56
Micro-Ohmmeter Model 6250
8.2 Measuring Resistance on Electric Motors
For this test, Kelvin probes should be used (Figure 8-2). Make contact
with each segment on the motor commutator. Allow approximately two
seconds for the display to stabilize.
Figure 8-2
8.3 Battery Strap Measurements
Proper battery strap resistance measurements will help ensure proper
voltage output. The resistance on battery strap connections should be
measured using the Kelvin probes (see Figure 8-3). Measurements must
be made with the system power turned o.
The average resistance of all the intercell connections should be
determined by totaling the individual resistances and dividing by the
number of connectors. Each individual cell resistance should not exceed
the average by more than 10%. See the manufacturer’s specications for
typical resistance values.
Battery Battery
Figure 8-3
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