3.2 Measuring Insulation Resistance
56
3.2 Measuring Insulation
Resistance
Observe the following to avoid electric
shock and short circuits.
A. Do not use the
tester if the shutter
is broken.
B. Check Table 1
before connecting test leads to the tester.
C. Check to see if the object under test is not
live or electrically charged using a high-volt-
age detector or other similar instrument,
before connecting test leads to it.
Table 1
Check item
Result
Action
Are the
mark
and
key lamp
off?
Off
Connect test leads to the tester
and check C. above. If safe to
proceed, connect the test leads
to the object under test.
→
Go to Table 2.
Blinking
Press the
key to stop
voltage generation.
Table 2
Check item
Result
Action
Are the
mark
and
key lamp
blinking?
Not blinking
Measurement may be com-
menced
Blinking
Immediately disconnect the
test leads from the object un-
der test and turn off power to
the object or discharge the
electric charge using a dis-
charge rod.
Shutter
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