Ametek CEM/Humox, User Manual

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6-8 | Thermox CEM/Humox Analyzer
Diagnostics Checks
This section shows you how to check different sensor areas for possible problems.
See the “Error Messages” section for help on what checks you should perform
based on the error message you see. In addition, if you don’t see an error message,
yet feel your readings are inaccurate, you may also want to check the “General
Troubleshooting” section that follows. We recommend that the thermocouple mil-
livolts and cell millivolts be displayed during troubleshooting as a troubleshooting
aid (see the “Display” section in the Setup key chapter for help on how to display
these items). This information will be helpful should you need to contact the factory
for assistance. Be sure to always include your analyzer model and serial number
when calling the factory for technical support.
Diagnostic checks are broken down as follows:

Wiring Checks

Thermocouple Checks

AC Power Checks

Furnace Checks

Process Pressure Checks

Cell Checks
Exercise care when working on the sensor. Turn off power, allow the
unit to cool, and wear gloves.
Wiring Checks
Interconnecting wiring problem
Make sure all wiring connections between the control unit and the sensor are ter-
minated to the proper locations and are seated properly. This includes ensuring that
sets of wires are not reversed, and that the cable is not damaged or melted.
See the “Wiring” section in the Installation chapter for correct sensor
interconnecting wiring connections.
NOTE
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