Chauvin Arnoux C.A 6115N, User Manual

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5.7.3 Error indications - Comments
Display Meaning Comments
Voltage less than 90 V
Measurement not possible, Poor connection possible
as the voltage is outside of the
nominal range
Voltage too high
Measurement not possible, Frequency above 450 Hz
frequency outside of the nominal
range
Frequency below 15.3 Hz
Measurement not possible,
The installation’s RCD
no voltage present
was tripped during measurement,
Use the R
A
function
Connection of the probe generates
Measurement not possible, voltage
a voltage in relation to the PE
between the probe
greater than 70 V, e.g.
and the PE > 70 V
parasite voltage, foreign network
Protective conductor possibly
Protective conductor defective interrupted, badly connected or live
WARNING: Danger of electrocution!
Measurement not possible The earth probe’s resistance is too
Incorrect connection of the probe high (> 15K
Ω
). The cable has a break.
Measurement not possible, Earth probe’s resistance is too
Non-compliant probe connection high. Probe not connected.
Temperature limit exceeded
After approx. 3 minutes, press the “TEST”
button again.
Measurement interrupted
Error – Restart.
Error 03 detected
If this occurs several times,
a factory inspection is necessary.
Measurement impossible Battery too low
Charge the battery
5.8 Measuring loop impedance : Short-circuit current / Fault voltage /Earth
impedance/selective Resistance
On TT, TN and IT networks, this function enables the testing of the protective systems that have been
implemented.
The instrument makes quick and easy measurement possible of the loop impedance between L and PE
(except for on an IT system) and the network impedance between L and N or L and L, as well as the
corresponding short-circuit current, on 95 - 440 V AC networks. The correct polarity of the network (L
and N positions) is automatically detected.
On a TT system, the measurement of L – PE loop impedance is a quick and practical way of measuring
the earthing resistance without having to plant a single earth testing rod! The result found is an excessive
value of the earth resistance, since it includes the distribution transformer earthing resistance and the
resistance of cables which are normally both negligible. So if the result is good, then you can be sure
that the earth is good!