Testing Potentiometers - Fluke 91 Series II User Manual

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TESTING POTENTIOMETERS

The ScopeMeter test tool can provide a numeric readout
and a graphic display of resistance. Using the COM (black)
and Ω (red) 4-mm banana inputs, connect the test tool to
the wiper and one end of the variable resistance to be
tested. Use the multimeter test lead set to connect. This
signal is not available on the Demo Board.
To select the ohms mode:
1. Reset the ScopeMeter test tool (
2. Press to select the
A message appears, indicating that the banana jacks are
used as inputs now. After closing this message, the display
should be similar to Figure 8-2, but the value will depend
on the potentiometer that is used.
Once the reading is stable, vary the resistance (adjust the
potentiometer) and observe the movement on the wave-
form display underneath the reading. Spikes on the display
indicate discontinuities in the potentiometer. The resistance
trace display enables quick testing of potentiometers and
shows discontinuities immediately.
Remove the variable resistor from the banana jacks.
+ ).
mode.
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Figure 8-2 Testing Potentiometers
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