Chauvin Arnoux C.A 6410 Notice De Fonctionnement page 46

Variations in the nominal working range
Influence Limit of
parameter operating
range
Temperature - 10 °C to
+55°C
Relative humidity 10 % RH to
90 % RH
Battery voltage 6.5 to 9.5 V
Conductor position from edge
in centre
Clamp position ± 180 °
Proximity of earth 1 mm steel sheet
magnetic against jaw gap
Magnetic field
30 A/m
50/60 Hz
Frequency 47 ... 800 Hz
Disturbing current
50 ... 60 Hz (I + I
meas.
in the loop (2) x R
loop
Peak factor (3) 1.4 to 2.5
2.5 to 5
(1) P = Precision defined in the reference conditions for the measuring range considered
R = Resolution defined for the measuring range considered
% L = Error expressed as a percentage of the reading (L)
Example: For a measured value of 25 Ω at 20°C, the maximum influence of temperature is:
[0.05 Ω + (1.5 x 0.015 x 25)] / 10°C ±0.1 Ω or 0.61 Ω / 10°C ±0.1 Ω
(2) The disturbing current at 50/60 Hz maximum is approximately 3.5 A for low loop resistance values (< 10 Ω ).
Above approximately 40 V (at 50/60 Hz) in the measuring loop, the NOISE symbol comes on..
(3) Limited to 40 A peak
Parameter
influenced
A
Ω (0.05 Ω + 0.5 P)/10°C
A
Ω
A and Ω
A
Ω
A and Ω
Ω
Ω and A
A
Ω
)
disturb.
≤ 40 V
A
46
Influence (1)
typical Max.
0.5 P/10°C 1.5 P/10°C + R
(0.05 Ω +1.5 P)/10°C + R
0.5 P P + R
0.05 Ω + 0.5 P 0.05 Ω + P + R
0.1 P 0.25 P + R
0.05 P 0.2 P + R
0.05 P 0.1 P + R
0.1 P 0.2 P + R
0.1 P 0.5 P + R
0.05 P 0.1 P + R
2 P 3 P + R
3 % L 5 % L + R
For I ≤ 1 A
= 30 Ω
With R
measured
1 P 1.5 P + R
2 P 2.5 P + R