The simple method measures the grounding resistance. The instrument
reading value is the sum of the grounding resistance of the measured grounding
body and the grounding resistance of the commercial grounding body. That is：
RE=RX＋re
And： RE is the meter reading value；
RX is the grounding resistance value of the grounding body under
test；
re is the grounding resistance value of a common grounding body such
as a commercial power system.
Then, the grounding resistance of the measured grounding body is：
RX=RE－re
Use a simple method to measure the grounding resistance, and try to select
the grounding body with a small re value as the auxiliary grounding electrode
so that the meter reading is closer to the true value. When measuring, please
choose metal water pipe and fire hydrant as auxiliary ground electrode。
Simple method to measure the grounding resistance, also need to
confirm that the voltage to the ground must be below 10V. If the
voltage is above 10V, the measured value of the grounding
resistance may have errors. At this time, first power off the
device of the grounding body under test. Measure the grounding
resistance after the grounding voltage drop..
7．Backlight Control
After power on, press “ ” key to turn the backlight on or off, and
the backlight function is suitable for dim places. The default backlight turns
off every time you turn it on.
8．Alarm Setting
After power on, short press “ ” to turn on and off the alarm function.
Short press "SET" key to set the resistance alarm value, press " " key to
move the cursor, press " " or " " key to change the current size, and
then press "SET" key to save and exit. When the measured value is greater
than the alarm critical setting value and the alarm function is turned on,
the meter displays the " " symbol and issues a “beep-beep-beep--” alarm
sound.
9．Data Lock/Storage
After the power-on or measurement is completed, short press "MEM" key
to lock the current display data,and automatically numbered and storage. If
the memory is full, the meter displays the "FULL" symbol. As shown below:
To Next Page
Loading...
