MIL-DTL-62366D(AT)
The slip ring assembly shall be immersed in tap water to a depth of 6 to 7 in. (15 to 18 cm) above
the top cover for not less than 5 minutes while bubbles which result from entrapped air on
various external parts of the slip ring assembly and cable are noted and cleared where practical.
While the slip ring assembly is still immersed, an internal pressure of 1±0.5 psig (7±3.5 kPa)
shall be applied and held for a period of at least 1 minute while the slip ring assembly is
examined for the appearance of new bubbles. There shall be no bubbles emitted from the slip
ring assembly as a result of pressurization. At the completion of the test, the slip ring assembly
shall be removed from the water and the pressure port and mating connector removed. The
pressure port shall then be sealed with a self-sealing screw.
4.3.8.1.1 Alternate water immersion (nonoperating). If the appropriate equipment
necessary for 4.3.8.1 is not available, the following test shall be performed to determine
conformance to 3.6.1. The slip ring assembly shall be placed in a pressure chamber. A tube
shall be connected to the slip ring assembly pressure port and routed outside the chamber to a
container of water at atmospheric pressure. The end of the tube shall be covered by not more
than 1 in. (2.54 cm) of water. The chamber shall be pressurized to 0.6±0.1 psig (4.1±0.7 kPa)
and held for at least 3 minutes. The immersed end of the tube shall be observed for bubbles
evidencing air leakage. Entrapped air in or on the tubing shall be distinguished from air leakage.
There shall be no evidence of air leakage from the slip ring assembly.
4.3.8.2 Atmospheric pressure (nonoperating). To determine conformance to 3.6.2, the
slip ring assembly shall be tested in accordance with MIL-STD-810, method 500.2, procedure I,
or equivalent (see 4.3.1). The test pressure shall be that equivalent to an altitude of 40 000 ft (12
192 m).
4.3.8.3 Sand and dust (nonoperating). To determine conformance to 3.6.3, the slip ring
assembly shall be tested in accordance with MIL-STD-810, method 510.3, procedure I, or
equivalent (see 4.3.1), except that the temperature during test step 5 shall be limited to 140 °F
(60 °C).
4.3.8.4 Shock (nonoperating). To determine conformance to 3.6.4, the slip ring
assembly shall be tested in accordance with the requirements of MIL-STD-202, method 213B,
condition J, or equivalent (see 4.3.1), except that 25 g for 11 ms shall apply.
4.3.8.5 Vibration (nonoperating). To determine conformance to 3.6.5, the slip ring
assembly shall be tested in accordance with the requirements of MIL-STD-810, method 514.4,
category 8, procedure I, or equivalent (see 4.3.1), with the test level as specified in figure 2. The
sweep time shall be 15 minutes from 5 to 500 to 5 Hz. A sinusoidal cycling time of 30 minutes
per 1000 miles (1609 kilometers (km)) or a maximum 3 hours per axis is required.
4.3.8.6 High temperature. To determine conformance to 3.6.6, the slip ring assembly
shall complete 25 cycles as specified in 4.3.5.2 during high temperature testing in accordance
with MIL-STD-810, method 501.3, procedures I and II, or equivalent (see 4.3.1), with the
following exceptions:
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