DeFelsko PosiTest Air Instruction Manual page 6

Careful observation is important as bubbles of
different sizes can form anywhere within the test area
where solution is present. Bubbles may also form
and pop quickly. A very large leak may not form a
bubble, but rather blow solution away.
When a leak has been identified, the test can be halted by pressing the
button. In Automatic mode, the PosiTest AIR will automatically stop
when the pre-selected pressure limit is reached.
Let the pressure within the test chamber decrease before removing it
from the test surface. The test area can then be marked for further repair,
or the bubble can be photographed if documentation is required for the
particular job.
Upon completion of the test, the maximum pressure differential and
duration of the test will flash on the display.
4. Store Test Result (optional)
Press upon completion of the test. The PosiTest AIR will display
"PASS".
Press to store a PASS result.
Press to store a FAIL result.
In addition to the PASS/FAIL result, the rate of depressurization,
maximum pressure differential and test duration is stored in memory.
Press repeatedly, to review test results stored in memory.
To remove all stored data:
Press and hold the
The icon on the display will disappear.
button, then press the
5
button.