TB 9-6685-319-35
Figure 1. 1.0 to 10,0000 psi hydraulic gages (0.1 to 1.0 percent accuracy) - equipment setup.
(2) Calculate tolerance limits for TI, using accuracy specified for applicable gage
(3) Place enough deadweights (supplied with pressure gage tester (A2)) on
applicable low or high pressure piston to obtain a pressure equal to cardinal point nearest
10 percent of TI scale.
CAUTION
To avoid scoring the piston guide and damage to the
deadweight cylinder, constantly rotate weights and piston
when inserting or removing piston or when applying pressure.
(4) Using hand pump, apply pressure to deadweight cylinder until (low or high
pressure) piston is approximately 9/16-inch above deadweight cylinder.
(5) Visually inspect equipment connection for leakage. If leakage appears release
pressure and tighten or seal connections as required.
CAUTION
Do not remove weights installed in (3) above from low or high
pressure piston during remainder of this procedure.
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