TB 9-6685-319-35
(10) Calculate tolerance limits for TI, using accuracy specified for applicable gage.
(11) Place enough deadweights (supplied with pressure gage tester) on applicable low
or high pressure piston to obtain a pressure equal to cardinal point nearest to 10 percent of
TI scale.
WARNING
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.
(12) Using hand pump, apply pressure to deadweight cylinder until (low or high
pressure) piston is approximately 9/16-inch above deadweight cylinder.
(13) Visually inspect equipment connections for leakage. H leakage appears, release
pressure and tighten or seal connections as required.
CAUTION
Do not remove weights installed in (11) above from low or high
pressure pistons during remainder of this procedure.
(14) Place enough deadweights on applicable low or high pressure piston to obtain
the 90 percent cardinal point of TI. Refer to table 4 for conversion table.
(15) Repeat (12) above.
(16) If TI indication does not indicate within limits calculated in (10 above, perform b
below.
(17) Repeat (10) and (14) through (16) above, using enough weights to obtain
cardinal points nearest to 80, 60, 40, 20, and 10 percent of TI scale.
b. Adjustments. Perform 8b above.
17. Final Procedure
a. Deenergize and disconnect all equipment and reinstall protective cover on TI.
b. Annotate and affix DA Label/Form in accordance with TB 750-25.
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