(10) Close valve "A".
(11 ) Slowly open valve "B" until pressure-differential gage reads 150 psid (10.55 kg/cm2d).
(12) Close valve "B".
(13) Leave setting for five minutes to verify gage seal. Reading will remain unchanged.
(14) Slowly open valve "A" until gage returns to 0 psi.
(15) Remove weights.
(16) Open valve "B".
(17) Remove gage from tester.
f. 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 metal meets mounting hardware or
(3) Tighten loose connections to pressure systems.
(4) Replace damaged, unrepairable, or unserviceable gage assembly.
3-24. CARTRIDGE FILTER GAGE.
a. General. To verify serviceability or detect mechanical failure, test the CARTRIDGE FILTER gage by
nondestructive testing methods. This paragraph describes the inspection, cleaning, and tests to determine
serviceability and accuracy of the gage.
b. Removal. If necessary, remove cartridge filter gage assembly in accordance with paragraph 2-68.
(1) Inspect exterior coatings and case metal for signs of corrosion resulting from spray of water containing
salts and other chemicals.
(2) Inspect for watertight integrity.
(3) Inspect connections to pressure system, particularly threaded connections and machined socket and