Chauvin Arnoux E3N Mode D'emploi page 15

INPUT/OUTPUT MAGNITUDES
- Typical output noise level (crest to crest value): set with: Oscilloscope Tektronix 7603 drawer
7A22. BP: 100 kHz.
Frequency range
Range 10mV/A
Range 100mV/A
- Zero offset: 1 A max
The zero thumbwheel makes it possible to roughly correct this offset. The zero reset on the
measurement instrument makes it possible to obtain a finer adjustment.
NB: It is advisable to check the zero offset after having measured a high power current. To
do this, mark a reference on the oscilloscope on the GND position, then connect up on DC,
if an offset is present which is too high, this means that the clamp is magnetized.
To demagnetize the clamp, simply open and close the clamp several times without enclosing
a conductor or apply a decreasing magnetic field to it.
DISTORTION MAGNITUDES
- Battery voltage from 6.5 V to 10 V: ± 6 mA/V typical, ± 10 mA/V max
- Temperature from 0 to 50°C: ± 2000 ppm/°C max
- Position of the conductor in the window (AC signal of frequency 1 kHz): max ± 0.5% of the reading.
- External magnetic fields generated by an AC or DC current of 1A flowing in a conductor
placed in immediate proximity (see graph below).
- Errors of linearity, accuracy, temperature shift and other specifications of the oscilloscope
should be taken into account during measurement.
10
Attenuation in dB
0
-5
-10
-20
-30
-40
DC-100kHz
480µV
3mV
100
Immunity froman external conductor
against the case of the clamp
1000
Conductor parrallel
to the clamp
1 5
10 000
Frequency in Hz
Conductor perpendicular
to the clamp
100 000