Voltage Measurement; Current Measurement; Resistance Measurement; Diode Testing - Benning MM 3 Manuel De Instrucciones

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
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) 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" indi-
cates 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:
09/ 2013
Direct voltage measurement
Alternating voltage measurement
DC current measurement
AC current measurement
Resistance measurement
Diode Testing
BENNING MM 3
, ).
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