Ametek Thermox CEM O2/TM, User Manual

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Maintenance and Troubleshooting | 6-5
Memory is Corrupted
This error message indicates that the control unit’s internal EEPROM
memory has been corrupted or a significantly new version of software has
been installed in the control unit. Under these conditions, the software
will reprogram the EEPROM with factory defaults. You can acknowledge
this error message by setting or reading any user-programmable value
and this will clear the message from the display. This message will not
clear by removing and then restoring power to the unit.
If you see this message, you should reset the control unit to the values
required for your application, including Setup Key, Calibrate Key, Alarm
Key and Analog Range Key settings.
Span Gas Range Error
This error message occurs if the calibration span gas does not read within
the software’s allowable limits. Once this error occurs, calibration of the
system is aborted. This message could indicate one of the following prob-
lems:

Calibration gas setup problem

Incorrect flow rates between calibration gases

Process pressure incorrectly entered

Failed cell (primary calibration should be run at this time)

Leak or plug in plumbing

Cell lead wires polarity reversed