11/ 2014
BENNING CM 11
10
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 and decimal point. The highest value displayed is 5000.
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.
5.1.5 ZERO button
6
: For zero adjustment in current measure ment. Can also be used for all
ranges for differential measurement (zero setting possible for any value). Indicated by
“ZERO” in the digital display
9
.
5.1.6 The MIN/ MAX key function
7
automatically records and stores the highest and the
lowest measured value. By pressing the key, the following values are displayed: “MAX”
shows the highest value stored, “MIN” shows the lowest value stored and “MIN/ MAX”
shows the current measured value. Press the key for approx. 2 seconds to switch the
device back to normal operating mode.
In the „
/ Ω
“ measuring function, press the „MIN/ MAX“ key
7
to change from the
acoustic continuity test to resistance measurement.
5.1.7 HOLD key function: 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.
5.1.8 The yellow illumination key
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 11 amounts nominally to 2 measurements per
second for the digital display.
5.1.10 The BENNING CM 11 is switched on and off with the rotary switch
5
. Shutdown posi-
tion “OFF”.
5.1.11 The BENNING CM 11 switches off automatically after approx. 15 minutes (
APO
,
A
uto-
P
ower-
O
ff is activated, if the symbol is shown on the display
9
). It switches on
again, if the rotary switch
5
is switched on again from switch position „OFF“ or if the
yellow illumination key
is pressed. It switches on again, if the HOLD key
8
or another
key is actuated. Automatic switch-off can be deactivated by pressing the HOLD key and
by simultaneously switching on the BENNING CM 11 from the switching position “OFF”.
The symbol disappears from the display
9
.
5.1.12 The BENNING CM 11 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 11,
then a battery symbol appears in the display
9
.
5.1.14 The battery life depends on the measuring function used and is approximately 30 hours
to 100 hours without using the acoustic continuity test and background lighting (alkaline
battery).
5.1.15 Temperature coefficient of the measured value: 0.1 x (stated measuring accuracy)/ °C
< 18 °C or > 28 °C, related to the value for the reference temperature of 23 °C
5.1.16 Dimensions of unit (length x width x height) = 206 x 76 x 33,5 mm.
Weight of unit: 262 g (incl. batteries)
5.1.17 The safety measuring leads and measurement tips supplied are spe cially suited to the
rated voltage of the BENNING CM 11. The measuring tips can be protected by caps.
5.1.18 Widest prong opening: 23 mm
6. Ambient conditions
- The BENNING CM 11 is intended for making measurements in dry environment.
- Maximum barometric elevation for making measurements: 2000 m,
- Overvoltage category: IEC 60664/ IEC 61010 → 300 V category IV
- Contamination class: 2 (EN 61010-1),
- Protection class: IP 30 (DIN VDE 0470-1, IEC/ EN 60529)
IP 30 means: Protection against access to dangerous parts and protection against solid
impurities of a diameter > 2.5 mm, (3 - first index). No protection against water, (0 - second
index).
- Operating temperature and relative humidity:
For operating temperatures from 0 °C to 40 °C: relative air humidity lower than 80 %, non-
condensing
