3.2 Measuring Insulation Resistance
62
10.
Read the indication.
• If the indication is unstable, press the
key.
The average of the measurements is shown.
• Resistance indication is switched to leakage current
indication by pressing the
key.
❖
See 3.2.5 "Switching to Leakage Current Indication" (page
68).
• When the timer has been set, remaining time is dis-
played.
❖
See 4.1 "Using Timer" (page 79).
Do not allow test leads to contact each other
or place objects on test leads, to avoid mea-
surement errors and malfunctions.
• Be sure to clean test leads after use. If test
leads are soiled, they may deteriorate.
• Insulation resistance is unstable. The
indication may not stabilize with some
objects.
• Due to factors such as capacitance of
objects under test, resistance values may
start low, then rise gradually and settle out.
• During measurement, if the resistance of
the object suddenly drops or if the test
lead tips are short-circuited, the tester
stops voltage generation as a safety
measure. (This applies to a test voltage of
1.1 kV or more.)
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