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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
jaws around the conductor to be measured.
2.
Perform a long press on the
displayed, along with the triggering threshold. The clamp then awaits
detection of the True InRush
symbol flashes.
3.
After detection and acquisition for 100 ms, the RMS value of the True
InRush
PEAK+/PEAK- values subsequently.
4.
A long press on the
switch will exit the True InRush
NOTE: The triggering threshold in A is 10A if the initial current is zero (starting of
installation). For an established current (overload in an installation) see §3.4.3.
3.11
FREQUENCY MEASUREMENT (HZ)
The frequency measurement is available in V and A for AC measurements. The
measurement is based on a count of zero crossings (positive-going edges).
3.11.1 Frequency Measurement (V)
To measure the frequency in voltage, proceed as follows:
1.
Set the switch to
2.
Select AC by pressing the
is reached.
3.
Connect the black lead to the COM terminal and the red lead to the "+"
terminal.
4.
Connect the test probes or the alligator clips to the circuit to be
measured.
, correct the DC zero (see §3.9.2), then clamp the
®
current is displayed. Pressing the
and press the
button. The InRh symbol is
®
current. "------" is displayed and the A
button or a change of function on the rotary
®
mode.
button. The Hz symbol is displayed.
(yellow) button until the desired choice
27
®
button will display the
)
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