4. GETTING STARTED
Page 35
© 2007 DH Instruments, a Fluke Company
4.12.2
PURGING THE TEST PORT
The test port of the FPG must be purged when using any gas other than compressed air.
When a DUT is changed, ambient air is trapped in the DUT and the test port of the FPG.
This creates a mix of gas in the test port of the FPG, therefore this procedure should be performed
every time a new DUT is used and compressed air is not the FPG lubricating gas. The following
procedure will purge any air that is trapped in the test port, and introduce the new supply gas.
Set a pressure to full scale of the DUT using the
<VLPC Interface>
window (see Section 6.3.6).
Vent the test pressure using the
[Vent]
option on the
<VLPC Interface>
window.
The pressure does not have to be stable for any particular amount of time.
Cycle the two previous steps at least five times.
Alternatively, see Section 6.7.6 for cycling pressure in a test sequence.
