50
Simplied Measurement for Earth Resistance
(Simplied Measurement Method, Two-pole Method)
• When appears, a large earth potential (10 V rms or 14.3 Vpk or
higher) exists between the earth and the N (neutral) side of commercial
power supply. A large leak current may be flowing through the earthing
electrode of the measuring object or through the earthing element of the
commercial power supply used for measurement.
Therefore, conduct an
insulation resistance test or leakage current test etc. In addition, disconnect
any electric equipment from the earthing electrode.
• This device automatically detects AC/DC of the earth potential.
• If AC/DC needs to be switched during earth potential measurement, it
can
be switched by pressing
DISPLAY
button.
• After measurement of earth resistance, press DISPLAY button while
is lit up so that the earth potential will be displayed.
When
is lit up, press Fn button so that the retained value is
unlocked and the current earth potential will be displayed.
• When
is on, or when (live wire warning LED) is blinking, it is
not possible to execute earth resistance measurement.
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