230 VAC at 50, 60 or 400 Hz single phase. The power supply can also operate from a 24 VDC storage battery in the battery standby mode.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12

MIL-PRF-49080D

4.6

Environmental conditions.

Temperature test.

4.6.1

4.6.1.1

Low temperature. The power supply shall be tested in accordance with Method

502, Procedure I of MIL-STD-810. The storage temperature shall be -80�F (-62.2�C). Upon

completion of Step 4, adjust the internal chamber temperature to -40�F (-40�C) and maintain

until temperature stabilization of the test item is reached. Configure the power supply in its

operational configuration and conduct an operational checkout of the test item. Proceed with

Step 5.

Before, during (between steps 4 and 5), and after testing an operational checkout shall be

performed and shall consist of the tests in 4.5.1, 4.5.2, 4.5.3, and 4.5.5 and shall meet the

requirements of 3.7.1, 3.7.2, 3.7.3, 3.7.4, and 3.7.5 (see 3.8.1.1).

4.6.1.2

High temperature. The power supply shall be tested in accordance with

Method 501, Procedure I of MIL-STD-810. Constant temperature storage shall apply (Step 3).

The storage temperature shall be +160�F (+71�C). Upon completion of Step 3, adjust the

internal chamber temperature to +150�F (66�C) and maintain until temperature stabilization of

the test item is reached. Configure the power supply in its operational configuration and

conduct an operational checkout of the test item. Proceed with Step 4.

Before, during (between steps 3 and 4), and after testing an operational checkout shall be

performed and shall consist of the tests in 4.5.1, 4.5.2, 4.5.3, and 4.5.5 and shall meet the

requirements of 3.7.1, 3.7.2, 3.7.3, 3.7.4, and 3.7.5 (see 3.8.1.2).

4.6.2

Humidity. The Power Supply shall be subjected to the aggravated cycle humidity

test specified in Method 507, Procedure 2 of MIL-STD-810. During (end of the fifth and tenth

cycles) and after testing an operational checkout shall be performed and shall consist of the tests in

4.5.1, and 4.5.2 and shall meet the requirements of 3.7.1, 3.7.3, 3.7.4 (see 3.8.2).

4.6.3

Low pressure (altitude). The power supply shall be tested in accordance with

Method 500, Procedure I and Procedure II, of MIL-STD-810. Procedure I shall be at a pressure

corresponding to 40,000 feet and Procedure II shall be at a pressure corresponding to 15,000 feet,

with a rate of change not to exceed 32.8 ft/s (10 m/s).

Before, during when applicable (Procedure II, Step 3), and after testing an operational

checkout shall be performed and shall consist of the tests in 4.5.1, and 4.5.2 and shall meet the

requirements of 3.7.1, 3.7.3, and 3.7.4 (see 3.8.3).

4.6.4

Immersion. The power supply, as prepared for field transportation, shall be tested

in accordance with Method 512, Procedure I, of MIL-STD-810. Before and after testing an

operational checkout shall be performed and shall consist of the tests in 4.5.1, and 4.5.2 and shall

meet the requirements of 3.7.1, 3.7.3, 3.7.4, and 3.8.4.

4.6.5

Vibration. The power supply shall be tested in accordance with Method 514,

Procedure I, Category 4 (Restrained Cargo) of MIL-STD-810 using the figure for Composite two-

wheeled trailer vibration exposure of Annex A. The power supply shall be vibrated not less than �

hour on each axis. Before and after testing an operational checkout shall be performed and shall

consist of the tests in 4.5.1, and 4.5.2 and shall meet the requirements of 3.7.1, 3.7.3, 3.7.4, and

3.8.5.