Current Measurements - Meterman AC50 Manual De Uso

Current Measurements

If tangible dangerous active parts are present in the plant where you are ma-
king measurements, individual protection equipment (e.g. suitable covers)
must be used.
Always hold the instrument below the handle shroud.
The respective accident prevention regulations established by the professional
associations are to be strictly enforced at all times regarding tasks executed
under voltage or in proximity of parts under voltage.
1) Turn selector switch (2) to the AC current range you need
2) Open the clamp, and close it round the conductor. Make sure that the clamp pro-
perly encircles the conductor, and that there is no air gap between the jaws. For
best measurement results and highest accuracy, have the conductor placed in
center of clamp jaws.
For incorrect measurement, the display equals zero. In compliance with the Kirch-
hoff's current law states the sum of all currents equals zero. However, this measu-
rement layout in conjunction with a very sensitive current clamp can be used to mea-
sure leakage currents.
I
OK
I
I
OK
I + (-I) = 0
6
OK
Kirchhoff