Watlow EZ-Zone PM Express Temperature ControllerD291511.18a.fm
A-11 Appendix A: Sensors
Operations Menu Settings
Upon power up of the temperature controllers, the Advance key will scroll through the Opera-
tions Menu. Press the Infinity key to return to the default display.
1. Press the green Advance button to scroll through the menu.
2. Begin with the Autotune Menu (AUt). Use the arrow keys to select No (no). Then press
the green Advance button to move to the next setting.
3. In the Control Mode Active Menu (C.M) select Auto (AUto). Press Advance.
4. In the Heat Proportional Band Menu (h.Pb) select 14.0 ° C. Press Advance.
5. In the Cool Proportional Band Menu (C.Pb) select 14.0 ° C. Press Advance.
6. In the Time Integral Menu (ti) select 180.0. Press Advance.
7. In the Time Derivative Menu (td) select 0.0 seconds. Press Advance.
8. In the Time Base Output 1 (o.tb1) select 1 sec. (SSR & sw dc). Press Advance.
9. In the Time Base Output 2 (o.tb2) select 20.0 sec. (mech. relay & NO-ARC). Press
Advance.
10. In the Alarm Low Set Point Menu (A.L
o) the user may adjust the setting to fit their chosen
specification. Press Advance.
11. In the Alarm High Set Point Menu (A.hi) the user may adjust the setting to fit their chosen
specification. Press Advance.
10. In the Calibration Offset Menu (i.CA) select 0.0. Press Advance.
Calibration Procedure
Calibrate the temperature controllers as needed, following the steps below:
1. Measure the temperature of the seal shoe at the end of the thermocouple with a tempera-
ture probe.
2. Check to see if the temperature reading on the controller is different than that of the
probe. Calculate the difference, if any. This difference is the Calibration Offset Value.
For example, if the controller reading is 140 degrees C and the probe reading is 115
degrees C, then the Calibration Offset Value should be set at -25 degrees C.
3. To adjust the Calibration Offset value, press the green Advance Key to scroll through in
the Operation Menu screens until i.CA is displayed.
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