119
17.5 Verifying the Stall Low Setting - Static
Exit Diagnostic Mode. In Normal Mode, block the inlet. The pump should stall after a few
seconds, sending the instrument into alarm. This tells you that the pump’s Stall Low setting is
correct.
If the gas inlet is blocked but the pump does not shut down, or the pump shuts down too
easily with a slight blockage, the pump stall threshold value may be set too high or too low.
If the pump does not stall and send the instrument into alarm, then there may be a leak in the
gas inlet or the pump is weak or defective and should be replaced.
Important!
When you are done setting thresholds, exit Diagnostic Mode and test the instrument
before actual use.