Specifications

WESTLOCK CONTROLS CORPORATION
280 MIDLAND AVENUE, SADDLE BROOK, NJ 07663 TEL: [phone] FAX: [phone]
www.westlockcontrols.com
1/12/10 TECH-439/D.W.O. 19024 Page 34 of 58
Linear Positioner: The magnetic assembly supplied with the positioner should corre-
spond to the stroke length and failure direction of the actuator. To make sure you have
the appropriate magnet assembly, check the part. The stroke length and failure
direction should be printed on the part. On the older ICoT the magnet assembly is not
printed with this information, although there should be a serial number. Contact the
factory with the serial number to verify that it is correctly matched to the actuator. (See
Figure 5-1 & Figure 5-2).
5.1.5. Supply Pressure
The supply pressure should be regulated appropriately with regard to the actuator. If
there is question as to the proper supply pressure, the actuator manufacturer should
be contacted.
5.1.6. Positioner Pressure Rating
If the supply pressure is above 40 PSI a high pressure ICoT positioner must be used.
If the supply pressure is below 40 PSI a low pressure ICoT positioner must be used.
(See Ordering Guide - Section 2.1)
5.2 FAQ’s
Listed here are some FAQ’s encountered with the ICoT positioner.
5.2.1. The LCD remains blank even after power is applied to the positioner.
 Check if loop current polarity matches positioner input.
 The positioner should be given a minimum current of 3.2mA and at least 9VDC
@ 20mA. The voltage across the positioner can be checked by removing the
cover and connecting a voltmeter across TP1 and TP2 on the display board.
5.2.2. The positioner has power but the position as shown on the LCD does not
seem to match the actual position of the actuator/ valve.
 May need to be calibrated. Perform a manual step by step calibration or a full
automatic calibration (see sections 4.7 and 4.8).
 Beacon may be misoriented.
 Check if it is properly configured as linear or rotary (see section 4.8 function
“Type”).
 The flow characteristic during calibration was set to equal percentage or quick
opening, not linear. If linear is desired enter calibration and make this change
(See Calibration Instructions section 4.1 & 4.2).
.