Maintenance and Calibration
Performing Sample Path and Case Leak Checks
5-26
PDM3700 Instruction Manual
Thermo Fisher Scientific
3.
When in the PDM – COM1 screen, select the “Leak Check” button to
display the Leak Check Routines screen (
Figure 5–35
).
Figure 5–35.
Leak check screen
4.
Insert sample line plug in open end of sample tubing (
Figure 5–36
).
Figure 5–36.
Insert sample line plug into tubing
5.
Prior to the start of the leak check, locate the pump exhaust muffler
(
Figure 5–37
). When the sample path leak check starts, the pump will
start to run until a proper vacuum level is achieved in the flow line and
the pump is turned off. At this time press a portion of leak check putty
onto the pump exhaust muffler. Press firmly, but not so that putty gets
stuck in the exhaust muffler opening (
Figure 5–38
).
