| Trace Oxygen Analyzer | Maintenance & Troubleshooting 5 | ||
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Symptom | Cause | What To Do | ||
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Cell lacks sensitivity (contin- | Faulty triac (Q6) in heater |
ued.) | control or faulty triac driver (A4) |
| (continued.) |
•Disconnect the thermo- switch by removing one of the wires from TS4 terminal 3. Meter should show voltage.
•If voltage shows, short terminals 3 and 4 with a test jumper. Meter reading should drop to about zero (less than 10 VAC.)
•If power fails to go on and off as jumper is alter- nately installed and removed between termi- nals 3 and 4, the triac or triac driver is probably at fault and should be replaced.
•If power does go on and off, the thermoswitch (P/N T22) is faulty and should be replaced.
•If none of the above improve the sensitivity, replace the cell.
Teledyne Analytical Instruments |
