Fss-9\(V\)This specification covers a receiver and a processor which combine to form a passive ultrasonic sensor, designed to detect the sounds of forced entry into a protected space.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22

MIL-DTL-52869C

APPENDIX A

TEST METHOD 4

TAMPER SWITCH TOLERANCE TEST

TEST APPARATUS:

Ohmmeter - Accuracy 3 percent.

b. Test covers - Covers with hole for meter lead access, for processor

and receiver.

TEST PROCEDURE:

2.1

Processor.

Connect an ohmmeter across processor tamper terminals TB1-5 and

TB1-6.

b. Place the test cover on the processor. The resistance across the

tamper terminals TB1-5 and TB1-6 shall be less than 10 ohms.

c. Raise the cover of the processor more than .062 inch but less than

.250 inch (flanges shall be engaged). The resistance between TB1-5 and TB1-6

shall increase to greater than 100K ohms.

d. The resistance between TB1-5 and TB1-6 shall be greater than 100K

ohms when the cover is removed.

e. Pull the tamper switch fully out and lock. The resistance between

TB1-5 and TB1-6 shall decrease to less than 10 ohms.

2.2

Receiver.

Connect an ohmmeter across receiver tamper terminals TB1-5 and TB1-6.

b. Place the test cover on the receiver. The resistance across the

tamper terminals TB1-5 and TB1-6 shall be less than 10 ohms.

c. Raise the cover on the receiver more than .062 inch but less than

.250 inch (flanges shall be engaged). The resistance across TB1-5 and TB1-6

shall increase to greater than 100k ohms.

d. The resistance between TB1-5 and TB1-6 shall be greater than 100k

ohms when the cover is removed.

e. Pull the tamper switch fully out and lock. The resistance between

TB1-5 and TB1-6 shall decrease to less than 10 ohms.