Manual

WATLOW Series 365 User’s Manual 11
T/C Calibration
The Series 365 is calibrated and tested before leaving the factory.
Thermocouple Calibration
365X-X6XX-X000
Equipment required:
• Precision millivolt source (mV source).
• Appropriate type reference compensator with reference junction at 32°F/0°C.
Setup:
1. Wire your control for the correct line voltage. See power wiring on
Page 6, Figure 6.
2. Connect the millivolt source to the thermocouple reference compensator, and
the compensator to the thermocouple input terminals on the Series 365
(Terminals 3 and 5). See Page 7, Figure 8.
3. Make sure the heat/cool switch is in the correct position for your application.
See Page 6, Figure 5. Apply power.
4. Refer to Table 1 below for values that apply to your unit’s range code.
Range Millivolt
Code Low/High T/C Low High
Type mV mV
601 32 to 600°F/ 0 to 315°C “J” 0.000 17.186
602 32 to 1382°F/ 0 to 750°C “J” 0.000 42.283
603 32 to 2282°F/ 0 to 1250°C “K” 0.000 50.633
604 150 to 662°F/ 66 to 350°C “T” 3.711 17.816
605 -328 to 150°F/ -200 to 66°C “T” -5.603 2.711
606 32 to 2543°F/ 0 to 1395°C “Pt2” 0.000 55.246
607 32 to 2732°F/ 0 to 1500°C “S” 0.000 15.576
608 32 to 2732°F/ 0 to 1500°C “R” 0.000 17.445
Procedure:
1. Set the mV source to ______, the Low mV
value. Turn the setpot fully CCW. Adjust the
Low pot until the unit just fully de-energizes.
2. Set the mV source to ______, the High mV
value. Turn the setpot fully CW. Adjust the
High pot until the unit just fully de-energizes.
3. Repeat Steps 1 and 2 as necessary until no
further adjustment is needed.
Bottom View
High
Potentiometer
Low
Potentiometer
Table 1 -
Thermocouple Input
Calibration Values