Ametek Thermox 2000 ATEX Series User Manual page 15

Common Operator Errors
These are some common errors to avoid; if they are avoided, your analyzer
will operate with a minimum of maintenance and troubleshooting.
If your process is running and the analyzer is installed on the process,
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the analyzer must have power applied to it to prevent plugged plumb-
ing and sensor component damage. The case heaters must be on if the
process is running to maintain sensor plumbing above the process gas
dewpoint.
Do not use pipe dope or any other contaminant that gives off combus-
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tible vapor on any joints of the sample tubing.
For O
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mixture of oxygen and combustibles. Note, however, that this is ac-
ceptable for combustibles span gases (used only if you purchased the
combustibles option).
Always introduce calibration gases at the recommended flow rate.
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When working on the plumbing inside the sensor cabinet, turn the
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power off - the oxygen cell heater has exposed windings and a short to
the plumbing will blow the fuse and could damage the furnace or ther-
mocouple.
Do not handle the cell excessively. Do not try to clean the cell except by
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rinsing. If you need to handle the cell, grasp by touching the seal fit-
ting at the top; never touch the bare part of the cell.
Do not remove a cell or type "K" thermocouple that you may want to
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use again when the inside of the furnace is still hot - severe thermal
shock can be destructive to either of them.
Always replace the metal cell O-ring when replacing the oxygen cell.
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calibration gases, do not use calibration gases if they contain a
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