Capacitance Measurement - Benning MM 3 Manuel De Instrucciones

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 completely.
- 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!
- 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 10:
9. Maintenance

Remove test leads and turn the power off before opening the
BENNING MM 3! Dangerous voltage!
Any work to be carried out on an opened BENNING MM 3 under voltage is
strictly reserved for qualified electrotechnical personnel who must take
special precautionary measures to avoid accidents.
This is how to ensure that the BENNING MM 3 is free from any voltage before
the instrument is opened:
- first remove the safety test leads from measured object.
- then remove both safety test leads from the BENNING MM 3.
- turn the rotary switch  to the "OFF" position.
9.1 Instrument safe-guarding
In certain circumstances, safety during the use of the BENNING MM 3 can no
longer be guaranteed; when for instance:
- there is visible damage to the housing
- measurement errors occur
- the instrument has been subjected to prolonged storage under unfavorable
conditions and
- the instrument has been subjected to severe transport stresses.
In such cases the BENNING MM 3 must be immediately switched off, removed
from the measurement points and secured against any future unintentional
operation.
9.2 Cleaning
Wipe the case of the BENNING MM 3 with a clean dry cloth (exception: spe-
cial cleaning cloths). Do not use any solvents and/or abrasives to clean the
BENNING MM 3.
09/ 2013
Continuity Testing with buzzer
Capacity Testing
Frequency measurement
BENNING MM 3
,
).
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