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05/ 2020
BENNING MM 3
14
7.5 Resistance ranges
Overload protection for resistance measurements: 600 V
rms
.
Range
Resolution
Accuracy
Maximum
test current
Max. open
circuit voltage
200 Ω
0,1 Ω
± (0.8 % of reading + 4 digits)
2,5 mA
3,2 V
2 kΩ
1 Ω
± (0.8 % of reading + 2 digits)
200 µA
0,5 V
20 kΩ
10 Ω
± (0.8 % of reading + 2 digits)
40 µA
0,5 V
200 kΩ
100 Ω
± (0.8 % of reading + 2 digits)
4 µA
0,5 V
2 MΩ
1 kΩ
± (0.8 % of reading + 2 digits)
400 nA
0,5 V
20 MΩ
10 kΩ
± (2 % of reading + 5 digits)
40 nA
0,5 V
7.6 Diode and Continuity Testing
The accuracy indicated below is valid in the range of 0.4 V to 0.9 V.
Overload protection for diode testing: 600 V
rms
.
The built-in buzzer sounds if the resistance R falls below 50 Ω.
Range
Resolution
Accuracy
Maximum
test current
Max. open
circuit voltage
1 mV
± (1.5 % of reading + 5 digits)
1,5 mA
3,2 V
7.7 Capacitance ranges
Conditions: Capacitors must be discharged before testing and then connected
to the meter according to the indicated polarity.
Range
Resolution
Accuracy
Frequency
2 nF
1 pF
± (3.0 % of reading + 4 digits)
40 Hz
20 nF
10 pF
± (3.0 % of reading + 4 digits)
40 Hz
200 nF
100 pF
± (3.0 % of reading + 4 digits)
40 Hz
2 µF
1 nF
± (3.0 % of reading + 4 digits)
40 Hz
20 µF
10 nF
± (3.0 % of reading + 4 digits)
40 Hz
200 µF
100 nF
± (3.0 % of reading + 4 digits)
40 Hz
7.8 Frequency ranges
The frequency to be measured must have a minimum input signal of 200 mV
rms
.
Range
Resolution
Accuracy for 5 V
rms
max.
Minimum input
frequency
Overload
protection
2 kHz
1 Hz
± (1.5 % of reading + 5 digits)
20 Hz
600 V
rms
20 kHz
10 Hz
± (1.5 % of reading + 5 digits)
200 Hz
600 V
rms
200 kHz
100 Hz
± (1.5 % of reading + 5 digits)
2 kHz
600 V
rms
8. Measuring with BENNING MM 3
8.1 Measurement preparation
The BENNING MM 3 must be used and stored only at the indicated storage and
working temperatures, avoid exposure to continuous sunlight.
- Check the rated voltage and current indications on the test leads. The
safety test leads provided with the BENNING MM 3 correspond specifically
to the rated voltage and current of the BENNING MM 3.
- Inspect the test leads for damaged insulation. If the insulation is damaged,
the test leads should be discarded immediately.
- Check test lead continuity. If the conductor in the test lead is damaged, the
leads should be discarded immediately.
- Remove test leads from circuit to be measured before turning the rotary
switch
to select another function.
- If the BENNING MM 3 is used near strong noise generating sources, the
display may become unstable and measurement errors may arise.
