Electrical Specifications; Frequency Ranges - Benning CM 4 Bedienungsanleitung

- 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 temperature 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 temperature from 41 °C to 50 °C: relative humidity less than 45 %
- Storage temperature: The BENNING CM 4 can be stored at any temperature
in the range from - 20 °C to + 60 °C (relative humidity from 0 to 80 %). The
battery should be taken out of 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 in the range from
18 °C to 28 °C and relative humidity less than 80 %.
7.1 Direct voltage ranges
The input resistance amounts to 1 MΩ
Measuring range Resolution
400 V
600 V
7.2 Alternating voltage ranges
The input resistance amounts to 1 MΩ in parallel 100 pF.
Measuring
Resolution
range
400 V
600 V
1
* The measured value is obtained by mean value rectification and displayed
as r.m.s. value. Its calibration is matched to a sinus-shaped curve type.
7.3 Alternating current ranges
Measuring
Resolution
range
60 A 0,1 A
400 A 0,1 A
600 A
400 A 0,1 A
600 A
1
* The measured value is obtained by mean value rectification and displayed
as r.m.s. value. Its calibration is matched to a sinus-shaped curve type.
The stated precision is specified for conductors that are centrally clamped
by the current probe  (see Fig. 4 alternating current measurement). For
conductors that are not centrally clamped, an additional error of 1 % of the
display value needs to be taken into account.
7.4 Resistance measuring range and acoustic continuity testing
Overload protection: 600 V
Meas. range Resolution
400 Ω
The built-in buzzer sounds in the case of a resistance R less than 30 Ω.

7.5 Frequency ranges

Overload protection: 600 A
Meas. range
400 Hz
Minimum input frequency: 20 Hz
09/ 2013
0.1 V ± (0.7 % of the measuring value + 2 digits)
1 V ± (0.7 % of the measuring value + 2 digits)
the frequency range 50 Hz - 500 Hz
0,1 V ± (1 % of the measuring value + 5 digits)
1 V ± (1 % of the measuring value + 5 digits)
the frequency range 50 Hz - 60 Hz
± (1.9 % of the measuring value + 7 digits)
± (1.9 % of the measuring value + 5 digits)
1 A ± (1.9 % of the measuring value + 5 digits)
± (2.5 % of the measuring value + 7 digits)
1 A ± (2.5 % of the measuring value + 7 digits)
eff
0,1 Ω ± (1 % of the measuring value + 3 digits)
eff
Resolution
1 Hz
BENNING CM 4
Meas. precision
1
Meas. precision *
1
Meas. precision *
within the frequency
range 61 Hz - 400 Hz
Meas. precision
± (0.1 % of the measuring value + 2 digits)
Overload protection
within
within
Max. idling voltage
Meas. precision

600 V
eff
600 V
eff
Overload
protection
600 V
eff
600 V
eff
Overload
protection
600 A
eff
600 A
eff
600 A
eff
600 A
eff
600 A
eff
3 V
11