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Operation Instruction
4. Operation Instruction
Danger
In measurement of earth voltage, do not exert voltage above AC220V on the measurement port.
In measurement of earth resistance, there will occur potential of about 50 V between port E and S
or between ports E and C, therefore, protect yourself from electrical shock.
Before using the meter, check the electricity in the battery by turning on the meter, checking if there
is "
" on display and replace the battery by following the steps described in Chapter "Replace-
ment of the battery" if the symbol exists.
4.1. Measurement of earth voltage
Rotate the switch to ~VE position, insert the end of meter cable into sockets E and S, with another
end of meter cable connected to either end of voltage source or resistance load in parallel way to
measure . If there exists voltage, it will be displayed on LCD.
4.2. How to measure earth resistance by Bi-pole method
Existing earth pole, such as buried metals (metal water pipe etc) , common earth of the commercial
power supply or lightning rods of high buildings, instead of auxiliary earth bars are used as auxiliary
pole in this method.
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