10/ 2019
BENNING CM 9-1
12
044145) are approved in accordance with CAT III 1000 V/ CAT IV 600 V and
for a current up 10 A.
4. Device description
See figure 1:
Appliance front face
The display and operating elements shown in figure 1 are designated as follows:
1
Measuring clamp
, for clamping live conductors,
2
Prong guard
, protects user from accidental contact with conductor
3
key (yellow)
, display illumination
4
Opening lever
, for opening and closing the current prongs
5
Rotary switch
, for selecting the measurement function
6
ZERO/LPF key
, for zero balance or differential measuring, enabling the low-
pass filter (LPF)
7
PEAK key
, peak value storage
8
HOLD/RANGE button
, storage of the indicated measured value, switch-
over to manual measuring range selection (V and A).
9
Digital display
, for displaying the measured value and range exceedance
J
COM jack
, common jack for voltage and resistance measurements as well
as for continuity testing, marked in black
K
V-Ω jack
(positive), common jack for voltage and resistance measurements
as well as for continuity testing, marked in red
L
Battery compartment cover
, at the rear of the housing
5.
General information
5.1
General information on digital current clamp multimeter
5.1.1 The digital display
9
is designed as a 4 digit liquid-crystal indicator with
12 mm digit height with decimal point. The highest value displayed is
6000.
5.1.2 The polarity indication on the digital display
9
works automatically.
Contrary to the measurement-wire definition, only one pole is indicated
as “-”.
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 rotary switch
5
is intended for selecting the measuring function.
The selection of the measuring range is automatic.
5.1.5 The ZERO/LPF key
6
has two functions:
- ZERO function:
For zero adjustment in current measurement. Can also be used for
all ranges for differential measurement (zero setting possible for
any value). Indicated by “ZERO” in the digital display
9
.
- LPF function (low-pass filter):
Press the ZERO button
6
for 2 seconds to enable a low-pass filter
(40 Hz to 70 Hz) in the A and mA ranges. An active filter is visual-
ized by the “LPF” symbol on the LC display
9
. The low-pass filter
(LPF) suppresses high-frequency interfering signals generated by
electrical devices/installations with frequency converters. The limit-
ing frequency is approx. 180 Hz.
Note:
When the low-pass filter (LPF) is disabled, the frequency characteristics
of the BENNING CM 9-1 meet the requirements of EN 61557-16 (VDE
0413-16) and can be used to measure protective conductor currents
and differential currents of electrical devices.
5.1.6 The PEAK key
7
has two functions:
- Press this key in the measuring modes V and A to measure and
store the peak value. Briefly press the key again to return to the
normal mode.
-
In the
measuring mode, press the PEAK key
7
to change
from resistance measurement to the acoustic continuity test.
5.1.7 The HOLD/RANGE key
8
has two functions:
- The measuring result can be stored by pressing the HOLD key
8
. The “HOLD” symbol simultaneously appears on the display
9
.
Press the key again to switch the device back to measuring mode.
- Press and hold the key for 2 seconds to leave the automatic mea-
suring range selection and to manually switch to the next higher
measuring range (V and A). As soon as another measuring function
is selected via the rotary switch
5
, the automatic measuring range
selection is active again.
5.1.8 The yellow illumination key
3
activates the illumination of the display
9
. It is switched off by pressing the key again or automatically after
approx. 30 seconds.
5.1.9 The measuring rate of the BENNING CM 9-1 amounts nominally to 2
measurements per second for the digital display.
