Fss-9\(V\)This specification covers an ultrasonic motion signal transceiver and an ultrasonic motion signal processor which combine to form an ultrasonic motion sensor, designed to detect the motion of an intruder inside 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-52872D

APPENDIX A

TEST METHOD 1

POWER TEST

TEST APPARATUS:

Power supply, dc - constant voltage, 0 to 25 Vdc, 120 mA minimum

current, line and load regulation 0.1 percent or less, maximum

ripple and noise 5 mV P-P.

Ammeter, dc - 199 mA minimum, resolution 0.1 mA, accuracy 1

percent of reading �2 LSD (2 times value of least significant

digit), maximum voltage burden 0.3 Vdc, or equivalent analog

unit.

Voltmeter, dc - 3 1/2 digit or greater, resolution 10 mVdc ,

accuracy 0.5 percent of reading �2 LSD, or equivalent analog

meter. (Note: LSD = the smallest digit (value) that can be

read on the range setting being used).

TEST PROCEDURE:

Place the processor in operation by applying 20 �0.3 Vdc through

the ammeter to terminals TB1-7 (positive) and TB1-8. The

current shall not exceed 43 mA.

Connect 20 transceivers to TB2 of the processor. The total

current shall not exceed 110 mA.

Reverse the polarity on terminals TB1-7 and TB1-8 for 10

seconds. The current shall not exceed 1 mA.

Reconnect as in step b. The current shall not exceed 110 mA.

Measure the voltage between Test Point 7 (TP7) (positive) and

TP3 (negative) with a voltmeter. The voltage shall be 12 �1

Vdc.

Vary the voltage across TB1-7 and TB1-8 from 18 to 22 V. The

voltage between TP7 and TP3 (12 �1 Vdc) shall not vary more than

�100 mV.