Chauvin Arnoux C.A 6456 Notice De Fonctionnement page 256

=> Cut off power to the inst Cut off power to the inst Cut of
=> 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.
T To make a 2P 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. The measurement proceeds in the same way as a 3P measurement. The measurement proceeds in the same way as a 3P
4.2.4 MEASUREMENT RESULTS MEASUREMENT RESULTS MEASUREMENT RESUL
After the measurement, the measured values and complement Af After the measurement, the measured values and complement
and and and keys. keys. 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
R
Initial display
H
R
E
Pressing the Pressing the Pressing the or or or
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allation and disconnect the earth of the installation
or 3P or 3P.
and U
HE
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(1 press)
st
H
z
U
HE
key once more causes a return to the initial display. key once more causes a return to the initial display key once more causes a return to the initial display
60
. If the measurement is possible, the
SE
ary results can be consulted using the
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(2 press)
nd
(3 (3 press) press)
nd
R
R
E ALARM
∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ ∆ E
-------
U
L