TM-9-2330-356-14

SEMITRAILER, TANK: 5000 GALLON, BULK HAUL, SELF LOAD/UNLOAD M967 AND M967A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, AUTOMOTIVE M969 AND M969A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, UNDER/OVERWING AIRCRAFT M970 AND M970A1

TECHNICAL MANUAL; OPERATOR’S, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL

OCTOBER 1990

TM-9-2330-356-14 - Page 166 of 528

TM 9-2330-356-14

4-10. Using the Ohms Scale

WARNING

When troubleshooting an electrical malfunc-

tion or performing electrical maintenance,

ALWAYS disconnect Intervehicular electrical

cable from semitrailer, and negative battery

cables at batteries. Failure to

follow

this warn-

ing may create a spark and explosion, result-

ing in serious injury or death to personnel.

NOTE

if the needle will not zero properly, replace

the batteries and try the zeroing procedure

SET SELECTOR SWITCH TO Xl

OHMS POSITION.

again. if the needle will not zero after you

have replaced the batteries, turn the meter in

for repair.

a.

Zero the Meter.

To obtain an accurate reading, you

must first adjust the meter so that when there is zero

resistance, the needle gives a reading of zero. Use the

appropriate procedure below for the type of meter in your

shop set.

(1)

AN/URM-105.

Use the procedure shown in

figure 4-5.

(2)

TS-352 B/U.

Use the procedure

figure 4-6.

NOW ZERO THE METER.

TOUCH THE 2 PROBES

TOGETHER

NOTE:

IF NEEDLE WILL NOT “ZERO” REPLACE THE BATTERIES.

IF THE NEEDLE STILL WILL NOT “ZERO” AFTER REPLAC-

ING THE BATTERIES, TURN THE METER IN FOR REPAIR,

Figure 4-5. Zeroing the AN/URM-105.

shown in

TA099761

4-30