User Manual

02/ 2018 BENNING CM 2
14
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Measuring range Resolution Measurement accuracy Overload protection
400,0 mV 100 µV
± (2,0 % of reading + 5 digits)*
in frequency range 50 Hz - 60 Hz
600 V
eff
600 V DC voltage
4,000 V 1 mV
± (1,5 % of reading + 5 digits)
in frequency range 40 Hz - 300 Hz
600 V
eff
600 V DC voltage
40,00 V 10 mV
± (1,5 % of reading + 5 digits)
in frequency range 40 Hz - 500 Hz
600 V
eff
600 V DC voltage
400,0 V 100 mV
± (1,5 % of reading + 5 digits)
in frequency range 40 Hz - 500 Hz
600 V
eff
600 V DC voltage
600 V 1 V
± (1,5 % of reading + 5 digits)
in frequency range 40 Hz - 500 Hz
600 V
eff
600 V DC voltage
* When input is opened, fluctuating up to 30 digits; measuring range ≥ 1 mV
7.3 Resistance range
No-load voltage approx. 0.3 V, max. test current 0.2 mA
Measuring range Resolution Measurement accuracy Overload protection
400 Ω 100 mΩ ± (1,2 % of reading + 6 digits)
*1
600 V
eff
600 V DC voltage
4,000 kΩ 1 Ω ± (0,9 % of reading + 3 digit)
*2
600 V
eff
600 V DC voltage
40,00 kΩ 10 Ω ± (0,9 % of reading + 3 digit)
*2
600 V
eff
600 V DC voltage
400,0 kΩ 100 Ω ± (1,2 % of reading + 3 digit)
*2
600 V
eff
600 V DC voltage
4,000 MΩ 1 kΩ ± (1,2 % of reading + 3 digit)*
2
600 V
eff
600 V DC voltage
40,00 MΩ 10 kΩ ± (2,5 % of reading + 5 digit)
*1 *3
600 V
eff
600 V DC voltage
*1
in end area of display only, + 6 digits
*2
in end area of display only, + 3 digits
*3
maximum start-up time until display appears, 20 sec.
7.4 Continuity test
No-load voltage approx. 3 V, max. test current 0.1 mA
The built-in buzzer sounds when resistance is less than 50 Ω - 300 Ω.
7.5 DC current ranges
Measurement accuracy at a temperature of 23 °C ± 3 °C
Measuring range Resolution Measurement accuracy Overload protection
40.0 A 10 mA ± (2.5 % of reading + 2 digit) 400 A
40.0 - 200.0 A 100 mA ± (2.5 % of reading + 2 digit) 400 A
200.0 - 300.0 A 100 mA ± (3.0 % of reading + 2 digit) 400 A
7.6 AC current ranges
Measurement accuracy at a temperature of 23 °C ± 3 °C. The measuring value
is gained and indicated as effective value (True RMS, AC coupling). Its calibra-
tion is adapted for a sinusoidal curve form. With deviations from this form, the
display value becomes less accurate. The additional error for the following crest
factors is as follows:
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%
Measuring range Resolution Measurement accuracy Overload protection
0 - 4.0 A 10 mA
± (2.0 % of reading + 5 digit)*
for frequencies 50 - 60 Hz
± (3.0 % of reading + 7 digit)*
for frequencies 40 - 1 kHz
400 A
4.00 - 40.00 A 10 mA
± (2.5 % of reading + 3 digit)*
for frequencies 50 Hz - 60 Hz
± (3.5 % of reading + 5 digit)*
for frequencies 40 Hz - 1 kHz
400 A