TM-9-2320-387-24-1

TRUCK, UTILITY: S250 SHELTER CARRIER, 4X4, M1113

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE, VOLUME 1

DECEMBER 1997

CHANGE 1

TM-9-2320-387-24-1 - Page 553 of 1205

TM 9-2320-387-24-l

1 2-46.

STEIICE-R

TEST PROCEDURES

(Cont’d)

I

DC CURRENT 0 TO 1,500 AMPS TEST #90

Description:

Pre-Test Procedures:

This procedure measures

DC

current in the range of

0 to 1,500 amps. The VTM is used as an ammeter

with the decimal point in the right position. This test

may be done with the vehicle/equipment

operating.

Test requires the use of the TK adapters and

transducers.

Typical Applications:

Control Functions:

l

Alterator output

l

Average starter current

l

Battery current

9 Any DC current up to 1,500 amps

Test Procedure:

Possible Error Messages:

1.

2.

3.

4.

5.

6.

7.

8.

Connect test probe cable W4.

Attach Pl to J2 or J3. Connect the current

probe to P2.

Set TEST SELECT switch to 90.

Clamp probe to de-energized

wire.

Press and hold TEST button until CAL appears

on display.

Release TEST button and wait for offset value

to appear on display. If offset is within 225 to

-225, proceed. If not, go to DCA

Troubleshooting

Procedure.

Energize circuit. Press and release TEST

button.

Observe displayed value. A negative reading

indicates the probe is backwards.

Reverse and

repeat from Step 4.

Run confidence test.

01, 02, 03,04.06

EOO2 Transducer

not connected.

EOOS Offset not

performed.

2-507