Watlow Series 922 - Manual (Page 72)

72 WATLOW Series 922 User's Manual Appendix
T/C Calibration
5. Press the MODE key until DAS6 XXXX appears on the alphanumeric
display. Use the UP/DOWN keys to adjust the alphanumeric display to
match the reading on the DVM. Once the two readings match, press the
ENTER key.
6. Press the MODE key until CH1Z XXXX appears on the alphanumeric
display for Channel 1 [CH2Z XXXX for Channel 2]. Enter 0.00 millivolts
from the millivolt source to the reference compensator, or set the t/c
calibrator to 0
°
C/32
°
F. Allow the Series 922 to stabilize for 10 seconds,
press the ENTER key.
7. Press the MODE key until parameter CH1G XXXX for Channel 1 [CH2G
XXXX for Channel 2] appears on the alphanumeric display. Using the table
below, set the millivolt source to its appropriate setting, from the millivolt
source to the reference compensator. If you are using the t/c calibrator,
use the values in the table below. Allow the Series 922 to stabilize for
10 seconds,press ENTER.
Thermocouple Type Millivolt Source T/C Calibrator
Setting Setting
J t/c 42.283mV 1382
°
F/750
°
C
K t/c 50.633 mV 2282
°
F/1250
°
C
T t/c 17.816mV 662
°
F/350
°
C
8. Remove power from the Series 922. Remove thermocouple wires from #6
and #8 for Channel 1 [#3 and #5 for Channel 2]. Turn off the compensator.
Set DIP Switch #6 to the OFF position.