Detectors
6850
6850
Released: April 2004 6850 Series Gas Chromatograph Service Procedures 180
9. Inspect the windows: chips, scratches,
cracks or fogging in the light path scatter
light, reducing sensitivity. Replace windows
if necessary.
10. Reassemble the parts in reverse order,
making sure all seals are of the proper type
and in their proper locations. Tighten screws
evenly and firmly to ensure gas- and light-
tight seals. If the filter has a silvered side, it
should face the flame (indicator arrows >
on edge of filter should point toward the
PMT).
Jet
If a response problem is encountered (sensitivity,
noise, selectivity) the FPD jet should be
inspected for deposits and, if necessary, cleaned
or replaced. To properly service the jet, the
detector module should be removed from the
instrument, followed by appropriate service:
1. Turn off power to the gas chromatograph
and disconnect the main power cord. Remove
the detector covers.
2. Allow time for heated zones to cool to safe
temperatures.
Caution
Always turn the electrometer or the main
power off before removing the PMT housing
to avoid destroying the tube.
To Next Page
Loading...
Need help?
General
