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|  MIL-I-46390(MU)
4.4.1.1 Devices used for environmental
such use will not unduly interfere with the
testing. All environmental testing devices
contractor's delivery schedule.
used to determine conformance of the en-
vironmental requirements (listed below)
4.4.1 Contractor design. The contractor
shall conform to the "Test Facilities" re-
shall design and supply inspection equip-
quirements outlined in Specification MIL
ment compatible with the "Test Methods
F-13926; except Moisture-Fungus Resist-
and Procedures" specified in 4.5, and with
ance (see MIL-T-152).
the "Component Inspection" requirements
of Specification MIL-F-13926. Concept,
(a) Vibration.
construction, materials, dimensions, and
tolerances used in design of test equipment
(b) Shock.
shall be so selected and controlled as to in-
sure that the test equipment will permit
(c) Temperature.
positive rejection of a product which ex-
(d) Humidity.
ceeds the prescribed tolerance limit, and
will reliably indicate acceptability of a pro-
(e) Moisture-Fungus Resistance.
duct which does not exceed 90~0 of the
prescribed tolerance limit. Construction
4.4.1.2 In addition to the above men-
tioned requirements the following test
shall be such as to facilitate routine calibra-
equipment accuracies shall also apply.
tion of the equipment.
Item
Accuracy
Min. Amperage - 5 amps. Positive & Negative ter-
(1) Power supply O-50V dc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
minals required. Voltage accuracy (output) 5%.
all meter readings taken during the inspection shall
(2) Voltmeter 0-50 V . . . . . . . . . . . . . . . . . . . .
fall within 30 to 80% of the scale range. The
overall scale range shall have an accuracy of
plus or minus 2 percent.
ohms to 5000 megohms.
.02
Continuity checker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(3)
Dual channel fast sweep
...............................................................
U sec\cm sensitivity 10
Oscilloscope
(4)
1
MV\C31.
Standard type push button On and Off for operat-
Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(5)
ing within a voltage range between 5 to 28 V
dc, 17 amps.
3.5.1 shall apply. At the conclusion of this
4.5 Test methods and procedures.
test the interconnecting box shall be visu-
ally inspected as outlined below prior to
4.5.1 Environmental tests.
being subjected to the remaining acceptance
tests.
4.5.1.1 Vibration. This test shall be the
first test performed prior to performing the
4.5.1.2 Post vibration.
Subsequent to
remaining acceptance inspection tests (see
vibration, the interconnecting box shall be
Classification of Defects, Table I) and the
thoroughly inspected for physical defects
cover shall be removed prior to performing
resulting from poor workmanship and ma-
this test. The test conditions specified in
7
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