MIL-DTL-6019E
otherwise specified (see 6.2), the manufacturer, in accordance with MIL-STD-1916, shall select
the type of sampling plan (attribute, variable, or continuous). The sample size shall be selected
in accordance with verification level I of MIL-STD-1916.
4.4.3.1 Low temperature and cold resistance. The gages shall be placed in a chamber
maintained at a temperature of -85 ºF for a period of 48 hours. At the end of this period, and
while still at that temperature, the gages shall be tested for operation to determine that the
pointers move smoothly throughout the entire range of travel and to determine that no component
parts have been damaged. The temperature shall then be raised to -65 ºF for a period of not less
than 24 hours, after which time and while at this temperature, the gages shall be tested for scale
error and friction as specified in 4.4.1.3 and 4.4.1.4. The readings obtained shall not differ from
those obtained in the individual tests by more than ±50 psi. Following the return to room
temperature, the gages shall be subjected to the individual tests specified in 4.4.1.
4.4.3.2 High temperature. The gages shall be subjected to a temperature of 160 ºF for a
period of 24 hours. The gages shall then be subjected to the scale error at room temperature test
specified in 4.4.1.3 while at high temperature and the readings observed shall not exceed the
individual test readings by more than ±25 psi. Following return to room temperature, the gages
shall be subjected to the individual tests specified in 4.4.1. The gages shall then be examined for
deterioration or damage caused by the high temperature exposure.
4.4.3.3 Sand and dust. The gages shall be mounted in any position and subjected to a
sand spray for a period of 4 hours. The sand stream shall not directly impinge upon the gages,
and the flow of sand shall be approximately 2.5 pounds per hour. Four pounds of foundry
molding sand, or equivalent, which has passed through 150-mesh screen, shall be used. The
ambient temperature in the chamber shall be maintained at a temperature of 160 ºF. Each gage
shall not contain more than 1 gram of sand at the end of the test.
4.4.3.4 Humidity cycling. One complete sample gage, mounted with the dial in a vertical
position, shall be subjected to the following humidity cycling test. At the completion of the test, the
gage shall be examined for collection of moisture in the interior of the case, for corrosion of metal
parts, or for any other damage. A second sample gage, with case removed, shall be subjected to the
humidity cycling and inspection for the same features shall be conducted with the exception of
collection of moisture within the case. The gage shall then be placed in a chamber and kept for 6
hours at a temperature of 150 ºF and relative humidity of 95 percent. After the required time, the
chamber shall be shut off and the gage shall be allowed to cool to room temperature for 18 hours in
this atmosphere in which the humidity rises to 100 percent as the temperature decreases. Precaution
shall be taken to prevent dripping on the gage. The complete procedure shall be performed 15
times. The scale error at room temperature test specified in 4.4.1.3 shall again be performed at the
completion of the cycles and the change in indication shall not exceed the initial scale error at room
temperature test by more than ±25 psi. There shall be no excessive corrosion of any of the
components.
4.4.3.5 Mounting nuts. Each attached mounting nut of the completely assembled type II
case shall have an axial load of 25 pounds applied in order to tend to pull the nut out of the lug
toward the rear of the case. There shall be no loosening of the nut. A torque of 10 pound-inches
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