Device description
4.3 Measuring ranges
5235 / 05/2022 en
BENNING MM 7-2
27
AC voltage ranges (HFR V‑AC)
Overload protection: 1 100 V‑AC / V‑DC
Measuring range
Resolution
Measuring accuracy
600 V
0.01 V
10 … 200 Hz: ±(4.0 % + 50 digits)
200 … 440 Hz: ±(10.0 % + 50 digits)
1)
1 000 V
0.1 V
Table 8:
AC voltage ranges (HFR V‑AC)
1)
Measuring accuracy linearly decreasing from ±(2.0 % + 50 digits) at 200 Hz to
±(10.0 % + 50 digits) at 440 Hz, frequencies >440 Hz are not specified
• Limiting frequency f
g
(-3 dB): approx. 1 000 Hz
DC voltage ranges (V‑DC)
Overload protection: 1 100 V‑AC / V‑DC
Measuring range
Resolution
Measuring accuracy
600 mV
0.01 mV
±(0.03 % + 2 digits)
6 V
0.1 mV
60 V
0.001 V
600 V
0.01 V
±(0.05 % + 5 digits)
1 000 V
0.1 V
±(0.15 % + 5 digits)
Table 9:
DC voltage ranges (V‑DC)
• Input resistance: 10 MΩ II, 75 pF (280 pF in the 600 mV range)
Voltage ranges (LoZ, AutoV)
Overload protection: 1 100 V‑AC / V‑DC
Measuring range
Resolution
Measuring accuracy
6 V
0.1 mV
DC (0 Hz): ±(0.5 % + 30 digits)
AC (50 … 60 Hz): ±(1.0 % + 40 digits)
1)
60 V
0.001 V
600 V
0.01 V
1 000 V
0.1 V
Table 10:
Voltage ranges (LoZ, AutoV)
1)
Measuring accuracy applies to 10 ... 100 % of the final measuring range value:
• Minimum sensitivity: >1 V‑AC (50 / 60 Hz), >1.0 V‑DC, <-1.0 V‑DC)
• Input resistance: Initially 2.1 kΩ II, 140 pF, rapidly increasing for display values >50 V.
Typical input resistances depending on the display values: 12 kΩ at 100 V, 90 kΩ at 300 V,
300 kΩ at 600 V, 670 kΩ at 1 000 V
