Chauvin Arnoux C.A 6456 Manual De Instrucciones página 60

=> Cut off power to the installation and disconnect the earth of the installation
=> Set the switch to 2P or 3P.
=> Then connect the measuring cables to the instrument and to the rods, complying with the following
distances and connections (example of connection for 3P measurement).
Remark : to be sure that rod S is located in a zone that is not influenced by other earth electrodes, move it
( 10% of the distance and repeat the measurement. The result must not change or just from few %.
4.2.3 MEASUREMENT PROCEDURE
Press the TEST key. The instrument measures voltages U
instrument checks the resistances of rods S and H: if they are correct, the instrument makes the measurement
and displays it.
To make a 2P measurement, plant a single rod and connect the measuring cables to terminals H and E of the
instrument. The measurement proceeds in the same way as a 3P measurement.
4.2.4 MEASUREMENT RESULTS
After the measurement, the measured values and complementary results can be consulted using the
and keys.
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(The quantities accessible before the measurement is made are described in § 4.1.4)
Parameters accessible in the 2P setting :
Initial display
Initial display
Pressing the or
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(1 st press)
R
H
H
z
R
U
E
HE
key once more causes a return to the initial display.
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and U . If the measurement is possible, the
HE SE
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nd
(2 press)
R
E ALARM
-------
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nd
(3 press)
R
∆ ∆ ∆ ∆ ∆ E
U
L