TM 5-3895-379-23
ELECTRICAL GENERAL MAINTENANCE INSTRUCTIONS
THIS WORK PACKAGE COVERS
Multimeter Usage, Relay Inspection and Test
INITIAL SETUP
Tools and Special Tools
Tool kit, general mechanic's (Item 36, WP 0220 00)
Shop equipment, general purpose (Item 30, WP
MULTIMETER USAGE
1.
General. A multimeter is used to troubleshoot the electrical system of the roller. The multimeter ohms scale is used to
test for continuity, shorts and resistance. The multimeter voltmeter scale is used to test voltage levels at any point in the
electrical system.
2.
Continuity Tests. Continuity tests are performed to check for breaks in a circuit (such as a fuse, switch, light bulb con-
nector or electrical wiring).
NOTE
If readout will not zero properly, replace batteries and repeat zeroing procedure. If readout will not zero after
batteries have been replaced, notify your supervisor.
a.
Zero Multimeter.
(1)
Set multimeter to ON.
(2)
Select OHMS.
(3)
Select LOWEST VOLTAGE/OHMS scale.
(4)
Touch black and red probes together and check for a zero indication on digital readout.
CAUTION
Before performing a continuity test, always place battery disconnect switch in OFF (TM 5-3895-379-10)
position and disconnect circuit to be tested. Failure to follow this caution may damage multimeter.
b.
Testing for Continuity.
(1)
Zero multimeter.
(2)
Connect black and red probes to both terminals of circuit being tested.
(3)
Observe readout and interpret results as follows:
(a) If readout indicates any numeric value, circuit has continuity.
(b) If readout does not indicate any numeric value, or value is over the limits of the meter, circuit is open.
