Operation Manual

09/ 2013 BENNING CM 4
10

 Opening lever, for opening and closing the current probe.
 Bulge of current probe, protects against contact with conductor.
 Measuring pliers, for clamping on the single wire current-carrying
conductor.
1
) This is what the automatic polarity indication for DC voltage refers to
5. General information
5.1 General details on the current probe multimeter
5.1.1 The digital display  is a 3¾- digit liquid crystal display with 14 mm
high numerals, complete with decimal point. The largest numerical
value which can be displayed is 4000.
5.1.2 The polarity indication  is automatic. Only one polarity with respect to
the socket marked “-” is indicated.
5.1.3 The overranging is indicated by “0L” or “- 0L” and, in part, an acoustic
warning.
Warning, no indication and prior warning in the event of an overload
condition!
5.1.4 Button (yellow)  switches on the display illumination. Shutdown is
effected by a renewed press of the button or automatically after 60
seconds.
5.1.5 Measured value storage “HOLD”: Press the button “HOLD”  to store
the measured result. At the same time, the display shows the symbol
“HOLD”. A renewed press of the button switches back into measuring
mode.
5.1.6 The MIN/ MAX button function  inputs and stores automatically the
highest and lowest measured value. The following values are indicated
by button operation:
“MAX” indicates the stored maximum value, and “MIN” indicates the
lowest value. The continuous detection of the MAX-/ MIN value can
be stopped or started by pressing the button “HOLD” . Pressing the
button “MIN/MAX” for an extended period of time (2 seconds) switches
back into normal mode.
5.1.7 The button PEAK  (peak value storage) detects and stores the
positive and negative peak / crest value in the function V AC and A AC.
At the start of the measurement, press the button PEAK  for approx.
3 seconds in order to increase measurement precision and to fine-
adjust the BENNING CM 4. Pressing the button indicates the “PMAX”
or “PMIN” values in the display. An extended operation (2 seconds) of
the button PEAK  switches back into a standard mode.
5.1.8 The measuring rate of the BENNING CM 4 amounts nominally to 1.5
measurements per second for the digital display.
5.1.9 The BENNING CM 4 is switched on and off with the rotary switch .
Shutdown position “OFF”.
5.1.10 The BENNING CM 4 switches off automatically after approx. 30 minutes
(APO, Auto-Power-Off). It switches back on again if a button or the
rotary switch is operated. A buzzer tone signals automatic switchoff of
the appliance. The automatic switchoff can be deactivated by pressing a
button (except the button “HOLD”) and simultaneously switching on the
BENNING CM 4 from switch position “OFF”.
5.1.11 Temperature coefficient of the measured value: 0.2 x (stated measuring
precision)/ °C < 18 °C or > 28 °C, related to the value for the reference
temperature of 23 °C.
5.1.12 The BENNING CM 4 is supplied by two 1.5 V mignon batteries (IEC LR
06).
5.1.13 If the battery voltage drops below the specified operating voltage of the
BENNING CM 4, then a battery symbol appears in the display.
5.1.14 The life span of a battery amounts to approx. 600 hours (alkali
battery).
5.1.15 Appliance dimensions:
(L x W x H) = 220 x 83 x 45 mm
Appliance weight: 324 g
5.1.16 The safety measuring cables supplied are expressly suited for the rated
voltage and the rated current of the BENNING CM 4.
5.1.18 Largest opening of pliers: 37 mm
5.1.17 Largest cable diameter: 34 mm
6. Environment conditions:
- The BENNING CM 4 is intended for making measurements in dry
environment.
- Maximum barometric elevation for making measurements: 2000 m,
- Overvoltage category/ Siting category: IEC 60664-1/ IEC 61010-1 → 600 V
category III,
- Contamination class: 2,