MEWOI MEWOI4000, Руководство пользователя, Страница: 12 / 20

-9-
Note
Please try to insert auxiliary grounding rod into moist soil. In case of dry
soil, sand, or gravel land, it requires adding water to keep auxiliary
grounding rod inserted place wet. In case of concrete place, it shall keep
auxiliary grounding rod flat and add water, and cover wet towels on earth
ground rod before measurement.
4
．
Grounding Voltage Measurement
Please make sure testing wire plug has been totally inserted into testers
corresponding interface and it may cause measurement value error for
incomplete insert or poor contact.
The tester cannot be used for commercial power supply voltage
measurement. For special situation that needs to measure, it can only
use P, E interface to connect for measurement. It is not allowed to
measure commercial power voltage in the case of short circuit of P, C
interface. Otherwise, measuring voltage in the grounding circuit of cutout
switch may cause cutout switch start.
On measuring grounding voltage, please do not impose over 600V
voltage on measurement connectors.
On measuring grounding voltage, please do not touch measured bare
conductors in case of electric shock.
After connecting of auxiliary grounding rod and testing wire, shift
FUNCTION
rotary switch to “
EARTH VOLTAGE
” position. LCD display
voltage value to ground. Please note the measured voltage shall NOT exceed
600V.
In general, for measuring grounding voltage, it is only to connect the
testing wires corresponding to P , E interface.
Note
Before measuring earth ground resistance, firstly please
confirm voltage to ground must be lower than 10V.
Otherwise, the measurement value may cause excessive
error. At that time, firstly cut off power on measured
grounding equipment and make resistance measurement
after the grounding voltage is reduced.