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|  MIL-P-48606B(AR)
4.7.1.5
Immersion (non-operating).
This test shall be
performed as
specified in Procedure I, Method 512 of MIL-STD-810 as
modified by
3.3.5 herein. The operational checkout shall be as
specified in
4.7.2 and 4.7.3 for compliance with 3.3.5.
4.7.2 Electrical. Continuity shall be inspected by standard
measuring equipment and visual examination for compliance with 3.4.
4.7.3 Performance. The power supply assembly shall be tested
as follows using the DMM (Item 2, Table V) except when other test
equipment is specified.
4.7.3.1 Initial voltage adjustments. Using power supply (item
1, Table V) apply an input voltage of +24.0 + 1 Vdc between pins
I(+) and H(RET). Using lead resistors (item 5, Table V) to produce
the load currents delineated in Table I, adjust the power modules
using the internal adjustment potentiometers to the voltages shown
in Table I. Subsequent performance testing shall require no
readjustment of the power modules.
4.7.3.2 Power drain. With the input voltage set to 18.1 +/-
0.1 Vdc and using load resistors to produce the maximum load
currents as specified in Table II, use the current probe (item 3.
Table V) in conjunction with the DMM to verify that the input
current does not exceed 14 amps steady state as required in 3.5.2.
4.7.3.3 Output short circuit protection. With the input
voltage set to 24.0 +/-1 Vdc and using load resistors to produce the
load currents as specified in Table I. place a short circuit across
each output for at-least 30 seconds. Verify that the output voltage
returns to the values specified in Table I when the short circuit is
removed as required in 3.5.3.
4.7.3.4 Regulation.
4.7.3.4.1 Line effect regulation. With the input voltage
initially set to 24.0 +/- 1 Vdc and using load resistors to produce
the nominal load currents as specified in Table II, verify that the
output voltages do not change more than +/- 0.5% when the input
voltage is adjusted to 18.1 +/- 0.1 Vdc and then adjusted to 29.9
+/-0.1 Vdc as required by 3.5.4.1.
4.7.3.4.2 Load effect regulation. With the input voltage set
to 24.0 +/- 1vdc and initially using load resistors to produce the
nominal load currents as specified In Table II, verify that the
output voltages do not change more than +/- 0.5% when the load
resistors are changed to values that produce the minimum load
currents per Table II and then changed to values that produce the
maximum load currents per Table II as required by 3.5.4.2.
12
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