General Information - Benning CM P1 Bedienungsanleitung

5.

General information

5.1 General information on digital current clamp meter
5.1.1 The digital display J is designed as a 4 digit liquid-crystal indicator with 10 mm digit
height and decimal point. The highest value displayed is 4200.
5.1.2 The polarity indication on the digital display J works automatically. Only a polarity con-
trary to the technical current direction is indicated with "-" (see arrow on the measuring
clamp).
5.1.3 In case of a range exceedance (overflow), "0L." is displayed.
Attention: no display or warning by complete overload.
5.1.4 The BENNING CM P1/P2 is switched on or off by pressing the ON/OFF key 9 . To
switch it off, press and hold the key 9 for approx. 2 seconds. If the BENNING CM P1/
P2 is switched on, the display illumination can be enabled by pressing the key 9 . It is
switched off by pressing the key again or automatically after approx. 10 seconds.
5.1.5 The selection of the measuring range is automatic.
5.1.6 The H/INRUSH key (blue) 5 has two functions:
Pressing the H/INRUSH key 5 stores the measuring result. The "HOLD" symbol simul-
taneously appears on the display J . Press the key 5 again to switch the device back
to measuring mode.
In measuring mode "A AC", press the H/INRUSH key 5 for approx. 2 seconds to enable
the inrush current measurement. At the same time, the digital display J shows the
"INRUSH" symbol. Here, the measuring process is initiated for 100 milliseconds after
a current (> 5 A) is applied. The averaged value of this time period is displayed. Press
the key 5 for approx. 2 seconds again to switch the device back to normal measuring
mode.
5.1.7 The ∆/LPF key 6 has two functions:
Pressing the ∆/LPF key 6 enables the low-pass filter with a limiting frequency of
approx. 160 Hz. At the same time, the digital display J shows the "LPF" symbol. Press
the key 6 again to switch the device back to the normal mode.
In measuring mode "A DC" (BENNING CM P2), press the ∆/LPF key 6 for approx.
2 seconds to carry out a null balance. It can also be used for differential measurement
(null balance is possible for any value!). This is shown by means of the "∆" symbol on
the digital display J . Press the key 6 again to switch the device back to the normal
mode.
5.1.8 NCV key 7 :
Pressing the NCV key 7 enables the voltage indicator function (localization of AC volt-
ages to earth). At the same time, the digital display J shows the „
(see 8.3). Press the A key 8 to switch the device back to the current measuring
range.
5.1.9 A key 8 :
Press the A key 8 to select the current measuring range. With the BENNING CM P2,
you can toggle between the current types "DC" and "AC" by pressing the key 8 again.
5.1.10 The measuring rate of the BENNING CM P1/ P2 amounts nominally to 2 measurements
per second for the digital display.
5.1.11 The BENNING CM P1/ P2 switches off automatically after approx. 15 minutes (APO,
Auto-Power-Off is activated, if the
matic switch-off can be disabled by pressing the H/INRUSH key 5 and by switching on
the BENNING CM P1/P2 via the ON/OFF key 5 . The
display J .
5.1.12 The BENNING CM P1/ P2 is supplied by two 1.5 V batteries (IEC LR03/ AAA/ micro).
5.1.13 If the battery voltage drops below the specified operating voltage of the BENNING CM
P1/ P2, then a battery symbol appears in the display J .
5.1.14 The battery life depends on the measuring function used and is approx. 200 hours for
the BENNING CM P1 and approx. 30 hours for the BENNING CM P2 without using the
03/ 2018
symbol is shown on the display J ). The auto-
BENNING CM P1/ P2
" and "EF" symbols
symbol disappears from the

15