Benning CM 12 Bedienungsanleitung Seite 34

7.2 Current ranges
Function Measuring
0.10 A - 99.99 A
A AC
599.9 A
A AC 0.10 A - 99.99 A
(HFR) 599.9 A
99.99 A
A DC
599.9 A
Measuring range below 1,000 digits: plus 5 digits
[1]
Positioning error: ± 1 % of the displayed value
A DC: The influence of the temperature and of the residual magnetism can be
compensated by pressing the HOLD/ZERO key 9 (2 seconds). "ZERO"
symbol is displayed.
Additional specifications:
The measured value is obtained and displayed as a true effective value (TRUE
RMS). Selectable coupling type: AC or AC+DC. For AC+DC coupling, the accu-
racy specifications for A AC + A DC have to be added. In the case of non-sinus-
shaped curves (50 Hz/ 60 Hz) the display value becomes less precise. Thus an
additional error results for the following crest factors:
Crest factor from 1.4 to 2.0 additional errors + 1.0 %
Crest factor from 2.0 to 2.5 additional errors + 2.5 %
Crest factor from 2.5 to 3.0 additional errors + 4.0 %
Crest-Faktor 3 @ 460 V, 280 A
Crest-Faktor 2 @ 690 V, 420 A
7.2.1 PEAK-HOLD function (memory of peak value)
Function Measuring
A AC
Measuring accuracy specified for sinusoidal curves > 5 A
Rectangular shapes of the curve are unspecified.
7.2.2 INRUSH function (inrush current measurement)
Function Measuring
A AC
Measuring accuracy specified for sinusoidal curves (50 Hz - 60 Hz).
Average time:
Trigger current: > 1 A
7.3 Resistance measuring ranges, continuity and diode testing
Overload protection: 1000 V
Function
Resistance
Continuity
Diode 0.40 V - 0.80 V
Max. no-load voltage for resistance and continuity: approx. 3.0 V
Max. no-load voltage for diode: approx. 1.8 V
08/ 2018
Resolution
range
10 mA
0.1 A
10 mA
0.1 A
10 mA
0.1 A
Resolution
range
140.0 A 0.1 A
850 A 1 A
Resolution
range
99.99 A 0.01 A
599.9 A 0.1 A
100 ms
in the 100 A measuring range, > 10 A
eff
measuring range
AC/DC
Measuring Resolution
range
999.9 Ω
9.999 kΩ
99.99 kΩ
999.9 Ω
BENNING CM 12
Measurement accuracy
± 1.9 % + 5 digits (50 Hz - 60 Hz)
± 2.4 % + 5 digits (> 60 Hz - 400 Hz)
± 1.9 % + 5 digits (50 Hz - 60 Hz)
± 5.4 % + 5 digits (> 60 Hz - 400 Hz)
± 1.9 % + 0.2 A
± 1.9 % + 5 digits
± 3 % + 15 digits (50 Hz - 400 Hz)
0.1 Ω
1 Ω
10 Ω
0.1 Ω
0.01 V
[1]
Measurement accuracy
with repetitive events.
eff
Measurement accuracy
± 2.5 % + 0.2 A
± 2.5 % + 5 digits
Measurement accuracy
± 1 % + 5 digits
± 1 % + 5 digits
± 0.1 V

Overload
protection
[1]
[1]
[1]
600 A
[1]
eff
in the 600 A
eff
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