Ametek Thermox Series 2000 WDG-IV User Manual page 142

Warnings
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Cautions
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7-2 | Thermox Series 2000 WDG-IV / IVC / IVCM
If you turn off the analyzer or the process is shut down, turn off the
aspirator air to avoid plugging problems.
The outside of the sensor cover and all sensor assembly components
are extremely hot (up to 500°F (260°C) inside the cover), even after a
considerable period from shutdown. Turn off the power to the sen-
sor and control unit when working inside the sensor. Use caution and
wear appropriate gloves when handling components.
Be extremely careful when performing maintenance on the sensor
while the process is running, especially if the process is under signifi-
cant positive pressure. Removing any part of the sensor plumbing can
allow process gases and gases of high temperature to escape into the
sensor.
Always use a backup wrench when working on sensor plumbing. This
helps to prevent damaging welds and distorting sensor plumbing.
Never use pipe dope or any other contaminant that gives off combus-
tible vapor on any joints of the sample tubing. Combustible vapor in
the sample tubing can lead to erroneous readings.