7-4 2000-OSM, F1
CAUTION
See "AIR PURGING" in Section 4 for the override function. Do not perform
override until you have read Section 4 completely and you understand and can
perform the procedure requirements.
1. Stop Analysis at the end of the current analysis cycle, and make no sample injection until
procedure is completed.
2. Remove power from analyzer.
3. Shut off carrier to analyzer.
4. Open the Controller front door and locate the Detector Amplifier on the left side wall.
5. Remove the six thumb nuts, cover, and plastic shield from the Detector Amplifier. Then locate
TB16 .
6. Disconnect the wires on TB 16 terminals 2 (red) and 8 (white).
7. Connect ohmmeter leads between TB16 terminal 7 and the white wire removed from terminal 8,
and measure the resistance of the measure filament.
8. Connect ohmmeter leads between TB16 terminal 1 and the red wire removed from terminal 2,
and measure the resistance of the reference filament. The measured values of the two filaments
should be within one ohm of each other.
9. If the filaments are not within one ohm of each other, replace the filaments. See “FILAMENT
TCD REPAIR” in Section 8.
10. Check filament to ground resistance with an ohmmeter. It should indicate an open circuit.
11. If filament resistance is within tolerance, Test Procedure 6 is complete.
12. Check all connections, then replace the Detector Amplifier plastic shield, cover, and thumb nuts.
13. Close and tighten the Controller front door.
14. Apply air and carrier to analyzer.
15. Apply power.
16. When analyzer temperature stabilizes, perform Test Procedure 5 (TC Detector Balance).
TP 7: COLUMN TRAIN PROBLEMS
CAUTION
It is the customer’s responsibility to ensure that the area is safe and and hazard-
free, and will remain so the entire time the analyzer is open. This responsibility
includes ensuring adequate ventilation in analyzer shelter and obtaining proper
work permits, etc.
See "AIR PURGING" in Section 4 for the override function. Do not perform
override until you have read Section 4 completely and you understand and can
perform the procedure requirements.
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