BENNING CM 5-1
02/ 2011
13
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
,
A
uto-
P
ower-
O
ff). 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:
