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6 OPERATION
Fill Tolerance
Fill Flow Control
Helium Pressure Switch
Part N2 Purge
Part Decay Testing
Max Evac Pressure
Evac Rec. Setpoint
6.5.2.3.
Leak Rate Unit
LD Start Up Time
Gross Leak Factor
26
This tolerance is a +/- in relation to the Recipe settings for the helium fill, air fill,
evac, and part vent pressures. If the pressure is not within the setpoint +/- the
tolerance during the fill step, a fault will occur.
Control the flow rate of the helium or air fill process.
Check the box if a pressure switch is installed at the helium inlet to monitor the
helium supply pressure. The switch will cause a fault if the supply pressure is below
the setpoint.
Check the box if the test sequence includes a Nitrogen purge process.
Check the box if the test sequence includes a pressure decay process.
Maximum allowable pressure for opening the part evac valve (protects the evac
pump from high pressure spikes).
Pressure that the part is evacuated to during the recovery (part clean up)
sequence.
Leak Detector Configuration
Choose the desired leak rate unit.
This timer runs while the leak detector is starting up upon power-up. If the timer
expires a fault will occur.
The gross leak factor can be used in all configurations except the charge only
configuration. Enter a factor between 20 and 1000. This value is multiplied by the
leak rate reject limit specification in the Recipe. If during the leak test step, the leak
rate exceeds this gross leak setpoint then the test will automatically fail and
immediately stop. This feature limits the exposure the leak detector helium
contamination and ensure subsequent "good" parts will not give a false fail due to
high helium background in the leak detector.
ATLAS Operations and Maintenance Manual
LACO Technologies
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