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| MIL-P-46320C(MU)
direct current to the input terminal of the
4.8.1.17 Input voltage. The following tests
power supply. Subsequent to the applica-
shall be conducted with the specified input
tion of this voltage the power supply shall
voltage applied to the input terminal of
show no evidence of damage, and shall meet
the power supply. The low impedance power
the requirements specified in 3.8.2.
source supplying the input voltage shall be
connected through a control device that shall
be capable of maintaining a constant input
4.8.1.11 Input impedance. Energize the
voltage to the power supply. Unless other-
power supply with a 1.5 volt (Series c)
wise specified, the input voltage to the power
type BA42 dry cell battery and apply an
6
supply shall be 1.52 volts dc (direct current)
output load current of 1 x 10- to the power
during all tests. These tests shall be per-
supply. The minimum measured output volt-
formed in a controlled atmosphere to avoid
age of the power supply shall be 14.0 KV
any adverse affect of temperature and
direct current. Voltage measurements shall
humidity on the test circuitry. A suggested
be measured with standard measuring equip-
method for minimizing the effects of humid-
ment.
ity on the test circuitry is shown on figure 2.
4.8.1.12 Output polarity. This test shall
4.8.1.17.1 Input current. This test will be
be conducted with standard measuring
conducted concurrent with tests specified in
equipment. Output polarity of the power
supply shall conform to the requirement 4.8.1.17.2.1. The measured current drawn by
the power supply shall not exceed the mil-
specified in 3.8.4.
liampere value specified for the tempera-
ture indicated, when the input voltage and
4.8.1.13 Short-circuit protection. When
output load current to the power supply is
energized, the power supply shall be sub-
varied as required. Input current shall be
jected to a directed short circuit for the time
measured by use of standard measuring
period specified. After removal of the short
equipment.
circuit, the power supply shall show no
evidence of damage, and shall meet the re-
4.8.1.17.2 Output characteristics. Output
quirements specified in 3.8.5.
characteristics shall be tested with a special
testing device. A suggested method of con-
4.8.1.14 Intermittent operation. The power
struction of the device is shown in figures
supply shall be observed for spasmodic or
intermittent operation during the tests spec- 1 and 2. The device shall contain a means
ified in 4.8.1.17. Any evidence of spasmodic for varying the input voltage as required.
or intermittent operation shall be cause for
rejection.
4.8 .1.17.2.1 Output voltage regulation.
This test shall be conducted when the power
supply is thermally stabilized at the speci-
4.8.1.15 High voltage breakdown. The
power supply shall be observed for high fied temperatures. When the value of output
load current is as indicated, the measured
voltage breakdown during the tests specified
output voltage of the power supply shall
in 4.8.1.17. Any evidence of corona, arcing
be within the applicable values shown in
or spraying shall be cause for rejection.
table I through III.
4.8.1.16 Operability. The power supply
4.8.1.17.2.2 Output voltage relating to in-
shall be subjected to the cycling operation
put voltage. When the input voltage to the
specified. Upon completion of the cycling
power supply is varied under the three out-
operation, the power supply shall be sub-
jected to the subsequent tests and shall
put load conditions indicated in table IV,
meet the requirements specified in 3.10.
the measure output voltage of the power
8
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