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TM 5-2410-233-23
ELECTRICAL GENERAL MAINTENANCE INSTRUCTIONS - CONTINUED
0177 00
MULTIMETER USAGE - CONTINUED
(2)
Bad Voltage Drop.
(a) Example D shows how to measure voltage drop across a bad splice connection. The voltage reading at
multimeter is high (for example 7 volts). This means the resistance across this splice is high, resulting
in high voltage drop. This would cause lamp to be dimly lit when switch is closed.
EXAMPLE D
24 - VOLT
BATTERY PACK
BAD SPLICE
CONNECTION
SWITCH
LAMP
(CLOSED)
386-596
(b) Example E shows how to measure voltage drop across an open circuit, in this case an open switch.
This could also be used to demonstrate the reading in a circuit with a broken wire. The voltage reading
at multimeter will be approximately 24 volts. This means that an open circuit or an open switch has
infinite resistance, causing all voltage to be lost.
EXAMPLE E
24 - VOLT
BATTERY PACK
SWITCH
LAMP
(OPEN)
386-597
0177 00-8

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