(1) Clean pipe connector threads.
(2) Clean gage crystal.
e. Pressure Test. Make a pressure test using a suitable means of producing adequate and accurate pressure.
f. Accuracy Test.
(1) Test gage for accuracy before and after pressure test to determine whether there has been any
distortion in the bourdon tube that could affect gage registration.
(2) Make the test for accuracy of gage registration by placing the gage in a test fixture.
(3) Apply zero, full-scale, and midscale pressures, then check gage registration.
(4) If gage registration conforms to step (3), return gage to service.
g. Repair or Replace.
(1) Reseal crystal into case, if loose.
(2) Conduct a corrosion control program when coating shows signs of pitting in the form of deep cavities
of small diameter (either localized or over large areas), peeling of the case coatings, cracks, abrasions, or
chemical deterioration where dissimilar metals meet (particularly where gage meets mounting hardware or pipes).
(3) Tighten loose connections to pressure system.
(4) Replace damaged, unrepairable, or unserviceable gage assembly.
(5) Send unusable cartridge filter gage assembly to next higher level of maintenance.
h. Packaging for Reissue.
(1) Tag tested serviceable gage assembly for identification.
(2) Seal gage assembly in a polyethylene bag.
(3) Package gage assembly for reissue to Unit Maintenance.
3-25. MULTIMEDIA FILTER GAGE.
a. General. To verify serviceability or detect mechanical failure, MULTIMEDIA FILTER gage is tested by
nondestructive testing methods. This paragraph describes the inspection, cleaning, and tests to determine
serviceability and accuracy of the gage.