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Maintenance
Leak Test
Leak Test
5-8
42iQHL Instruction Manual
Use the following procedure to perform a leak test.
Equipment Required:
Swage Lock cap (sample port)
Small rubber cap (Perm Dryer filter)
Vacuum Tester with Gauge (with a resolution of .5 in Hg or better)
1. Turn instrument OFF, unplug the power cord.
2. Block the SAMPLE bulkhead on the rear panel with a leak-tight cap.
3. Cap the filter at the end of the Perm Dryer.
4. Connect the vacuum tester tool to the EXHAUST bulkhead on the
rear panel.
5. Squeeze trigger until gauge reads to pull in 10 in Hg.
6. Observe vacuum gauge for stable reading for 5 minutes. If reading
remains at 10 in Hg, no leak is present.
Note Acceptable leak rate is .5 in Hg over 10 minutes.
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Thermo Scientific
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