DeFelsko PosiTest Air Instruction Manual page 4

Clean the test areas
Ensure that the test area is free of dirt, dust and debris. The test area
should not be hot (from torching), frosted or extremely wet.
Slight dampness around the test area will not compromise the results of
the test. The area being tested should be free of ice, which may act to
"plug" the leak.
Set Mode of Operation
The PosiTest AIR has two modes of operation:
Automatic (default) and Manual
To view current operation mode, press
Press again to switch between operation modes.
The PosiTest AIR automatically depressurizes the test chamber at a
Automatic Mode Testing: (default and most commonly used mode)
selected rate until the selected pressure limit has been achieved.
Common test parameters:
Pressure Differential Limit: 500 Pa
Rate of Depressurization:
Press to display the current Pressure Differential Limit.
Press repeatedly to select Limit in increments of 100 Pa
(maximum of 900 Pa).
Press to display the current Pressure Differential Rate.
Press repeatedly to select Rate in increments of 5 Pa/sec
(maximum of 30 Pa/sec).
The PosiTest AIR test chamber is manually depressurized using the
Manual Mode Testing:
and buttons. Manual mode is ideal for quick spot checks of
multiple test areas.
Preparing for the Test
Preparing for the Test
25 Pa/sec
3
.