PEWA BENNING MM 3 Notice D'emploi page 17

direct (DC) or alternating (AC) voltage to be measured.
- Connect the black safety test lead to the COM-terminal  of the
BENNING MM 3.
- Connect the red safety test lead to the input terminal for V, Ω, and Hz  of
the BENNING MM 3.
- Connect the safety test leads to the circuit measurement points and read
the measured value on the digital display  of the BENNING MM 3.
see Figure 2:
see Figure 3:
8.2.2 Current 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
direct (DC) or alternating (AC) voltage / current to be measured.
- Connect the black safety test lead to the COM-terminal  of the
BENNING MM 3.
- Connect the red safety test lead to the input terminal for the µA/ mA range
 for currents up to 200 mA, or to the input terminal for the 20 A range 
for currents between 200 mA and 20 A of the BENNING MM 3.
- Connect the safety test leads to the circuit measurement points and read
the measured value on the digital display  of the BENNING MM 3.
see Figure 4:
see Figure 5:
8.3 Resistance Measurement
- Select the appropriate range with the rotary switch  of the
BENNING MM 3.
- Connect the black safety test lead to the COM-terminal  of the
BENNING MM 3.
- Connect the red safety test lead to the input terminal for V, Ω, and Hz  of
the BENNING MM 3.
- Connect the safety test leads to the circuit measurement points and read
the measured value on the digital display  of the BENNING MM 3.
see Figure 6:
8.4 Diode Testing
- Turn the rotary switch  of the BENNING MM 3 to select the appropriate
range identified by a buzzer and diode symbol.
- Connect the black safety test lead to the COM-terminal  of the
BENNING MM 3.
- Connect the red safety test lead to the input terminal for V, Ω, and Hz  of
the BENNING MM 3.
- Connect the safety test leads across the diodes and read the measured
value on the digital display  of the BENNING MM 3.
- For a typical silicone diode tested in the forward-biased direction a voltage
flow between 0,500 V and 0,900 V is displayed. A display showing "000"
indicates a short circuit in the diode, whereas a display showing "1"
indicates an open circuit in the diode.
- For a diode tested in the reverse-biased direction the display reads "1". If
the diode is damaged, the display will show "000" or other values.
see Figure 7:
8.5 Continuity Testing with Buzzer
- Turn the rotary switch  of the BENNING MM 3 to select the appropriate
range identified by a buzzer and diode symbol.
- Connect the black safety test lead to the COM-terminal  of the
BENNING MM 3.
- Connect the red safety test lead to the input terminal for V, Ω, and Hz  of
the BENNING MM 3.
- Connect the safety test leads to the circuit to be measured. If the circuit
resistance between the COM-terminal  and the input terminal for V, Ω and
Hz  falls below 50 Ω, then the built-in buzzer in the BENNING MM 3 emits
a continuous tone.
see Figure 8:
8.6 Capacitance Measurement
10/ 2004
Direct voltage measurement
Alternating voltage measurement
DC current measurement
AC current measurement
Resistance measurement
Diode Testing
Continuity Testing with buzzer
BENNING MM 3

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