Current Measurements; Ac Current Measurements - BEHA Unitest 93539 Mode D'emploi

Measurements

4.2 Current Measurements

Never measure currents in uninsulated conductors
carrying more than 250 V !
Only handle test leads and probes on the grips provi-
ded. Avoid touching the probes under any circumstan-
ces.
4.2.1. AC current measurement
Turn selector switch (5) to A- (DC)
Open the clamp, and close it round the conductor.
Make sure that the clamp properly encircles the con-
ductor, and that there is no air gap between the jaws.
Read measurement result.
If the display is not visible during measurement, press
the "HOLD" (3) button to retain the display. The clamp
can then be removed from the conductor and the sto-
red value read.
24
correct current
measurement
The measurement is not
correct, the reading will be
zero, because the sum of all
currents is zero
(Kirchhoff`s 1st Law).
However, with this circuit
and a sensitive clamp
meter (for example, the
UNITEST Current Clamp
Meter CHB 3, Cat.-No.
93481), the Leakage cur-
rent of the machine can be
measured.