MIL-PRF-62284B(AT)
TABLE II. Verification methods - Continued.
Title
Requirements
Verification
3.6
4.2.6
Operating environment
3.6.1
4.2.6.1.1
requirements
Temperature, high
3.6.1
4.2.6.1.2
Temperature, low
3.6.2
4.2.6.2
Vibration
3.6.3
4.2.6.3
Shock (non-operating)
Basic intensity
3.6.3.1
4.2.6.3.1
High intensity
3.6.3.2
4.2.6.3.3
Waterproofness
3.6.4
4.2.6.4
Dust
3.6.5
4.2.6.5
Humidity
3.6.6
4.2.6.6
Corrosion
3.6.7
4.2.6.7
3.6.8
4.2.6.8
Protective finish & color
4.2.2 Test methods and procedures.
4.2.2.1 Environment. Unless otherwise specified (see 6.2), all tests shall be conducted
under the following conditions:
Air temperature: 77 ± 18F.
a.
b.
Barometric pressure: 28.5 (+2.0, -4.5) in. of mercury.
c.
Relative humidity: 50 ± 30%.
d.
Voltage: 24.0 ± 0.5 Vdc.
4.2.3 Operating requirements verification.
4.2.3.1 Operating characteristics. To determine conformance to 3.3.1, the operating test
shall consist of connecting the blower to a variable dc power source and measuring load current,
load speed and speed range. Failure to meet any of the listed characteristics shall cause failure of
this test.
4.2.3.2 Airflow. To determine conformance to 3.3.2, the airflow test shall be
accomplished utilizing a suitable proportioned, air inlet duct in accordance with
ASHRAE Standard 51, and AMCA Bulletin 210, Method of Testing Fans. Airflow shall be
computed in stdft3/min.
4.2.3.3 Dielectric strength. To determine conformance to 3.3.3.1, the dielectric strength
test shall be performed prior to final assembly on the armature and field windings separately
when used. Apply 500 V rms at a frequency of 60 Hz for a period of 60 seconds. The test
voltage shall be raised from zero to the specified value as uniformly as possible, unless otherwise
specified, the test voltage may be applied instantaneously during conformance testing. A
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