MULTIMETER USAGE - Continued
Bad Voltage Drop.
Multimeter "D" is used to measure voltage drop across a bad splice connection. The voltage
reading at multimeter "D" is high (for example 7 volts). This means the resistance across this
splice is high, resulting in high voltage drop. This would cause the lamp to be dimly lit when
switch is closed.
24 - VOLT
Figure 4. Electrical General Maintenance Instructions.
Multimeter "E" is used 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 "E" will be approximately 24 volts. This means that an open
circuit or an open switch has infinite resistance, causing all voltage to be lost.