Operation Manual

BENNING CM 5-1 02/ 2011
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pressed for more than 5 seconds, the „AutoHOLD“ symbol O flashes
on the display and „AutoHOLD“ is activated. If the multimeter detects
a constant measured value, the buzzer can be heard three times and
the measured value will be shown on the display together with the
„AutoHOLD“ symbol for approx. 5 seconds. The measured value can
be stored by actuating the key (grey) J. With the „AutoHOLD“ function
being activated, the APO function is deactivated.
5.1.8 The measuring rate of the BENNING CM 5-1 amounts nominally to 5
measurements per second for the digital display.
5.1.9 The BENNING CM 5-1 is provided with a self-test function. Do not
use the BENNING CM 5-1, if „FAIL“ is shown on the display. In case
of an error, switch the device off an on again. If the error persists,
send the BENNING CM 5-1 to our service address (see section 9.4
„Calibration“).
5.1.10 The BENNING CM 5-1 is switched off automatically after approx. 20
minutes (APO, Auto-Power-Off). It switches on again when the key
(grey) J is actuated. A buzzer sound indicates the automatic switch-off
of the device. The automatic switch-off can be deactivated by press-
ing the key J for approx. 3 seconds during switch-on. The automatic
switch-off is indicated by a flashing „APO“ symbol 6 on the digital
display. When switching the device on again, briefly press the key J to
reactivate the automatic switch-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 5-1 is supplied by a fitted 9 V block battery (IEC 6
LR 61).
5.1.13 If the battery voltage drops below the specified operating voltage of the
BENNING CM 5-1, then a battery symbol 9 appears on the display.
5.1.14 The life span of a battery amounts to approx. 125 hours (alkali battery).
5.1.15 Appliance dimensions:
(L x W x H) = 215 x 85 x 51 mm
Appliance weight: 360 g
5.1.16 The safety measuring leads supplied are expressly suited for the rated
voltage and the rated current of the BENNING CM 5-1.
5.1.17 Largest opening of pliers: 35 mm
5.1.18 Largest cable diameter: 30 mm
6. Ambient conditions:
- The BENNING CM 5-1 is intended for making measurements in dry envi-
ronment.
- Maximum barometric elevation for making measurements: 2000 m,
- Overvoltage category/ setting category: IEC 60664-1/ IEC 61010-1 →
600 V category IV, 1000 V category III
- Contamination class: 2,
- 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 protec-
tion against water, (0 - second index).
- Operating temperature and relative humidity:
For operating temperatures from 0 °C to 30 °C: relative humidity less than
80 %
For operating temperatures from 31 °C to 40 °C: relative humidity less than
75 %
For operating temperatures from 41 °C to 50 °C: relative humidity less than
45 %
- Storage temperature: The BENNING CM 5-1 can be stored at any tempera-
ture within the range of - 20 °C to + 60 °C (relative humidity from 0 to 80 %).
The battery should be removed from the instrument for storage.
7. Electrical specifications
Note: The measuring precision is specified as the sum of
- a relative fraction of the measured value and
- a number of digits (counting steps of the least significant digit).
This specified measuring precision is valid for temperatures within the range of
18 °C to 28 °C and for a relative humidity lower than 80 %.
7.1 Priority of the AUTOTEST function
The AUTOTEST function automatically switches to the correct measuring
function and automatically selects the ideal measuring range: For this, the
BENNING CM 5-1 works according to the following order: