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Occasionally the transfer line fused silica liner between the column and
FPD module must be inspected, cleaned, and/or replaced.
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.
3. Inside the oven, remove the column to the FPD.
Always turn the electrometer or the main power off before removing the
PMT housing to avoid destroying the tube.
4. Remove the photomultiplier tube assemblyĊor assembliesĊfrom the
detector module; also remove the filter(s). Set them in a safe place.
5. Locate the ignitor cable attached to the side of the detector (see
illustration on the next page). Trace the cable back to the printed cirĆ
cuit board and disconnect it there.
6. Remove the exhaust tubing (parts 7, 8, and 15) and the sheet metal
coverĊon the single wavelength detector, it is held by two screws on
the top and two at the bottom; on the dual wavelength detector, it is
held by two screws at the top.
7. Remove the four screws that attach the detector to the top of the oven
(one at each corner). Remove the detector from the GC.
Caution
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