PN 9000-280-VE, Rev B
Troubleshooting
Never service the analyzer unless power has been removed from the
analyzer, and it has been allowed to cool for at least 90 minutes. Also,
always use gloves when working on the analyzer.
General Troubleshooting
Your system may pass calibrations, yet still seem to be reading incorrect oxy-
gen levels. If this is the case, check the following:
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).
Sniffing for Leaks
For processes under vacuum you can check for leaks by sniffing the fittings
with another gas (for example, nitrogen or pure oxygen), being sure to avoid
the area over the top of the Cell.
1. Use a piece of Tygon or plastic tubing with a 1/8" stainless steel nozzle to
apply the gas from a cylinder (using stainless steel prevents any problems
that might occur with plastic melting the nozzle on hot analyzer compo-
nents).
2. Monitor the response from the Cell. When the Cell millivolt reading
changes, it indicates a leak in that area of the plumbing (the vacuum of the
process pulls in the gas).
3. If not convenient to view the AMEVision Display Unit, you can also apply a
voltmeter to the Cell terminals on the
Sensor
board labeled (
+O2-
) to see
if the Cell millivolts change, indicating a leak.
Maintenance and Troubleshooting
|
3-21
Содержание WDG-V UOP
Страница 1: ...WDG V UOP Combustion Analyzer ATEX IECEx USER MANUAL PN 9000 280 VE_Rev C...
Страница 40: ...PN 9000 280 VE Rev B Figure 2 7 Conduit Entries 2 18 Thermox WDG V UOP ATEX IECEx Analyzer...
Страница 96: ...PN 9000 280 VE Rev B WDG V UOP Series Analyzer Rating Labels 4 6 Thermox WDG V UOP ATEX IECEx Analyzer...
