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MIL-N-81604C(AS)
Para 4.4.5
(cont)
*
Where practical, a test shall be included in the
d.
individual test to check all equipment for this
requirement until reasonable assurance is obtained
*
that the defect has been corrected satisfactorily.
4.5 Life Test - The contractor shall furnish all samples and
shall be responsible for accomplishing the life tests. The
test shall be of 300 hours duration and shall be conducted on
equipments that have passed the individual test. The life test
shall be performed under the conditions specified in 4.5.1. The
life test sample shall be selected by the Government inspector
(Equipments which have suc-
in accordance with the following.
*
cessfully passed the initial production test, Sampling tests,
*
reliability tests, or special tests may be selected for life
*
tests.) (Test life accumulated during the reliability test may
*
be counted toward the life test provided the entire 300 hours is
accumulated on a single equipment and equipment selected is in
accordance with the table below.)
Quantity to be Selected
Quantity of Equipments
for Life Test
Offered for Acceptance
First 25
1
1
Next 175
1
Next 300
1 for each additional 500
or fraction thereof
4.5.1 Test Conditions - The life test shall be conducted under
the following simulated service conditions:
Normal room
Temperature
Normal ground (0-5000 ft.)
Altitude
Room ambient
Humidity
*
115 5 volts (at lowest applicable
A-c voltage
frequency)
*
27.5 2.O volts
D-c voltage
4.5.2 Test Periods - The test may be run continuously or inter-
Any period of operation shall be of sufficient dura-
mittently.
tion to permit the equipment temperature to stabilize. Period-
ically, the equipment shall be turned on and off several times
*
and cycled through its various phases of operation.
140
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