PN 9000-133-VE, Rev U
Common Operator Errors
If you follow the steps below, your analyzer will operate with a minimum of
maintenance and troubleshooting.
• Connect the air supply to the Aspirator air supply inlet but
do not turn on
the air until the analyzer is at operating temperature
. If the analyzer is
turned off or the process is shut down, the Aspirator air should be turned
off to avoid plugging problems.
• If your process is running and the analyzer is installed on the process, the
analyzer must have power applied to it to prevent plugged plumbing and
analyzer component damage. The case heaters must be on if the process is
running to maintain analyzer plumbing above 200 °C.
• Do not use pipe dope or any other contaminant that gives off combustible
vapor on any joints of the sample tubing.
• For O
2
calibration gases, do not use calibration gases to check analyzers if
they contain a mixture of oxygen and combustibles. Note, however, that
this is acceptable for combustibles span gases (used only if you purchased
the combustibles option).
• Always introduce calibration gases at the recommended flow rate of
3.0 SCFH.
• When working on the plumbing inside the analyzer cabinet, turn the
power off.
• Use caution if performing maintenance on the analyzer while the process
is running. Removing any part of the analyzer can allow process gases and
gases of high temperature to escape into the analyzer.
• Do not handle the cell excessively. Do not try to clean the cell except by
rinsing. If you need to handle the cell, grasp by touching the seal fitting 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 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.
2-4 | Thermox
®
WDG-V / VC / VCM / VM
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