Thermo Scientific TRACE GC Ultra Maintenance And Troubleshooting Manual page 330

Chapter 15
Maintaining a Photoionization Detector
12. Set the carrier pressure to
The actual value should not change more than
5% during two or three minutes. If this occur,
you can consider the system free from leaks.
On the contrary, if the pressure begins to drop
immediately, one or more leaks are present.
13. Using the leak detector, check the connection
between the capillary adapter and the detector,
located inside the oven.
14. If a leak is detected, replace the seal of the
capillary adapter (#14 in the exploded view
reported on page 316). In this case repeat the
leak test to ensure complete tightness.
15. If the detector localizes the leaks on the detector
body, cool the temperature of the detector to
ambient and try to correct them tightening the
heat sink, then check again using the detector.
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