Salt water immersion

Page Title: Salt water immersion
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MIL-C-82631(OS)

be dropped from 1, 3, and 5 feet. A total of nine shocks shall be per-

formed. The series circuit shall be monitored, during shock, for discon-

tinuity, using a relay chatter indicator or equivalent. Discontinuities

in excess of 100 microseconds shall be considered evidence of failure.

4.5.4.3.1 At the conclusion of the shock test, the hydrostatic pressure

test of 4.5.4.1 shall be performed.

4.5.4.4 Salt water immersion. The connector, mated with Torpedo Control

Cables Mk 6 Mod 0 (LD 162420) and Mk 7 Mod 0 (LD 162531), shall be sub-

jected to a 30-day immersion test. The connector shall be attached to a

fixture so that all of the connector is immersed in sea water. The con-

nector shall be immersed for 16 hours and removed for a period of 8 hours.

The sequence shall be repeated 30 times. No fresh water rinse will be

permitted during the 30 cycles. At the conclusion of this test the con-

nectors shall be subjected to the tests of 4.5.3.2 and 4.5.3.3.

4.5.4.5 Low temperature (operating). The cable connector shall be mated

to Torpedo Control Cable Assembly Mk 7 Mod 0 and mounted in the test chamber.

The chamber temperature shall be lowered to +28 degrees F 5 degrees F and

maintained for a period of 48 hours. At the end of this time, and while

still at the test temperature, the test specimen shall be subjected to the

tests of 4.5.3.2 (Insulation resistance), 4.5.3.3 (Continuity), and 4.5.2

(Mating and unmating force).

4.5.4.6 High temperature (operating). The cable connector shall be

mated to Torpedo Control Cable Assembly Mk 7 Mod 0 and mounted in the test

chamber. The chamber temperature shall be raised to 130 degree F 5 degree F

and maintained for a period of 48 hours. At the end of this time, and while

still at the test temperature, the test specimen shall be subjected to the

tests of 4.5.3.2, 4.5.3.3, and 4.5.2.

4.5.4.7 Temperature and humidity (operating). The test unit shall con-

sist of the mated assembly of one "B" cable Mk 7 Mod 0, one cable connector

Mk 42 Mod 1 and one "A" cable Mk 6 Mod 0. Two such test units will be re-

quired. The prepared units shall then be placed in a test chamber and sub-

jected to a temperature of +122 degrees F for 2 hours. During this 2-hour

period the requirements of 4.5.3.2 and 4.5.3.3 shall be met.

(a) After 2 hours, the test units shall be subjected to five 24-hour

cycles of 16 hours at +122 degrees F and 8 hours at +86 degrees F. The

relative humidity shall be maintained constant at 95 percent during the five

cycles. While at +122 degree F the requirements of 4.5.3.2 and 4.5.3.3

shall be met.

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