Hioki Analog MO HiTESTER IR4011, Instruction Manual, Page: 81 / 104

21 Chapter 2 Measurement Procedures
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It is necessary to conduct an earth voltage check before
measuring the earth resistance.
• When the instrument is connected to the Line-Earth section of
the live conductor with the MEASURE key pressed down, the
leakage breaker will be triggered and the power supply will be
cut off. Do not connect the instrument to the Line-Earth sec-
tion. Accidentally connecting to the live conductor will trigger
the protection circuit. It takes approximately 5 seconds before
measurement can be conducted again.
• As the earth leakage circuit breaker and leakage relay with
current sensitivity below 5 mA may operate, do not use this
measurement method in places where they are placed.
• The AC resistance measurement function is a function to
measure the earth resistance of a small inductance. There-
fore, accurate measurements may not be obtained when
measuring resistances with an inductance of more than 3 mH
connected in series.
1.
Set the Function selector to Earth Voltage.
2.
Connect the black earth lead to the earth electrode you
wish to measure.
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