Chapter 2 Measurement Procedures
• When the indicator needle indicates a value to the left of the
earth voltage check range, it means that the IR4082 has
exceeded the effective earth voltage; hence a measurement
cannot be taken.
When this happens, it is likely that a large leakage current is
flowing so please carry out insulation resistance and leakage
current tests.
• When the earth voltage contains a frequency element which is
the same as the measurement current frequency of the
IR4082, the indicator needle may fluctuate. When this hap-
pens, read the central value of the fluctuating range.
3.
Connect the red line lead to the neutral side of the breaker.
4.
Confirm that the indicator needle indicates the range of
"Earth Voltage OK"of the meter.
5.
Set the Function selector to either x1, or x10.
6.
Press the Measure key. Pull it up for continuous measure-
ments.
7.
When the indicator needle has stabilized, read the value
from the graduations of EARTH .
8.
The read value multiplied by the power of the selected
range is the measurement value (Rx + Ro).
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