Moniteur Transmitter Series IO3-0405 - Manual

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Main Drive Gear
4-20 mA Transmitter
(current unit only)
Circuit Terminal Block
Terminal Block
Calibration Instructions for Moniteur
Transmitter Series - Form IO3-0405
DESCRIPTION OF DEVICE
The Moniteur Valve Position Transmitter is an electro-
mechnical device that produces an analog output signal
representative of the angular displacement of a quarter
turn valve, or other device operating between 0 and 90
degrees.
FACTORY SETTINGS
Clockwise - to - Close operation (see fig A)
Resistive: 0 - 1k Ohms (selectable)
Current: 4mA Closed , 20mA Open
INSTALLATION
Install the Valve Position Transmitter to the
valve/actuator package. Remove the enclosure cover
and wire unit to the appropriate terminal points.
Provided power must be within the operating
specifications of the devices.
CAUTION: To reduce the risk of ignition of
hazardous atmospheres, disconnect the
device from the supply circuit before
opening. Keep assembly tightly closed
during operation.
CAUTION: Keep fingers and all objects away
from moving gears. Never cycle or move
the valve while adjusting the transmitter.
Form IO3-0405
M O N I T E U R D E V I C E S I N C O R P O R A T E D
3 6 C o m m e rc e R o a d , C e d a r G ro v e , N J 0 7 0 0 9 Te l . ( 9 7 3 ) 8 5 7 - 1 6 0 0 F a x ( 9 7 3 ) 8 5 7 - 7 2 8 9
w w w . m o n i t e u r d e v i c e s . c o m
Verify the position of the valve/actuator package to ensure that the valve is in the position where the resistive
reading will be '0' ohms. (Normally the valve closed position)
For clockwise to close operation(see fig. A) use an ohmmeter to measure resistance between terminal points 9
and 10 on the terminal strip . For counter-clockwise rotation to close, measure resistance between terminal
points 10 and 11 on the terminal strip. In this position, the meter should read "0 ohms" or slightly higher.
If the resistive output does not read near "0 ohms" then a macro adjustment must be made. This is adjusted by
by disengaging the main drive gear. Lift the large center gear slightly from the main transmitter shaft and
rotating the main gear until the desired reading is achieved. Release the main drive gear so that it re-engages
Cycle the valve/actuator package to the full open position. Reading at 90 degrees of rotation should be close to
1000 ohms +/- 20% . (Less for smaller rotations, more for larger)
Cycle the valve, re-check the output. Re-calibrate if necessary.
Calibration Procedure (Resistive Output Models)
with the main drive shaft.
Close the transmitter housing. Tighten all screws.
1.
2.
3.
4.
5.
6.
Potentiometer
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W - k c o l
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Figure A