Measuring With The Benning Cm - Benning CM P1 Operating Manual

Inrush current:
Measuring range
40.1 A - 400 A
Integration time: 100 ms
Threshold value of the tripping current: 5 A
7.2 DC current range (BENNING CM P2)
Measuring range
40.00 A
40.1 A - 400 A
8. Measuring with the BENNING CM P1/ P2
8.1 Preparing the measurement
Operate and store the BENNING CM P1/ P2 at the specified storage and operating tempera-
tures only! Do not permanently expose the device to sunlight.
- Strong sources of interference in the vicinity of the BENNING CM P1/ P2 might involve
unstable readings and measuring errors.
8.2 Current measurement

Do not exceed the maximum permitted voltage with respect to earth potential!
Electrical danger!
For direct current (DC) measurements (BENNING CM P2), observe correct

polarity! The arrow on the measuring clamp indicates the technical current
direction. + → –
- After switching it on, the BENNING CM P1/P2 is automatically in function A. Otherwise,
press the A key 8 .
- For the BENNING CM P2, press the A key 8 to select the desired function A
the A function, press the null balance key ∆/LPF 6 to switch the BENNING CM P2 to the
initial mode.
- Operate opening lever  , clamp  single wire live conductor centrally by means of the
BENNING CM P1/ P2 current probe.
- Read off the digital display unit J .
See figure 2: Current measurement
8.3 Voltage indicator (NCV)
The voltage indicator function is not intended for testing the absence of volt-

age. Even without an indication or acoustic signal, a dangerous contact volt-
age might be applied. Electrical danger!
The voltage indicator function is intended for non-contact detection of an alternating field.
The detector 2 is located on the measuring clamp within the  NCV  marking. Switch the
BENNING CM P1/P2 on and select the voltage indicator function by pressing the NCV key 7 .
The digital display J shows the „
acoustic signal will be emitted and the intensity of the alternating field will be indicated on the
digital display J by a maximum of 4 bars "- - - -". An indication is made in earthed AC current
networks only!
12/ 2017
Resolution Measurement accuracy (50 Hz - 60 Hz)
0.1 A
Resolution
0.01 A
0.1 A
" and "EF" symbols. If a phase voltage is localized, an
BENNING CM P1/ P2
± (3.5 % of reading + 8 digits)
Measurement accuracy
± (2.0 % of reading + 5 digits)
± (2.0 % of reading + 5 digits)

Overload protection
420 A eff.
Overload protection
420 A eff.
420 A eff.
or A. In
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