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Note: Anytime there is compression or expansion of a gas in a closed system a
pressure change will ensue as a result of adiabatic.
a) The Wait Time is to allow thermal equilibrium “adiabatic” to occur so that the leak
measurement made during the “Leak Time” phase is truly a result of the system
leak rate and not a result of adiabatic instability.
b) For Low Level Leak testing (< 5,000 ft.) a Wait Time of 1:00 min is
recommended.
c) For High Level leak testing (> 10,000 ft. or high ROC) a Wait Time of 5:00
minutes or more is recommended to allow adiabatic stability to occur.
d) Leak Time is the duration of time that will be used to measure the leak rate. The
value can be changed. Touch the “Leak Time” zone area and a touch screen
keypad will appear allowing the user to re-define the Leak Time.
Figure 29 Leak Rate Timer Results
3. ATP Leak Test Profiles – automated leak testing.
The user can select the ATP “Automatic Test Process” Leak Test Profile which
defines the necessary test parameters. Once the ATP profile has been selected, the
user can select RUN and walk away returning once completed to observe the leak
test results.
Main Menu: Leak Testing, ATP Leak Test Profiles, Select Leak Test Profile(s)
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