5. Simplified earth resistance measurement method :
(1) This method is recommended where an earth
resistance higher than 10
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. 2.
(2) Rotate the function switch to “EARTH
VOLTAGE” position and press to test. Make
certain that earth voltage is less than 10V.
(3) First rotate the function switch to “200
”
position and press to test, read earth
resistance. If the display shows “1”(MSD),
switch to “2000
” position and read earth
resistance.
(4) 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 specified for the
Simplified measurement.
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