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02/ 2020
BENNING MM 7-1
18
cate gory IV; 1000 V category III.
- Degree of contamination: 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:
At operating temperatures of 0 °C to 30 °C: relative humidity under 80 %.
At operating temperatures of 30 °C to 40 °C: relative humidity under 75 %.
- At operating temperatures of 40 °C to 50 °C: relative humidity under 45 %.
- Storage temperature: The BENNING MM 7-1 can be stored at tempera-
tures from - 20 °C to + 60 °C (humidity 0 up to 80 %). The batteries must
be removed from the unit.
7. Electrical data
Note: The measurement accuracy is stated as the sum of
- a relative proportion of the measurement value and
- a number of digits (i.e. numerical steps of the last place).
This measurement accuracy applies for a temperature of 18 °C to 28 °C and a
maximum relative humidity of max. 80 %.
7.1 DC voltage ranges
The input resistance is 10 MΩ
Measuring range Resolution
Measurement accuracy
Overload protection
60 mV
10 µV
± (0.08 % of reading + 15 digits)
1000 V
DC
600 mV
100 µV
± (0.08 % of reading + 5 digits)
1000 V
DC
6 V
1 mV
± (0.08 % of reading + 5 digits)
1000 V
DC
60 V
10 mV
± (0.08 % of reading + 5 digits)
1000 V
DC
600 V
100 mV
± (0.08 % of reading + 5 digits)
1000 V
DC
1000 V
1 V
± (0.08 % of reading + 5 digits)
1000 V
DC
7.2 AC/ AC+DC voltage ranges
The input resistance is 10 MΩ parallel < 100 pF. The measurement value is
obtained as a true RMS value and displayed as such. With non-sinusoidal
curves, the value displayed is less accurate. This results in an additional error
for the following crest factors:
Crest factor of 1.4 to 2.0, additional error + 1.0 %.
Crest factor of 2.0 to 2.5, additional error + 2.5 %.
Crest factor of 2.5 to 3.0, additional error + 4.0 %.
AC Measuring
range
Resolution
Measurement accuracy
in frequency range 50 Hz - 1 kHz
Overload
protection
60 mV
10 µV
± (1.2 % of reading + 10 digits)
1000 V
eff
600 mV
100 µV
± (1.2 % of reading + 10 digits)
1000 V
eff
6 V
1 mV
± (0.8 % of reading + 5 digits)
1000 V
eff
60 V
10 mV
± (0.8 % of reading + 5 digits)
1000 V
eff
600 V
100 mV
± (0.8 % of reading + 5 digits)
1000 V
eff
1000 V
1 V
± (0.8 % of reading + 5 digits)
1000 V
eff
AC+DC Measuring range
Measurement accuracy in frequency range 50 Hz - 1 kHz
mV
± (2 % of reading + 15 digits)
V
± (2 % of reading + 10 digits)
7.3 AutoV, “LoZ” range
The low-impedance input resistance of approx. 3 kΩ serves to suppress induc
-
tive and capacitive voltages.
Measuring range Resolution
Measurement accuracy
Overload protection
600 V
DC
100 mV
± (0.8 % of reading + 5 digits)
1000 V
AC/ DC
1000 V
DC
1 V
± (0.8 % of reading + 5 digits)
1000 V
AC/ DC
in frequency range 50 Hz - 500 Hz
600 V
AC
100 mV
± (0.8 % of reading + 5 digits)
1000 V
AC/ DC
1000 V
AC
1 V
± (0.8 % of reading + 5 digits)
1000 V
AC/ DC
