MIL-DTL-25308C
4.5.2 Scale and friction error. The gage shall be tested for scale error at ambient temperature at
the test points specified in table I. The gage shall be read before and after lightly tapping or
vibrating the gage. The reading made after the gage is tapped or vibrated shall be the scale
reading. The difference between the readings before and after the gage is tapped or vibrated
shall constitute friction error. The scale and friction errors shall not exceed the tolerances
specified in tables I and II. This test shall be conducted both up-scale and down-scale at the
specified test points.
4.5.3 Position error. During the test, an indication of approximately 2,000 psi shall be
maintained on the gage. The maximum change in indication produced by rotating the gage from
the normal operating position to a position 90° both clockwise and counterclockwise
(longitudinal axis vertical) shall not exceed the position error tolerance specified in table II.
4.5.4 Vibration. The gage shall be subjected to a vibration test in accordance with MIL-STD-
810B (dated 15 June 1967), method 514, procedure I, equipment category (a), curve B. An
indication of approximately 2,000 psi shall be maintained on the gage during this test. Pointer
oscillation and variation shall not exceed the tolerances specified in table II. At the conclusion
of this test, the gage shall be subjected to the scale and friction error test. The errors shall not
exceed the tolerances specified in table I and II. No damage to the gage shall result from this
test.
4.5.5 Low temperature operation. The gage shall be subjected to a low temperature test in
accordance with MIL-STD-810, method 502, procedure for operational testing (procedure II), at
-54°C±2°C (-65°F±4°F) for a period of 4 hours. During this test, an indication of approximately
2,000 psi shall be maintained on the gage. At the end of this period and while still at the
specified temperature, the gage shall be subjected to the scale and friction error test. The errors
shall not exceed the tolerances specified in tables I and II. After completion of the low
temperature testing, the gage shall be returned to room temperature for a minimum of 4 hours
and subjected to the scale error test. The scale errors shall not exceed the tolerances specified in
table I for room temperature.
4.5.6 High temperature operation. The gage shall be subjected to a high temperature test in
accordance with MIL-STD-810, method 501, procedure for operational testing at constant
temperature exposure (procedure II), at 100°C±2°C (212°F±4°F) for a period of 6 hours. During
this test, an indication of approximately 2,000 psi shall be maintained on the gage. At the end of
this period and while still at the specified temperature, the gage shall be subjected to the scale
and friction error test. The errors shall not exceed the tolerances specified in tables I and II.
After completion of the high temperature testing, the gage shall be returned to room temperature
for a minimum of 4 hours and subjected to the scale error test. The scale errors shall not exceed
the tolerances specified in table I for room temperature.
11
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business