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Chapter 4 Measurement Procedure
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NOTE
(6) Earthing resistance measurement
Set the range selector to a suitable position
(x1Ω ,x10Ω,x100Ω) and press the
measurement button (
PRESS ON
). While
keeping the button depressed, turn the dial
knob until the galvanometer is balanced.
(until the needle points at the center of the
scale.)
Then read the indication on the resistance dial
and multiply it with the setting of the range
selector. The result is the earthing resistance.
In general, you should first choose the
x100Ω setting of the range selector and
then reduce the setting as necessary.
If the 2/3 pole measurement selector
(
TERMINALS) is set to "2a"or"2b", correct
measurement is not possible.
Balancing the galvanometer is invalid where
no scale on the resistance dial.
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