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3.10 STARTING CURRENT OR OVERCURRENT (TRUE INRUSH)
MEASUREMENT
To measure a starting current or overcurrent, proceed as follows:
1.
Set the switch to
then encircle only the conductor concerned with
the clamp.
2.
Effect a long press on the
key. The InRh symbol is displayed,
then the triggering threshold. The clamp then awaits detection of the
True-Inrush current.
"------" is displayed and the "A" symbol flashes.
3.
After detection and acquisition for 100 ms, the RMS value of the True-
Inrush current is displayed
along with the PEAK+/PEAK- values
subsequently.
4.
A long press on the
key or a change of function leads to exiting
from the True-Inrush mode.
Remark :
the triggering threshold in A is 10A if the initial current is zero (starting of
installation); it is that set in the configuration (see §
) for an established current
(overload in a installation)..
3.11 FREQUENCY MEASUREMENT (HZ)
The frequency measurement is available in V and A for AC quantities. The
measurement is based on a count of the passages of the signal through zero
(positive-going edges).
3.11.1 Frequency measurement in voltage
To measure the frequency in voltage, proceed as follows:
1.
Set the switch to
and press the
key. The Hz symbol is
displayed.
2.
Select AC by pressing the yellow
key until the desired choice is
reached.
3.
Connect the black lead to the COM terminal and the red lead to “+”.
4.
Place the test probes or the crocodile clips on the terminals of the
circuit to be measured.
Summary of Contents for F401
Page 1: ...F401 Clamp multimeter GB User s manual...
Page 38: ...692885A02 Ed 7 08 2016...
