DH Instruments PPC2 AF - Analog; Setup Menu Key

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PPC2 AF OPERATION AND MAINTENANCE MANUAL

To purge:

Press the LEAK CHECK function key.

Use the direct manual pressure control keys to set the desired leak

check/purge pressure (generally full scale of the device or system under test).

Wait for pressure to stabilize.

Press the VENT key to cause the purge function to execute. Wait for purge

function to execute completely. Observe whether any liquid contaminants

exhaust from the SPLT exhaust valve.

Repeat from until no noticeable amount of liquid contamination is observed in .

To leak check:

Press the LEAK CHECK function key.

Use the direct manual pressure control keys to set the desired leak check

pressure (generally full scale of the device or system under test).

Wait for pressure to stabilize.

Observe the leak rates displayed in the leak check screen to determine if the

leak rate is within acceptable limits. If leak rate is not acceptable, identify

source of leak, vent system and correct source of leak.

Repeat from until leak rate observed in is acceptable.

The leak check function can also be used at any time during operation to

check current leak rate and/or cause the purge routine to execute.

There is very little risk of contamination of PPC2 AF if it will be used to apply

ascending pressures only to the device or system under test since flowing

gas back to the PPC2 AF can be avoided. In this case, particularly if working

with a significantly contaminated device or system under test, it may be

preferable to not use the PURGE function until the end of the test after the

last ascending pressure increment has been set. Also, be sure not to

execute the PURGE function at pressure above 150 psi (1 MPa).

3.2.9 ANALOG

Function not implemented on PPC2 AF.

3.3 SETUP MENU KEY

 PURPOSE

The SETUP menu key accesses a menu of functions and features commonly used in setting up PPC2 AF

for use.

 OPERATION

Press the SETUP key from the main run screen to access the

SETUP menu. The display is:

1ControlRef 2Resltn

3Sequence 4Drivers