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|  MIL-C-52477D(ME)
Temperature of air at receiver outlet, degrees Fahrenheit.
a.
Aftercooler inlet and outlet temperatures, degrees Fahrenheit.
b.
Temperature air intake, degrees Fahrenheit.
c.
Ambient air temperature and pressure, degrees Fahrenheit and inches Hg.
d.
Lubricating oil temperatures, degrees Fahrenheit.
e.
Oil consumption (record only at end of 2-hour run).
f.
Dewpoint of delivered air, degrees Fahrenheit, measured by a coulometric,
g.
electrolytic-type, dial-indicating hygrometer.
Compressor crankshaft speed, rpm.
h.
Discharge pressure, psi.
i.
Air delivery rate, cfm, determined in accordance with the ASME
j.
Performance Test Code PTC-9, utilizing a long-radius flow nozzle; or by
calculation of a weight of air delivered in a given time against a back
pressure of 3,500 psig, wherein the volume of the pressure vessel
utilized for weight measurement shall not be less than 1,000 cubic inches
and capacity shall be calculated in terms of free air at intake
conditions.
4.6.2.7.2 Failure criteria.
Any one or more of the following shall constitute
failure of this test:
Aftercooler outlet temperature greater than 30 F above ambient
a.
temperature.
b.
Oil consumption in excess of 10 cc per hour.
c.
Dewpoint greater than minus 65 F.
d.
Air delivery less than 4 cfm of free air at 3,500 psig.
4.6.2.8 Moisture separator. Operate the compressor for a minimum of 15
minutes at a temperature of 120 F and a relative humidity of 85 percent. (This
test may be run in conjunction with the high-temperature test.) Examine the
dehydrator and the lines connecting the moisture separator to the dehydrator for
evidence of oil or water. Any condensed water or oil carryover from the
separator into the dehydrator shall constitute failure of this test.
4.6.2.9 High temperature. Subject the compressor to a minimum ambient
temperature of 155 F for a period of 4 hours, including 1 hour at not less than
160 F and examine for damage. Subject the compressor to an ambient temperature
of 120 F plus or minus 5 F until the temperature data specified in 4.6.2.7.1
have stabilized. Start the compressor and operate at rated capacity for not less
than 8 hours while maintaining 120 F plus or minus 5 F ambient temperature, and
record the data specified in 4.6.2.7.1 at 30-minute intervals. Damage to the
compressor, or any of the failure criteria specified in 4.6.2.7.2 shall
constitute failure of this test.
4.6.2.10 Low temperature. Subject the compressor to an ambient temperature no
greater than minus 50 F for a period of 6 hours without solar radiation, and
examine for damage. Subject the compressor to an ambient temperature of minus
25 F plus or minus 5 F until the temperature data specified in 4.6.2.7.1 have
stabilized (the moisture separator may be preheated). Start the compressor and
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