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After powering on, if the LCD shows a low battery voltage symbol
“
”
,
it indicates that the battery is running low. Please charge it in time. The
battery power is sufficient to ensure the accuracy of the measurement. When
the battery power decreases, the power indicator bar decreases.
3
．
Ground Voltage Measurement
One auxiliary grounding rod is required for the ground
voltage test.
As long as the instrument is connected to the ground
through the test wire and the auxiliary grounding rod, the
other test wires of the instrument interface cannot be
connected to the L and N wires of the commercial power
supply. Otherwise, the leakage may occur, and the circuit
breaker may start up and be dangerous.
Ground voltage test cannot exceed 100V
。
Grounding voltage: when the ground fault of the electrical equipment
occurs, the potential difference between the grounding device casing, the
grounding wire, the grounding body and the zero potential point, the
grounding voltage is the earth's reference point, potential difference with
the earth, the earth is zero potential point.
An auxiliary grounding rod is required for the ground voltage test. Note
the difference from the commercial AC voltage test. See the following figure:
After the meter, auxiliary grounding rod and test line are all connected,
after power on, press function button U, and the LCD shows the test result.
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
Summary of Contents for ES3001
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