Specifications

WESTLOCK CONTROLS CORPORATION
280 MIDLAND AVENUE, SADDLE BROOK, NJ 07663 TEL: 201-794-7650 FAX: 201-794-0913
www.westlockcontrols.com
1/12/10 TECH-439/D.W.O. 19024 Page 56 of 58
Appendix I
Procedure to Reset the Non-Volatile Memory to Factory Settings
The ICoT positioner is a digital device. Its operation relies on data that is stored in the posi-
tioner’s non-volatile memory. Calibration and configuration data that has been established
during the positioner’s calibration is stored in this memory. Under abnormal conditions this
stored information can become corrupted. If this occurs it is necessary to reset the memory
and re-calibrate the positioner.
1. Remove power from the positioner. This can be done by removing the plug-in style
terminal strip.
2. Press and hold the CAL button while replacing the terminal strip (returning power). The
LCD will show “Starting Up…” for several seconds while holding down the CAL button.
3. Continue to hold the CAL button until the LCD shows “Factory Default Initialization.
No?” When this statement appears release the CAL button and use the down arrow to
select “Yes” or press once more to select “All”. Then press the CAL button to begin the
factory default procedure.
a. “Yes” option resets all non-volatile data to default with exception of the position
transmitter calibration data.
b. “All” option resets all non-volatile memory contents including all factory and user
calibration data.
4. After a few seconds you will be prompted to enter 4.0 mA to calibrate the loop current
input. Change the current input to the positioner to exactly 4.0 mA and press the CAL
button. If your zero position signal is other than exactly 4.0 mA then use the Up/Down
arrow buttons to adjust the value shown on the positioner’s LCD to match the zero
position mA and press the CAL button.
5. You will then be prompted to enter 20 mA. Change the current input to the positioner to
exactly 20.0 mA and press the CAL button. If your full-scale position signal is other then
exactly 20.0 mA then use the Up/Down arrow buttons to adjust the value shown on the
positioner’s LCD to match the full-scale position mA and press the CAL button.
6. The positioner will automatically return to normal operating mode.
It is recommended then to follow the normal calibration procedure as described in the manual
section 4.7.