a. The instructions outlined in this paragraph are preparatory to the (calibration
process. Personnel should become familiar with sections I, II, and IV before beginning
b. Items of equipment used in this procedure are referenced within the text by,
common name and item identification number as listed in tables 2 and 3. For the
identification of equipment referenced by item numbers prefixed with A, see table 2, and
TI for any signs
d. Remove deadweight pressure tester (A4) (standard) from carrying case and place
on clean, sturdy workbench approximately 30 inches high.
Certify pressure gages to 0.25 percent of full scale in
accordance with TB 9-6685-319-50.
One person should not attempt to lift or carry the sets of
weights any distance. Each set weighs approximately 100
e. Remove oil filler plug on tester and fill reservoirs with hydraulic oil NM-L-7870,
filler plugs and open vent valves.
f. Bolt TI and standard to workbench approximately 15 inches apart.
Unless otherwise specified, verify the results of each test and
take corrective action whenever the test requirement is not
met before continuing with the calibration.
When weight tables appear to be perfectly balanced before
calibration weights are added, try calibration weights first on
one weight table, then the other. The balance must be
affected by the specified amount of calibration weights.