If the plug is not fully inserted or contacted, the measurement
value may be incorrect.
This instrument can not be used for commercial power supply
voltage measurement, special circumstances need to measure, only
can use the S and E interfaces connect to measure, the commercial
power supply voltage cannot be measured when the H and S
interfaces are shorted. Otherwise, the voltage is measured in the
ground loop of the circuit breaker and the circuit breaker may
start.
Do not apply more than 100V across the measurement interface when
measuring ground voltage.
When measuring ground voltage, do not touch exposed conductors
to avoid electric shock.
After the auxiliary grounding rod and test line are connected, switch
the function button U to the voltage level, the LCD displays the ground voltage,
and the measured voltage to ground cannot exceed 100 V.
Under normal circumstances, measure the ground voltage and connect only
the corresponding test lines of the S and E interfaces. As shown:
When measuring the grounding resistance, first confirm that the
voltage to the ground must be less than 10V. If the voltage is
more than 10V, the measured value of the grounding resistance
may cause an error. At this time, the grounded device shall be
powered off first. After the ground voltage drops, measure the
ground resistance again.
4．Wire resistance check
In order to improve the precision and stability of the grounding
resistance measured in the field, the error caused by the change of the wire
resistance due to the test line being used for a long time is avoided; To
avoid the error caused by the test line not completely inserted into the
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