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A.4 ■ Appendix Watlow Series 93
Appendix
Figure A.4 -
Calibration
Parameters.
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Before attempting to calibrate, make sure you have
the proper equipment called for in each procedure.
The Series 93 is calibrated and tested before leaving the factory.
Restoring Factory Calibration
The [`rSt] parameter restores the factory calibration values to the Series 93. If
you calibrate your controller incorrectly, you have the option to default to the
original values. Once you leave the [`CAL] menu, the values are entered.
1. Press the ¿Up-arrow/¯Down-arrow keys simultaneously for three seconds.
The LOC parameter appears in the lower display. Continue holding the
¿Up-arrow/¯Down-arrow keys until the lower display reads [`CAL].
2. Press the ¿Up-arrow key until [`YES] appears in the upper display.
3. ‰Advance through the Calibration Menu until [`rSt] appears in the lower
display.
4. Press the ¿Up-arrow key until [`YES] appears in the upper display.
5. Press the ‰Advance key and the Series 93 advances to test the displays.
6. To conclude, wait 60 seconds or press the ‰Advance key to reach the next
prompt or to exit from the CAL menu.
This procedure is used only to restore calibration, it is not meant to clear values.
Calibration Menu
[`)00] Input 0.00mV for low input.
[`5)0]
Input 50.00mV for high input.
[``tC]
Connect a Type "J" ambient compensator with inputs shorted.
[`440] Set the low resistance to 44.01Ω.
[`255] Set the high resitance to 255.42Ω.
[`)00]
Set the voltage source to 0.000 volts.
[`%00] Set the voltage source to 5.000 volts.
[`$00] Set the current source to 4.00mA
[`2)0] Set the current source to 20.00mA
[`4A0] Enter 4-20mA output calibration value for 4mA
[`2A0] Enter 4-20mA output calibration value for 20mA
[`rSt] Restores factory calibration values.
[`dSP] Test display.
[`dFL] Select SI (integral, derivative, proportional band in % of span, °C)
or US (rate, reset, proportional band in degrees or units, °F)
‰
Calibration Menu
[``NO]
[`CAL]
[`YES]
[`CAL]
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