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Programming
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Pressure Error in a Flow Test
Pressure error is used to make sure pressure is at the target level to
perform a flow test. This is necessary because flow rate changes
as pressure changes. Pressure error in a flow test functions much
like pressure error in a pressure decay test except pressure error is
checked at the end of the test phase. Figure 53.
Pressure error is set by entering one pressure number. Sprint iQ
sets the positive and negative pressure error around the nominal
test pressure.
If air pressure at the end of test time is below the minimum
pressure error value, Sprint iQ stops the test. If vent is active,
Sprint iQ vents the air to atmosphere. In this case, Sprint iQ
displays an error message in the status box on the run display.
Flow Test Stabilization
Stabilize phase is not available in a flow test, so when setting up a
flow test, make sure the test time is long enough for the product to
reach a steady flow rate.
If the air pressure at the end of test time is above the maximum
pressure error value, Sprint iQ stops the test and if vent is active,
vents the air to atmosphere.
Flow Setpoints
Besides pressure error tolerance, flow testing requires two
independent setpoints for flow rates- minimum and maximum
flow. To pass a flow test, the product must be within the pressure
tolerance and also within both flow setpoints at the end of test
time.
Protect the Flow Sensor
Do NOT run a flow test unless product is attached to Sprint iQ's test port.
Without this restriction, the high flow rate could damage the flow sensor.
