MIL-PRF-62331A(AT)
3.4.6 Electromagnetic interference. The assembly shall meet the requirements of
figures 3, 4, 5, and 6 for conducted emissions and radiated emissions for ground vehicles. Test
equipment shall be located at 1 meter from the item being tested for radiated emissions
(see 4.5.7).
3.4.7 Dielectric strength. There shall be no continuing sparkover, no breakdown of
dielectric material and no damage to the insulation which would cause failure of the pump
assembly when tested in accordance with 4.5.8.
3.4.8 Insulation resistance. The insulation resistance of the pump assembly shall not be
less than 12 megohms when tested at 500 Vdc (see 4.5.9).
3.4.9 Dynamic balance. The pump assembly shall conform to the requirements of NEMA
Standards Section MG1-4.21. The maximum peak-to-peak displacement in any direction shall not
exceed .002 inch (in.) (see 4.5.10).
3.4.10 Temperature. The assembly shall meet the performance requirements specified
herein at temperatures ranging from 0°F to +125°F. The assembly shall not be damaged by
temperatures ranging from -65°F to +160°F while not operating (see 4.5.11).
3.4.11 Vibration resistance. The assembly shall be capable of operating as specified
herein after withstanding the vibration profile per figure 7 for a period of 80 minutes (including up
to 4 resonance dwells of 13-1/3 min each) in each of the 3 mutually perpendicular axes, X, Y, and
Z, shown in figure 8 (see 4.5.12).
3.4.12 Shock resistance (non-operating). The assembly shall be capable of operating as
specified herein after exposure to three half sine wave shock pulses of 40 + 4 gravity units (g)
peak for a duration of 18 + 3 milliseconds (ms) applied in both directions along the 3 mutually
perpendicular axes, X, Y, and Z shown in figure 8 (see 4.5.13).
3.4.13 Corrosion resistance. The assembly shall be capable of operating as specified
herein after exposure to a 5% sodium chloride atomized spray for 96 hrs (see 4.5.14).
3.4.14 Waterproofness. The pump assembly shall perform as specified herein after it is
totally submerged and tested for leakage in accordance with 4.5.15.
3.5 Marking. A nameplate shall be attached securely to the pump assembly as shown on
Drawing 7059833. The nameplate shall be marked to include the Military part number, National
stock number (NSN), manufacturer's name, serial number and date of manufacture. In addition,
the Military part number shall be permanently inscribed on the pump assembly in a clearly visible
location not covered by the nameplate (see 4.4.2).
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