Watlow Series 94 - Manual (Page 28)

A . 4 ■ A p p e n d i x W a t l o w S e r i e s 9 4
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 94 is calibrated and tested before it leaves the factory.
Restoring Factory Calibration
The [`rSt] Restore Factory Calibration parameter restores the factory calibra-
tion values to the Series 94. If you calibrate your control incorrectly, you have the
option to default to the original values. Once you leave the
[`CAL] menu, the val-
ues 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 simultaneously for three seconds 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 94 advances to test the displays.
This procedure is used only to restore calibration, it does not affect Setup or
Operation parameters or 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 44.01 Ω
[`255] Set the high resistance to 255.42 Ω
[`rSt] Restore factory calibration
Test display (Runs automatically)
‰
Calibration Menu
[``NO]
[`CAL] [`YES]
[`CAL]
‰
‰