-11-
*Follow the proper connection such as Fig. 3, the
LED(red) indicator will lit. This proves a correct
current circulation is under its operation.
(3) Simplied earth resistance measurement method
a. This method is recommended where an earth
resistance higher than 10Ω is measured
or where it is not possible to drive auxiliary
earth spikes. An approximate value of earth
resistance can be obtained by the two wire
system where is shown in Fig. 4.
b. Rotary to function switch to "EARTH VOLTAGE"
position and press to test. Make certain that
earth voltage is less than 10V.
c. First rotary the function switch to "200Ω"
position and press to test, read earth resistance.
If the display shows "1" (MSD), switch to "2kΩ"
position and read earth resistance.
d. The reading obtained (Rx) is an approximate
earth resistance value. There is no need for
external shorting as P and C terminals are
shorted by using the test leads specied for the
Simplied measurement.
e. Rx = Re -re
Rx = True Earth Resistance
Re = Indicated Value
re = Earth Resistance of Earth Electrode.
To Next Page
Loading...
