Operation - Chauvin Arnoux D38N Mode D'emploi

„ Set the switch to the highest range.
„ Connect the clamp to the measuring instrument.
If it is not possible to power down the installation, the clamp must be set up and withdrawn in
strict compliance with the applicable safety instructions.
The clamp must always be connected to a measuring instrument before enclosing a conductor.
„ Open the clamp's jaws by bringing the arms closer together. Enclose the conductor(s) carrying the
current to be measured. Close the jaws by lightly clicking them together.
For optimum measurement quality, centre the conductor as precisely as possible in the middle
of the jaws. Make sure the conductor is perpendicular to the jaws.
As far as possible, keep away from other conductors which could generate spurious fields.
„ Read the measurement on the instrument and apply the reading coefficient to the measurement in V
Clamp
D38N 30 A
300 A
3,000 A
If necessary, withdraw the clamp from the conductor, change the range and then reposition on the
conductor.
„ When you have finished measuring, remove the clamp from the conductor and then disconnect the
oscilloscope.

2. OPERATION

range
ac
range
ac
range
ac
Coefficient
10 mV / A
1 mV / A
0.1 mV / A
16
ac
x 10
x 1
x 0.1
.