Hioki IR3455, Instruction Manual

Page: 69 / 184

3.2 Measuring Insulation Resistance
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付録
索引
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• When measuring insulation resistance,
dangerous voltage is applied to the
measurement terminals. To avoid elec-
tric shock, do not touch the terminals
and test leads.
• Do not touch the object under test or
disconnect the test leads after measure-
ment has been completed until the auto-
matic discharge function is completed.
Electric shock may result due to high
voltage and stored charge.

See 3.2.4 "Automatic Discharge Function" (page
73).
• Power of the instrument may be turned
off during measurement even if the
key is not pressed, for instance,
due to battery consumption. In such
case, the automatic discharge function
may not operate. Discharge the object
under test using a discharge rod for
high voltage.
• To avoid damage to objects under test, be
sure to check the test voltage before
starting measurement.
• When repeating measurement, press the
key before next measurement to check
the test voltage.
• To avoid damage to the instrument during
discharge, do not measure the insulation
resistance between the terminals of
capacitors (with a capacitance of over 4

F).
• To avoid damage to the instrument, do not
short-circuit the tips of the clips of the red
test lead (+ terminal) and the blue test lead
(GUARD terminal).