MIL-DTL-85110B(AS)
Step 6. Remove RRHB from chamber and install on test fixture. Perform the actuation
(see 4.2.4.1) and manual release (see 4.2.4.2) tests, after which examine the test per
4.2.1. When inspecting per 4.2.1, test items containing bearings, grease seals,
lubricants, shall be carefully examined for the presence of dust deposits.
4.2.2.5 Humidity. The humidity test shall be performed in accordance
with MIL-STD-810, Method 507.3, Procedure III, except that the steps shall be as follows:
Step 1. The RRHB shall be examined per 4.2.1 and subjected to the actuation (see 4.2.4.1)
and manual release (see 4.2.4.2) tests under the standard ambient conditions
specified in MIL-STD-810. A record of specific pretest data shall be made to
determine that the RRHB is within the requirements of 4.2.1, 4.2.4.1, and 4.2.4.2.
Step 2. Dry the test item at a temperature of not less than 40°C (104°F) nor more than
50°C (122°F) for not less than 2 hours.
Step 3. Condition the test item at 25° ± 5°C (77° ± 9°F)and 50% relative humidity for 24
hours.
Step 4. Subject the test item to five 24 hour cycles in accordance with figure 507.3-3 of
MIL-STD-810. Do not make the performance measurements at the times indicated
on figure 507.3-3. A 24-hour cycle consists of 16 hours at 60° ± 5°C (140° ± 9°F)
and approximately 8 hours at 30° ± 5°C (86° ± 9°F) (includes transition times).
The relative humidity shall be maintained at 95%, or greater, at both temperatures.
Each transition time between 30° ± 5°C (86° ± 9°F) and 60° ± 5°C (140° ± 9°F)
shall be not greater than 1.5 hours. The relative humidity during each transition
need not be controlled. Approximately 2 hours after stabilization during the high
temperature and low temperature portions of the first or second cycle, a sampling
of the atmosphere in the chamber shall be made to determine that the conditions of
temperature and relative humidity are uniform throughout the chamber. The
RRHB shall be removed from the chamber during the third cycle at 60° ± 5° C
(140° ± 9°F) immediately prior to decreasing to 30° ± 5°C (89° ± 9°F) and installed
on the test fixture within a 10 minute time period. Perform the actuation (see
4.2.4.1) and manual release (see 4.2.4.2) tests, after which examine the RRHB per
4.2.1. If the RRHB passes these inspections it shall be replaced in the chamber and
subjected to the remaining 24 hour cycles in accordance with figure 507.3-3.
Step 5. Condition the RRHB at 25° ± 5°C (77° ± 9°F) and 50 ± 5% relative humidity for
not less than 12 hours nor more than 24 hours.
Step 6. Remove the RRHB from the chamber after the conditioning period and install on
the test fixture within a 10 minute time period. Perform the actuation (see 4.2.4.1)
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