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BENNING MM P3
19
8.2 Voltage measurement
Do not exceed the maximum permitted voltage with respect to earth
potential! Electrical danger!
The highest voltage which may be applied to the
- COM safety measuring lead (black)
J
- safety measuring lead (red) for V, Ω, , Hz
9
of the BENNING MM P3 against ground is 600 V.
- Select the desired function (V AC) or (V DC) by means of the rotary switch
7
of
the BENNING MM P3.
- Bring the safety measuring leads into contact with the measuring
points and read the measured value on the digital display
of the
BENNING MM P3.
- Use the „SELECT“ key
5
in switch setting (V
AC
) to switch over to frequency
measurement (press the key once) or to pulse-duty factor measurement (press
the key twice).
Note:
In lower voltage ranges, the „zero volt“ indication might fail to appear due to interfer-
ence, if the safety measuring leads are open. Check the BENNING MM P3 for correct
functioning by short-circuiting the measuring probes.
See gure 2: DC voltage measurement
See gure 3: AC voltage measurement
8.3 Resistance measurement
- Select the desired function (Ω, , ) by means of the rotary switch
7
of the
BENNING MM P3
- Bring the safety measuring leads into contact with the measuring
points and read the measured value on the digital display
of the
BENNING MM P3.
See gure 4: Resistance measurement
8.4 Diode test
- Select the desired function (Ω, , ) by means of the rotary switch
7
of the
BENNING MM P3.
- Switch over to the diode test ( ) by means of the „SELECT“ key
5
of the
BENNING MM P3 (press the key once).
- Bring the safety measuring leads into contact with the diode connections and
read the measured value on the digital display
of the BENNING MM P3.
- For a standard Si diode applied in conduction direction, a conduction voltage
between 0.400 V and 0.900 V is displayed. „000“ indicates a short-circuit inside
the diode, „OL“ indicates an interruption inside the diode.
- For a diode applied in reverse direction, „OL“ is indicated. If the diode is defective,
„000“ or other values are indicated.
See gure 5: Diode test
27


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