User guide

Protocol Plus Owner’s Manual OPERATION
Version 2 41
Copyright © 2010 by Despatch Industries.
All rights reserved. No part of the contents of this manual may be reproduced, copied or transmitted in any form or by any
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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 until Sensor Cal displays.
5. Press Menu key until Sensor Cal -100F displays.
6. With Ctrl Sens -100F displayed, adjust the calibration instrument to Type J
thermocouple, -100 degrees Fahrenheit output.
7. Wait 30 seconds. Press ▲.
8. With Ctrl Sens 1400F displayed, adjust the calibration instrument to 1400 degrees
Fahrenheit output (Type J thermocouple).
9. Wait 30 seconds. Press ▲.
10. When Ctrl Sens Done displays, 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 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 ▲.
14. With the control displays HL Sens 1400F, adjust the calibration instrument to 1400
degrees Fahrenheit output (Type J thermocouple).
15. Wait 30 seconds. Press ▲.
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 Page twice to exit the Sensor
Calibration Page.
18. To calibrate the retransmit signal, press Menu until RetCalLo displays.
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
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23. Press Menu.
value by pressing ▲ or ▼ to change the value until the voltage
measurement device reads 1VDC.
24. Set the calibration instrument output to the temperature value of the RetOutHi
parameter from the Control Page.
25. Adjust the RetCalHi
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by pressing ▲ or ▼ to change the value of the voltage
measurement device to reads 5VDC.
26. Press Menu.
27. Press Page to exit the Sensor Calibration Page.
28. Calibration is now complete. Disconnect the calibration instrument and voltage
measurement device (if used).
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The “RetCalLo” and “RetCalHi” values are only change indicators. The actual value is not meaningful.