In order to determine the effectiveness (hermeticity) of the seal on the device, both gross (Fluorocarbon liquid) and fine leak (Grade 5 helium tracer gas) testing is performed. Seal tests are performed in accordance with MIL-STD-883, method 1014, conditions C and D.
Gross leak detection is performed with an Intertest Bubble Detector, model 1014-CBL (Top right) which is followed with a fine leak detection using a Varian Leak Detector, model 959-50 (Bottom right).
Gross leak testing is done with the devices immersed at a depth of 2 inches over a 3 minute period examined by a 3X magnifying window. Fine leak testing is performed for periods up to 60 minutes pressurized @ 60psi.