SVC 4-87
REPLACING A DETECTOR PCB
Remove/Replace Detector PCB
` 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), NITROGEN PHOSPHOROUS (NPD), AND FLAME
PHOTOMETRIC (FPD) 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. Turn off all gas supplies.
4. Lift the hinged top cover at its front edge,
exposing the detector area.
5. Remove the electronics carrier top cover.
6. Remove the right side panel by
removing four screws: two each
along its top and bottom edges.
7. Lift the hinged top cover at its front edge, exposing the detector area. (If an FPD detector is
installed, it will be necessary to remove the FPD cover by removing the thumbscrew securing it
to the hinged top cover.)
OFF ON
RED O VISIBLE
ELECTRONICS
CARRIER TOP
COVER
SCREWS
SCREWS
RIGHT SIDE PANEL
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