Iso-Tech IDM 103N Instruction Manual page 15

Measuring Resistance
 Caution
To avoid possible damage to the Meter or to the equip-
ment under test, disconnect circuit power and discharge
all high-voltage capacitors before measuring resistance.
Note – The Meter provides a open voltage ≦–1.5V to the
circuit under test that cause the diode, transistor junction to
conduct so it is batter to disconnect the resistance from the
circuit to get a correct measurement.
The resistance of test leads is about 0.1Ω ~ 0.2Ω. To test the
leads resistance, touch the probe tips together. For accuracy
measurement in low resistance use the relative features to
zero the test leads resistance.
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