TB 9-6685-319-35
NOTE
It is preferred that the system pressure source be utilized when
calibrating panel mounted pressure gages, since TI and system
pressure source are connected. If system pressure source is not
available, utilize procedure in paragraph 8 above.
(5) If TI indication does not indicate within limits calculated in (3) above, perform b
below.
(6) Repeat (1) through (5) above, using cardinal points nearest to 80, 60, 40 and 20
percent of TI scale.
b. Adjustments. Perform 8b above.
10. 0 to 10,000 Psi Panel Mounted Hydraulic Gages
a. Performance Check
WARNING
To prevent injury to personnel and/or damage to equipment,
make certain that all components are within range of unit to be
calibrated and all connections are securely sealed prior to
applying pressure to TI.
(1) Connect equipment as listed in (a) through (d) below:
(a) Cap one vertical port on deadweight tester (part of A2).
(b) Connect applicable low or high pressure cylinder to other vertical port on
deadweight tester and install appropriate piston.
(c) Connect horizontal outlet port of deadweight tester to input port of TI.
(d) Cap all other system outlet ports and close system shut-off valve.
NOTE
The deadweight tester should be located so that reference
planes of TI and deadweight tester are same height to
eliminate an error caused by hydraulic head pressure.
(2) Calculate tolerance limits for TI, using accuracy specified for applicable gage.
(3) Place enough deadweights (supplied with pressure gage tester) on the applicable
low or high pressure piston to obtain an indication on standard pressure gage equal to 10
percent of TI scale.
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