Page 276 - Electromechanical Devices and Components Illustrated Sourcebook

238 Electromechanical Devices & Components Illustrated Sourcebook

Capacitor Function Test and is not suitable for determining the actual value of the
capacitor.
An analog multimeter can be used to perform a basic test on
a capacitor, as shown in Figure 13-51. The meter is set to
ohms and one probe is clipped to one lead on the capacitor to Measuring Resistance
be tested. When the other probe is touched to the opposite
lead, the needle on the meter will jump up and then settle back Using a multimeter to measure resistance is a simple matter.
down towards zero. This indicates that the internal resistance Figure 13-52 shows a basic resistance test. The meter is set to an
of the capacitor is initially nearly zero and, as it charges, the appropriate Ohms scale and the probes are connected to the leads
resistance climbs to a higher value. This is only a relative test of the resistor. The resistance reads out in ohms on the meter.

VOLTS
Analog
Multimeter 1 2 3 4 5 6 7 8 9 10
Needle
10 9 8 7 6 5 4 3 2 1 0 Movement
OHMS
Batt
ZERO ADJ BATT TEST
OFF
1 1
AC VOLTS 10 10 DC VOLTS
100 100
Set Function 1000 1000
To ohms .1 .1
AC AMPS AC AMPS
1 1
10 100K
100 10K
1K
OHMS
10A A COM V/

5 uf 10 Volt
Capacitor
to be Tested
Figure 13-51 Basic Capacitor Function Test

VOLTS
Multimeter 4 5 6
1 2 3 7 8 9 10
Resistance
10 9 8 7 6 5 4 3 2 1 0 In ohms
OHMS
Batt
ZERO ADJ BATT TEST
1 OFF 1
AC VOLTS 10 10 DC VOLTS
100 100
Set Function 1000 1000
To ohms .1 .1
AC AMPS AC AMPS
1 1
10 100K
100 1K 10K
OHMS
10A A COM V/

Resistor
to be Tested
Figure 13-52 Measuring a Resistor