Despatch LCC/LCD2-14PT-3 Pass Through Series - Manual (Page 63)

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1. Disconnect the control and high limit sensor thermocouples.
2. Connect a calibration instrument with a type J thermocouple output to the
control sensor input. Allow the control to warm up at least 30 minutes.
3. Access Setup Mode.
4. Press Page key until -100F is displayed.
5. Press Menu key until Ctrl Sens -100F is displayed.
6. With Ctrl Sens -100F displayed, adjust the calibration instrument to Type J
thermocouple, -100 degrees Fahrenheit output.
7. Wait 30 seconds. Press the key.
8. With Ctrl Sens 1400F displayed, adjust the calibration instrument to 1400
degrees Fahrenheit output (Type J thermocouple).
9. Wait 30 seconds. Press the key.
10. When the control displays Ctrl Sens Done, disconnect the calibration
instrument from the control sensor input and connect it to the high limit sensor
input. Reconnect the control sensor thermocouple.
11. Press the Menu key until HL Sens -100F is displayed.
12. With the control displaying HL Sens -100F, adjust the calibration instrument
to -100 degrees Fahrenheit output (Type J thermocouple).
13. Wait 30 seconds. Press the key.
14. With the control displaying HL Sens 1400F, adjust the calibration instrument
to 1400 degrees Fahrenheit output (Type J thermocouple).
15. Wait 30 seconds. Press the key.
16. When the control displays HL Sens Done, disconnect the calibration
instrument from the high limit sensor input. Re-connect the high limit sensor
thermocouple.
17. To skip calibration of the retransmit signal, press the Page key twice to exit the
Sensor Calibration Page.
18. To calibrate the retransmit signal, press the Menu key until RetCalLo is
displayed.
19. Connect a calibration instrument with a type J thermocouple output to the
control sensor input.
20. Connect a voltage measurement device to the retransmit output terminals.
21. Set the calibration instrument output to the temperature value of the RetOutLo
parameter from the Control Page.
22. Adjust the RetCalLo * value using the keys until the voltage measurement
device reads 1VDC.
23. Press the Menu key.
24. Set the calibration instrument output to the temperature value of the RetOutHi
parameter from the Control Page.
25. Adjust the RetCalHi * value using the keys until the voltage measurement
device reads 5VDC.
26. Press the Menu key.
27. Press the Page key to exit the Sensor Calibration Page.
28. Calibration is now complete. Disconnect the calibration instrument and voltage
measurement device (if used).
29. Verify that the control and high limit sensor thermocouples are connected.