19 of 32
Jun 2001
Detectors
Agilent 6890 Gas Chromatograph Service Manual
Nitrogen Phosphorus Detector (NPD) 320
Replacement procedures
Figure 320-9 Removing the jet
Removing the electrometer
WARNING Before proceeding, turn off the oven and any heated zones and let them cool
down. Turn off any detector gases at their supply, then turn off the main
power switch and unplug the power cord.
Caution Make sure you are properly grounded with an ESD strap before continuing.
1. Remove both the electronics top cover and the right side cover.
2. Lift up the hinged detector tower cover and remove the Torx T-20 screw
and the clamp on the electrical interconnect.
Exert slight side
pressure on the nut
driver to pull the jet
from the weldment
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