Current Measurement; Capacity Measurement; Frequency Measurement - Benning MM 12 Bedienungsanleitung

8.2.2

Current measurement

- Use the rotating switch J to select the required range and function (A AC, A DC, A AC/ DC)
on the BENNING MM 12.
- Press the Function key 5 (down/ ▼) of the BENNING MM 12 to select the current type to
be measured: alternating current (AC), direct current (DC) or (AC+DC).
- Connect the black safety measuring lead to the COM socket L on the BENNING MM 12.
- Connect the red safety measuring lead to the socket for the mA range M for currents up
to 400 mA or to the socket for 10 A range N for currents greater 400 mA to 10 A on the
BENNING MM 12.
- Connect the safety measuring leads to the measuring points. Read the measurement value
displayed in the digital display 1 of the BENNING MM 12.
See figure 4:
See figure 5:
8.3 Resistance measurement
- Use the rotating switch J to select the required function (Ω,
BENNING MM 12.
- Connect the black safety measuring lead to the COM socket L on the BENNING MM 12.
- Connect the red safety measuring lead to the socket K on the BENNING MM 12.
- Connect the safety measuring leads to the measuring points. Read the measurement value
displayed in the digital display 1 of the BENNING MM 12.
See figure 6:
8.4 Diode testing
- Use the rotating switch J to select the required function
BENNING MM 12.
- Press the Function key 5 (down/ ▼) of the BENNING MM 12 to switch over (press twice)
to the diode test (
- Connect the black safety measuring lead to the COM socket L on the BENNING MM 12.
- Connect the red safety measuring lead to the socket K on the BENNING MM 12.
- Contact the diode connections with the safety measuring leads. Read the measurement
value displayed in the digital display 1 of the BENNING MM 12.
- For a normal silicone diode located in flow direction, the flow voltage between 0.4 V and
0.8 V is displayed. "OL" indicates a short-circuit or an interruption inside the diode.
- For a diode applied in reverse direction, a negative forward voltage between -0.400 V and
-0.900 V is indicated.
See figure 7:
8.5 Continuity testing with buzzer
- Use the rotating switch J to select the required function (Ω,
BENNING MM 12.
- Press the Function key 5 (down/ ▼) of the BENNING MM 12 to switch over (press once)
to the continuity test ( ).
- Connect the black safety measuring lead to the COM socket L on the BENNING MM 12.
- Connect the red safety measuring lead to the socket K on the BENNING MM 12.
Connect the safety measuring leads to the measuring points. If the line resistance between
the COM jack L and the jack K falls below the adjustable limiting value (10 Ω to 50 Ω), the
integrated buzzer of the BENNING MM 12 sounds.
See figure 8:

8.6 Capacity measurement

Discharge capacitors fully before measurement! Never apply voltage to the

sockets for capacitance measurement as this may cause irreparable damage
to the unit. A damaged unit may represent an electrical hazard!
- Use the rotating switch J to select the required function (Ω,
BENNING MM 12.
- Press the Function key 5 (down/ ▼) of the BENNING MM 12 to switch over (press three
times) to the capacity measurement function (
- Determine the polarity of the capacitor and discharge capacitor completely.
- Connect the black safety measuring lead to the COM socket L on the BENNING MM 12.
- Connect the red safety measuring lead to the socket K on the BENNING MM 12.
- Contact the discharged capacitor with the safety measuring leads observing correct polarity.
Read the measurement value on the digital display 1 of the BENNING MM 12.
See figure 9:

8.7 Frequency measurement

- Use the rotating switch J to select the required function (V AC, mV AC, A AC) on the
BENNING MM 12.
- Press the Function key 5 (down/ ▼) of the BENNING MM 12 to switch over to the fre-
quency measurement function (Hz).
- Connect the black safety measuring lead to the COM socket L on the BENNING MM 12.
- Connect the red safety measuring lead to the socket K on the BENNING MM 12. Remember
the minimum sensitivity for frequency measurements using the BENNING MM 12!
- Connect the safety measuring leads to the measuring points. Read the measurement value
displayed in the digital display 1 of the BENNING MM 12.
12/ 2018
Direct current measurement
Alternating current measurement
Resistance measurement
).
Diode testing
Continuity testing with buzzer
Capacity measurement
BENNING MM 12
(Ω,
).

, ) on the
,
, ) on the
,
, ) on the
,
, ) on the
,
31