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Replacing Tcd Delta- T Temperature Sensor Cartridges - HP 5890 SERIES II Service Manual

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Replacing TCD Delta- T Temperature Sensor Cartridges

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.
THE TCD MUST BE TURNED OFF BEFORE REPLACING ITS DELTA- T SENSOR
CARTRIDGE.
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.).
6. If the detector is not going to be replaced with a
new detector, cap the detector base.
7. Lift the hinged top cover at its front edge,
exposing the detector area.
8. Remove the TCD detector cover by removing
two screws: one from each side of the detector
cover.
9. If the detector is not going to be replaced with a
new detector, cap the TCD vent port on the top
of the detector. (This will not be required on a
series connected TCD.)
Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com
VENT
PORT
SVC 6- 39
RED O VISIBLE
OFF
ON

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