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Malfunction or incorrect operation may be caused by:
1. Reversed polarity:
Check the wiring using Figure 3-5 as a guide. If the temperature
of the thermocouple increases while the current magnitude
decreases, the problem could caused by reversed polarity of the:
a) thermocouple wiring
b) power supply leads
c) monitor instrument
2. Loose or broken wires:
Check each terminal connection for tightness. Move each wire
back and forth and note any changes in operation.
3. Too high a load resistance in the output current loop or too low
a current rating on the power supply:
24
5
Troubleshooting Guide