Ametek WDG-V, User Manual

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PN 9000-133-VE, Rev U
Never use pipe dope or any other contaminant that gives off a com-
bustible vapor on any joints of the sample tubing. Combustible vapor
in the sample tubing can lead to erroneous readings.
The outside of the analyzer cover and all analyzer assembly compo-
nents are hot during normal operation (up to 260 °C/500 °F inside
the cover), even after a considerable period following shut-down.
Allow analyzer components to cool for at least 90 minutes before
working inside the analyzer. Use caution and wear appropriate
gloves when handling components or when touching the analyzer
cover.
Be extremely careful when performing maintenance on the analyzer
while the process is running, especially if the process is under signifi-
cant positive pressure. Removing any part of the analyzer plumbing
can allow process gases and gases of high temperature to escape into
the analyzer.
General Troubleshooting
Your system may pass calibrations, yet still seem to be reading incorrect oxy-
gen levels. If this is the case, you may want to check the following:
Aspirator Air Not Pulling Sample From Process
The aspirator will need cleaned or replaced. To clean the restriction try blow-
ing it out with high pressure instrument air. If this doesn’t work try soaking the
aspirator overnight in 20 % horticulture vinegar. Otherwise the aspirator will
have to be replaced.
Leak Check
Leaks can lead to inaccurate readings, especially if operating under a signifi-
cant pressure or vacuum.
• Check that all compression fitting and pipe thread connections are
leak tight.
• Be sure that the mounting plate or mounting flange gasket on the rear of
the analyzer is in place (see “Installing the Analyzer” in Chapter 2 for details
on the placement of the gasket).
3-12 | Thermox
®
WDG-V / VC / VCM / VM