Diode Testing; Capacitance Measurement - Benning MM 3 Bedienungsanleitung

- 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:
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

CAUTION! Capacitors must be completely discharged before
attempting capacitance measurement! Never apply voltage

to the input terminals for a capacitance measurement as this
could destroy or damage the tester! A damaged tester may
present an electrical shock hazard to the user!
- Use the rotary switch  to select the appropriate range on the
BENNING MM 3.
- Establish the polarity of the capacitor and discharge the capacitor com-
pletely.
- Connect the fully discharged capacitor according to its polarity to the input
terminals for capacitance measurement  of the BENNING MM 3 and read
the measurement value on the digital display  of the BENNING MM 3.
see Figure 9:
8.7 Frequency measurement
- Use the rotary switch  to select the appropriate range on 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. Observe the voltage range of the BENNING MM 3 for
frequency measurements!
11/ 2008
DC current measurement
AC current measurement
Resistance measurement
Diode Testing
Continuity Testing with buzzer
Capacity Testing
BENNING MM 3
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