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Calculation
Sprint LC calculates
the leak rate from the
pressure drop over
time. The leak rate is
calculated by this equation.
Sprint LC automatically adds its own internal volume to the product
volume for the total volume.
The tester assumes an atmospheric pressure of 14.7 psig (1 standard
atmosphere) when calculating the cc/m rate.
Turn off flow rate calculation
If the volume is set to zero, then Sprint LC does not convert the leak rate
to cubic centimeters per minute. The test results remain in pressure decay.
Testers with flow sensors do not have the Prod
Volume parameter line because those testers
read directly in flow units.
Flow Test
The flow test has two reject limits, a minimum and a maximum. They
define the “good” window. If the flow rate is within this window the
product is accepted as good. If the flow rate is lower than the minimum or
higher than the maximum the fail light turns on and LOW or HIGH is
displayed in the Sprint LC status box.
Burst Test
The burst test also has two reject limits, a minimum and a maximum, that
define the “good” window. If a burst event is detected while the pressure
is within this window the product is accepted as good. If the pressure is
lower than the minimum or higher than the maximum the fail light turns
on and LOW or HIGH is displayed in the Sprint LC status box.
Δ Pressure
* Total Volume
ccm =
Δ Time
* Atmospheric Pressure
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