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|  MIL-P-62341/2A
4.8.4.8.2 Class 2.
4.8.4.8.2.1 Internal. To determine conformance to 3.5.7.2.1, utilizing
a power supply and an oscilloscope, apply and then remove 24 + 6 V dc at
individual relay circuit terminals as shown in table VI. Verify that each
circuit voltage transient, as indicated on the oscilloscope, does not exceed
the requirements of 3.5.7.2.1.
4.8,4.8.2.2 External. To determine conformance to 3.5.7.2.2, assemble
three (3) relay mils (conforming to MIL-R-5757/23) in parallel and connect
them to the assembly pins P1-44 (positive) and P1-28 (return). Using a power
supply and oscilloscope, apply 24 + 6 V dc through the three (3) mils to
pins P1-44 (positive) and P1-28 (return). Remove the voltage from the relay
coils and verify that the dropout voltage as indicated on the oscilloscope
does not exceed the requirements of 3.5.7.2.2.
4.8.4.9 Time delay and latching circuit.
Not applicable.
4.8.4.10 Fire warning circuit.
4.8.4.10.1 Class 1. To determine conformance to 3.5.9.1, interconnect
two test lamps (conforming to MS25237-387) to the printed circuit card.
Connect one lamp to P1-16 (positive) and P1-18 (return) and connect the
second lamp to P1-26 (positive) and P1-25 (return). Apply 24 6 V dc
between P1-31 (positive) and P1-27 (return) and also supply a 1.0 pulse per
second, repetitive positive signal of 24 6 V dc amplitude between P1-32
(positive) and P1-27 (return). Use an electric timer and multimeter to
verify that both test lamps flash at the 1.0 pps rate. Interruption of the
1.0 pps signal applied to P1-32 will not deenergize the relays. Verify that
relays K1O and K11 are latched by a resistance measurement of 1.0 ohm maximum
through closed relay contacts interconnected between P1-25 and P1-27 and
between P1-27 and P1-28. The momentarily interruption of 24 6 V dc applied
to P1-31 will deenergize relay K13 and simulataneously deenergize relay K1O
and K11 resulting a resistance measurement in excess of 100 000 ohms between
P1-25 and P1-27 and between P1-27 and P1-18.
4.8.4.10.2 Class 2. To determine conformance to 3.5.9.2, interconnect
two test lamps (conforming to MS25237-387) to the assembly. Connect one lamp
to P1-31 (positive) and P1-30 (return) and connect the second lamp to P1-24
(positive) and P1-8 (return). Apply 24 6 V dc between P1-46 (positive) and
P1-23 (return) and P1-6 (return), and also apply a 1.0 pulse per second,
repetitive positive signal of 24 6 V dc amplitude between P1-2 (positive)
and P1-23 (return). Use an electric timer and multimeter to verify that the
test lamp between P1-31 and P1-30 flashes at the 1.0 pps rate and that the
test lamp between P1-24 and P1-8 illuminates steady. Interruption of the 1.0
pps signal applied ot P1-2 shall cause the flashing lamp between P1-31 and
P1-30 to extinguish while the lamp between P1-24 and P1-25 remains
illuminated. The momentary interruption of 24 6 V dc applied to P1-46
shall cause the lamp between P1-24 and P1-8 to extinguish.
Preparing activity:
Custodian:
Army - AT
Army - AT
(Project 1240-A860-02)
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