the filter set-points
The iT Series modules are ordered with pre-programmed filter set points.
Note: Appendix B has a diagram of the component locations on the iT module circuit
board discussed in this section.
MAN DEFAULT
Figure 4.2.1 - Jumper
positions for setting filters
manually
Users can change the filter corner frequency for both the high-pass and low-pass filter
by using internal adjustable resistors. There is an internal jumper that is set to the
“DEFAULT” position when the module is shipped. Moving the jumper to the “MAN”
position places the iT Series module in the manual adjust mode. The resistors are
marked as “HPF” for the high-pass filter and “LPF” for the low-pass filter. The resistors
can be adjusted to change the filter frequencies between 2 Hz and 1000 Hz for the
high-pass filter, and 200 Hz to 20,000 Hz for the low-pass filter.
Figure 4.2.2 - Guide to
approximate potentiometer
frequency setpoints
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An approximation of the frequency potentiometer positions for various selections is presented
here in figure 4.2.2. If precise frequency control is necessary for the manually adjusted
potentiometers, users will need to have an iT500 Series or iT700 Series communication module
attached to the iT Series vibration transmitter module to view the exact frequency settings. Once
connected to the iT501, the configuration tab can be selected in the VibeLink® software of the
iT501 to view the frequency setting of the potentiometer.
More details regarding this can be found in the operating guide of the iT501. The iT501 operating
guide is also available on-line at www.wilcoxon.com.
4.3 Changing the source of the input sensor signal
The iT Series modules have a set of jumpers labeled J11, J12, and J14. These jumpers must all
be set to the same relative position. The modules are shipped from Wilcoxon with the jumpers set
to the “SENSOR” position. In the “SENSOR” position, the input terminal connector at the front of
the module (SHD, XDU-, XDU+) is the source for the sensor input signal connection.
Note: Appendix B has a diagram of the component locations on the iT module
circuit board discussed in this section.
Users may change the source for the analog sensor input signal to be the T-Bus
connector sensor connection by changing all three jumpers to the “TBUS” position.
The T-Bus connector is located at the rear of the module and allows the
interconnection of the transmitter module with other modules in the iT Series family.
The T-Bus connection is useful when users desire to connect one sensor to multiple
transmitter modules. This type of operation would allow the single sensor to be
processed through more than one set of filters or to allow for both an acceleration 420 mA signal and a velocity 4-20 mA signal from the one sensor.
SENSOR
TBUS SENSOR
TBUS
TBUS SENSOR
Figure 4.3 - Jumper positions for
changing sensor signal source
4.4 Changing the Buffered Dynamic Output Coupling
The iT Series modules have the input sensor signal buffered through an amplifier
and presented at three output positions. The dynamic output is available at the
front-panel BNC, the module lower terminal connector (DYN OUT, COM, SHD), and
the T-Bus connector. The modules are shipped from Wilcoxon with the jumper set
to the “AC” position. In the “AC” position, the buffered dynamic output signal is AC
coupled to the output through a capacitor. The AC-coupled output signal has no DC
voltage bias.
Note: Appendix B has a diagram of the component locations on the iT module
circuit board discussed in this section.
AC
DYN DC AC
DC
DYN DC AC
Figure 4.4 - Jumper selections
for output signal coupling
When the jumper is moved to the “DC” position, the dynamic output signal will be an
AC signal “riding” on a DC voltage level of ½ the power supply voltage. With a nominal supply
voltage of 24 VDC the output bias would be 12 Volts DC.
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5.0 Maintenance
The only maintenance that can be performed on the iT Series module is the replacement of the
0.5 Ampere, fast-blow, 8AG-style fuse. It is mounted in a snap-out fuse holder on the circuit
board. Additional fuses can be ordered from Wilcoxon as part number A69356, or from
distributors such as DigiKey as part number F602-ND.
6.0 Technical assistance
6.1 Technical assistance
For technical assistance, please contact Wilcoxon’s Product Manager at 301-330-8811, fax to
301-330-8873, or email to techasst@wilcoxon.com.
