Chauvin Arnoux CA6423 GROUNDING METER P01127013 User Manual

2 0

NB: In the case of low value resistances, it becomes necessary to take into account the
resistance of the leads (approx. 22.5 m

Ω

/m for those supplied as accessories). To overcome

the resistance of the leads, we advise the use of a (4 pole) Earth/Resistivity Tester, on 4-wire
connection.

■

Display of a negative measurement

Reversal of rods H and E or rods S and E
Re-connect the leads correctly

■

Displayed measurement value is 

1---

Overrange (R > 2000 

Ω

)

■

Flashing of FAULT light  

8

Fault in current circuit (E - H). Flashing indicates that the voltage between the terminals E and
H is greater than 30 V

peak

.

This may mean that:
- the resistance of the current circuit between E and H is too high,
- the interference voltage in the circuit (E - H) is too high,
- the fuse is blown.
Check the rods, the leads, the connections and the fuse (see Ch.5.1.3).

■

Flashing of HIGH RESISTANCE indicator  

9

Fault in the voltage circuit (E - S). At the start of the measurement, the instrument
automatically checks the resistance between E and S. If this is greater than 50 k

Ω

, the

indicator  

9

  begins to flash. This means that the measurement is likely to be very affected by

the resistance of the voltage circuit.
NB: The indicator flashes throughout the measurement, even if the resistance falls below
50 k

Ω

 during it.

■

Flashing of HIGH NOISE indicator  

10

Presence of interference voltages in the voltage circuit. Flashing indicates noise greater than
13 V

peak

 between terminals E and S. These interference signals disturb the measurement.