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|  3.2.3
Service conditions.
The test set shall be designed to meet the perform-
3.2.3.1 Electrical.
ante requirements of this specification when supplied with the electrical
power of 3.2.2.1. Commercial equipment items selected as elements of the
test set shall meet the electrical service requirements of the manufacturer's
specifications covering these items.
3. 2.3.2 Environmental. The test set shall operate satisfactorily under
the environmental service conditions specified below.
3.2.3.2.1 Organizational level. Equipment designed for use at the organi-
zational level of maintenance shall withstand exposure to the environments
specified in MIL-T-21200 for Class 2 equipment except that the maximum non-
operating temperature shall be
and the vibration exposure
shall be in accordance with MIL-STD-167, Type I.
3.2.3.2.2 Intermediate level. Equipment designed for use at the inter-
mediate level of maintenance shall meet the following environmental re-
quirements:
a.
Vibration - The equipment shall withstand exposure to
vibration in accordance with MIL-STD-167, Type I.
Shock - The equipment shall withstand, with commercial
b.
equipment not installed in the test set, shock pulses
of 15g amplitude for 11 + 1 milliseconds duration applied
in accordance with MIL-T-21200.
Temperature/altitude - The test set shall provide con-
c.
tinuous, satisfactory operation over temperatures ranging
from zero to 45 C (+32 to +113 F) at altitudes ranging
from sea level to 10,000 feet. The maximum nonoperating
temperature shall be
and the minimum shall
be
The maximum nonoperating altitude shall
be 50,000 feet.
d.
Humidity - The test set shall withstand the effects of
humidities up to 95 percent, with no condensation, under
operating or nonoperating conditions. The test set,
except commercial equipment, shall withstand the effects
of humidities up to 95 percent, including condensation,
under operating or nonoperating conditions.
MIL-T-21200, as modified below, shall apply.
3.2.4 Maintainability.
3.2.4.1 Mean time to repair (MTTR). The test set items of Table I shall
be capable of being restored to normal operation within 4 hours (mean time)
after a malfunction is detected (see 6.3.14).
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