6.2 Customer service
To obtain a return materials authorization (RMA) number, please contact customer service at 301330-8811, or fax to 301-330-8873.
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Appendix A
iT-series model numbers, for reference only. See Wilcoxon specification
documents 98881 and 98923 for up-to-date model information.
IT-F-S-L.-H
ITM-F-S-L.-H
IT
Model designator
Notes:
1
2
st
1 digit
Input Signal Type
1 = Acceleration
2 = PiezoVelocity™
2nd Digit
3rd digit
Output Signal Type
1
1 = Acceleration
2 = Velocity
2
3 = Displacement
Optional letter
Detection Type
1 = Peak (equivalent)
2 = True R.M.S.
3 = True Peak
4 = True Peak-to-Peak
Calibration Units
“blank” = English
M = Metric
Acceleration output only valid with acceleration input
Displacement output only valid with velocity input
F digits
Full-scale output
02
05
10
15
20
25
30
40
50
75
99
Acceleration
English version
Velocity
Displacement
5g
10 g
0.5 in/sec
1.0 in/sec
20 g
2.0 in/sec
Acceleration
Metric version
Velocity
Displacement
0.2 mm
0.5 mm
1.0 mm
2
10 mils
20 mils
25 mils
50 m/sec
2
100 m/sec
200 m/sec
2
2.0 mm
25 mm/sec
30 g
3.0 in/sec
300 m/sec
2
50 g
5.0 in/sec
500 m/sec
2
S digits
Sensitivity of Input Sensor
010
100
102
500
510
0000.3
0001.0
0002.0
0005.0
0010.0
0020.0
0030.0
0050.0
0080.0
0100.0
0200.0
0500.0
English version
Metric version
100 mils
English version
Acceleration
PiezoVelocity™
50 mm/sec
3.0 mm
4.0 mm
5.0 mm
100 mm/sec
Metric version
Acceleration
PiezoVelocity™
2
10 mV/g
100 mV/g
10 mV/in/sec
100 mV/in/sec
1.02 mV/m/sec
2
10.2 mV/m/sec
500 mV/g
500 mV/in/sec
51.0 mV/m/sec
2
0.39 mV/mm/sec
3.9 mV/mm/sec
4.0 mV/mm/sec
19.7 mV/mm/sec
20.0 mV/mm/sec
L. H, Low frequency and high frequency filter selections
L - Low frequency (high-pass) filter
H - High frequency (low-pass) filter
0.3 Hz, Acceleration output only
200 Hz
00200
300 Hz
1.0 Hz, Lowest Vel. Or Displ., ≥S500 sensitivity
00300
500 Hz
2.0 Hz, Lowest Vel. Or Displ., ≥S100 sensitivity
00500
5 Hz
800 Hz
00800
10 Hz
1,000 Hz
01000
20 Hz
2,000 Hz, maximum filter for displacement output
02000
30 Hz
3,000 Hz
03000
50 Hz
5,000 Hz, maximum filter for velocity output
05000
80 Hz
10000 10,000 Hz, maximum filter for True Peak or Pk-to-Pk
100 Hz
20000 20,000 Hz, No filtering, acceleration output only
200 Hz
500 Hz
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0800.0
1000.0
800 Hz
1000 Hz
Appendix B
Internal jumper positions
Use proper procedures when making any modifications that require opening the iT-series case.
Avoid static-producing activities such as walking or personal radio use. Discharge any personal
static charge build-up by touching a good earth ground prior to handling exposed circuit boards.
The circuit board of the module can be released for removal by gently depressing the two small
tabs that are located at the upper and lower side of the module case as shown in Figure B1.
Use care when re-inserting the board into the case after any board changes that the TBUS tabs
at the rear of the circuit board align with the rear case “cut-out” that allows connections to the
circuit board. Insure that the two tabs engage and "lock" the board into place before returning
the module to service.
Circuit board component locations for jumpers, frequency adjustment resistors, and fuse are
identified in Figure B2.
Figure B2 - Location and Identification of circuit board jumpers, filter potentiometers, and fuse
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Figure B1 - Releasing
tabs to open the case