Operation Manual

06/ 2011 BENNING MM 7-1
17
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- 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 + 10 digits) 1000 V
DC
600 mV 100 µV ± (0.08 % of reading + 2 digits) 1000 V
DC
6 V 1 mV ± (0.08 % of reading + 2 digits) 1000 V
DC
60 V 10 mV ± (0.08 % of reading + 2 digits) 1000 V
DC
600 V 100 mV ± (0.08 % of reading + 2 digits) 1000 V
DC
1000 V 1 V ± (0.08 % of reading + 2 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 + 5 digits) 1000 V
eff
600 mV 100 µV ± (1.2 % of reading + 5 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 + 10 digits)
V
± (2 % of reading + 5 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
7.4 DC current ranges
Overload protection:
- 440 mA (1000 V) fuse, 11 kA, rapid on mA input
- 11 A (1000 V) fuse, 20 kA, rapid on 10 A input
Max. measuring time:
- 10 A range: 3 minutes (pause > 20 minutes)
- 600 mA range: 10 minutes (pause > 20 minutes)