7
VI. Measurement of effective resistance of earth
electrodes
BEFORE PROCEEDING MEASUREMENT, READ SAFETY
NOTES ON PAGE 1.
1. During operation if the symbol appears on the
display, replace the batteries.
2.
Short the tips of the leads and press the “TEST”
button. Adjust the 0
Ω “ADJ” turncap control to set the
reading of zero.
3. Rotate
to function switch to “EARTH WOLTAGE”
position and press to test. Earth voltage will displayed
on the LCD. When earth voltage is more than 10V, it
may result in errors in earth resistance measurement.
Accurate earth resistance measurement may not be
made.
4. Precision earth resistance measurement method :
(1) Connect green, yellow and red test leads to
instrument terminals E, P and C with auxiliary
earth spikes P1, C1 stuck into the
earth “IN A
STRAIGHT LINE “.
(Fig.1)
(2) Rotate the function switch to suitable range
then press the pushbutton to test and take the
reading.
