Benning MM 3 - Frequency ranges; Measuring with BENNING MM 3; Measurement preparation; Voltage and current measurement

10/ 2004 BENNING MM 3 14

Range Resolution Accuracy Frequency
2 nF 1 pF ± (2,0 % of reading + 4 digits) 40 Hz
20 nF 10 pF ± (2,0 % of reading + 4 digits) 40 Hz
200 nF 100 pF ± (2,0 % of reading + 4 digits) 40 Hz
2 µF 1 nF ± (2,0 % of reading + 4 digits) 40 Hz
20 µF 10 nF ± (2,0 % of reading + 4 digits) 40 Hz
200 µF 100 nF ± (2,0 % 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 ± (1,0 % of reading + 3 digits) 20 Hz 600 V
rms
20 kHz 10 Hz ± (1,0 % of reading + 3 digits) 200 Hz 600 V
rms
200 kHz 100 Hz ± (1,0 % of reading + 3 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.
8.2 Voltage and current measurement

To avoid electrical shock, observe the maximum rated voltage
to earth ground!
The maximum rated voltage that should be applied between any of the following
terminals of the BENNING MM 3 and earth ground is 600 V.
- COM terminal

- Input terminal for V, Ω, and Hz

- Input terminal for µA/ mA range

- Input terminal for 20 A range


Electrical hazard! Maximum permissible circuit voltage for
current measurement is 500 V! If a safety fuse blows at a
voltage above 500 V the BENNING MM 3 could be damaged.
A damaged tester presents an electrical shock hazard to the
user!
8.2.1 Voltage measurement
- Select the appropriate range with the rotary switch  of the
BENNING MM 3.
- Use the selector switch
 of the BENNING MM 3 to select the required