Battery Test

TM 5-6350-262-14/4

(3) Remove cover from EOL Module and

(16) Repeat steps (14) and (15) at least twice.

disconnect one wire: this should cause tamper alarm.

(17) If steps (14) thru (16) do not result in

The VOM should change from an indication of less than

propel VOM indications (alarm outputs) perform the

2K Ohms to more than 100K Ohms.

follow- ing steps:

(4) Reconnect wire to EOL Module terminal;

(a)

Remove cover (observe tamper

the VOM should indicate less than 2K Ohms.

alarm output)

(5) Short the two EOL Module terminals: this

(b)

Turn SENSITIVITY screw index

should cause tamper alarm.

The

VOM

should

one position clockwise.

change from an indication of less than 2K Ohms to more

than OO1K Ohms.

(c)

Reinstall cover.

(Optional: pull

tamper switch plunger outward)

(6) Remove short across the EOL Module

terminals. The VOM should indicate less than 2K

(d)

Repeat steps (14), (15) and (16).

Ohms.

Note

Caution

Step (17)(b) may be repeated five

Do not tighten EOL Module

times, once for each setting on

fastener to the point of deforming

SENSITIVITY scale (fi.241

cover or can. This could cause a

(18) Refer to table 6-1 for troubleshooting procedures if

short, and result in continuous

SENSITIVITY screw adjustment cannot be obtained.

tamper alarm output

(19) Reinstall SPU cover (if applicable) when a

(7) Reinstall cover on EOL Module and

SENSITIVITY setting is reached that produces a

secure

consistent operational alarm.

Note

(8) Loosen SPU cover screws and par ially

Upon successful completion of

remove cover: tamper alarm should occur when front

Steps I thru 19, bench test of the

surface of cover has been displaced about 3/16 inch

MWS hm been completed.

(1/8 minimum, 1/4 maximums The VOM should indicate

(20) Turn off power supply. Disconnect power supply

more than 100K Ohms

and the VOM test leads.

Disconnect bench test

hookup. Place the MWS components in supply stock or

(9) Reinstall cover and secure screws;

return components to an operational J-SIIDS installation

tamper alarm should cease. The VOM should indicate

and perform functional test (par 2-9 and 2-10)

less than 2K Ohms

6-20. Battery Test

Open circuit voltage reading for a new

(10) Turn off power supply. The VOM should

MWS battery should be 1.35 volts.

change from an indication of less than 2K Ohms to more

A battery that indicates 1.1 volts or less is

than OO1K Ohms.(tamper alarm,

depleted.

(11) Remove the VOM leads and place them

A battery that has been in service 36

on terminals 5 and 6 of the SPU.

months will be replaced.

6-21. Loop Sensor Test

(12) Turn on power supply. Adjust voltage for

The functional tests in paragraphs 2-9 and

20_1 vdc Allow 5 minutes for circuits to stabilize. Turn

2-10 will demonstrate the serviceability of the loop

off power supply. The VOM should change from an

sensor.

indication of less than 2K Ohms to more than 100K

In some instances, it may be desirable to

Ohms (Operational Alarm,

know that the loop sensor wire is intact. Then, a

continuity (resistance) check of the wire would be in

(13) Turn on power supply and allow 5 minutes

order. A reading of 5 Ohms or less would show that any

for circuits to stabilize.

apparent defect lies in another part of the circuit.

(14) Remove test weapon from the rack.

6-22. PWB Assembly Test

The VOM should change from an indication of less than

Resistance

measurements

between

2K Ohms to more than 100K Ohms and return to less

terminals 1 and 2 (or 5 and 6) are definitive for no

than 2K Ohms The 100K,KOhms indication on the VOM

alarm/alarm conditions

will last between .5 second and 5 seconds (Operational

The proper values are less than 2K Ohms

Alarm),

for no alarm and greater than 1OOK Ohms for an alarm

condition.

(15) Wait at least 15 seconds, then replace

6-23. Input and Filter Assembly Test

test weapon in its rack. The VOM should change from

Serviceability of the Input and Filter

an indication of less than 2K Ohms to more than 100K

Assembly circuitry can be determined as follows:

Ohms and return to less than 2K Ohms The 100K Ohms

(1) When the SPU is operating, check the

indication on the VOM will last between .6 second and 5

output of the loop monitor signal generated with an

seconds (Operational Alarm)

6-7