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|  MIL-A-81359(AS)
under the conditions specified in 4.5.1. The life test sample shall be selected by the
government inspector in accordance with the following. (Equipments which have success-
fully passed the initial production test, sampling tests, reliability tests, or special tests
may be selected for life tests. ) When reliability tests are conducted, the life test may be
omitted if, during the reliability tests, a quantity of equipments equal to, or more than, that
listed below receive at least 300 hours each of test time.
Quantity to be Selected
Quantity of Equipments
for Life Test
Offered for Acceptance
1
First 25
1
Next 175
1
Next 300
1 for each additional 500
or fraction thereof
Test Conditions - The life test shall be conducted under the following
4.5.1
simulated service conditions:
Normal room
Temperature
Normal ground (0 - 5000 ft)
Altitude
Room ambient
Humidity
115 5V (at lowest applicable frequency)
AC Voltage
27.0 2.0V
DC Voltage
Test Periods - The test may be run continuously or intermittently. Any
4.5.2
period of operation shall be of sufficient duration to permit the equipment temperature to
stabilize. Periodically, the equipment shall be turned on and off several times and put
through its various phases of operation.
4.5.3
Performance Check - At approximately 8-hour intervals during the test,
a limited performance check shall be made. The performance check proposed by the con-
tractor shall be subject to approval by the procuring activity.
Test Data - The contractor shall keep a daily record of the performance
4.5.4
of the equipment, making particular note of any deficiencies or failures. In the event of part
failures, the defective parts shall be replaced and the operation resumed for the balance of
the test period. A record shall be kept of all failures throughout the test, including all tube
failures. This record shall indicate the following:
(1) Part type number
(2) The circuit reference symbol number
(3) The part function
(4)
Name of the manufacturer
(5) Nature of the failure
.
(6) The number of hours which the part operated prior to failure
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