Remove/Replace Fid Detector Weldment - HP 5890 SERIES II Service Manual

Remove/Replace FID Detector Weldment

HAZARDOUS VOLTAGES ARE PRESENT IN THE INSTRUMENT WHEN THE
`
POWER CORD IS CONNECTED. AVOID A POTENTIALLY DANGEROUS SHOCK
HAZARD BY DISCONNECTING THE POWER CORD BEFORE WORKING ON THE
INSTRUMENT.
FLAME IONIZATION (FID) DETECTORS USE HYDROGEN GAS AS FUEL. BE
`
SURE ALL HYDROGEN GAS IS TURNED OFF AT ITS SOURCE BEFORE
REPLACING ANY FLOW COMPONENTS.
1. Set the main power line switch to the off position.
2. Disconnect the power cable from its receptacle.
3. Allow time for the oven and heated zones to cool.
4. When the heated zones are cool, turn off all gas
supplies.
5. At the bottom of the detector(s) to be removed,
inside the column oven, remove the column
and hardware associated with the detector(s)
(liner, column/liner nuts, ferrules, makeup gas
adapter,etc.).
If an autosampler is installed, the injection
port cover will not be present.
6. Remove the injection port cover by grasping its
back edge and lifting it upward.
7. Lift the hinged top cover at its front edge,
exposing the detector area.
8. Remove the screw securing the ground
strap to the hinged top cover.
9. Remove the 1/4 inch screw and washer
securing the cover at its right side hinge
point.
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NOTE
SVC 4- 21
RED O VISIBLE
OFF
INJECTION PORT COVER
TOP COVER
LID SHAFT
1/4- INCH
SCREW
AND WASHER
ON
PRESS
HERE TO
FREE
COVER