display may become unstable and measurement errors may arise.
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 2 and earth ground is 600 V.
-
COM terminal
-
Input terminal for V, Ω,
-
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 2 could be damaged. A damaged tester presents
an electrical shock hazard to the user!
8.2.1
Voltage measurement
-
Select the appropriate range and voltage type with the rotary switch of
the BENNING MM 2.
-
Connect the black safety test lead to the COM-terminal of the
BENNING MM 2.
-
Connect the red safety test lead to the input terminal for V, Ω,
BENNING MM 2.
-
Connect the safety test leads to the circuit measurement points and read
the measured value on the digital display of the BENNING MM 2.
see Figure 2:
see Figure 3:
8.2.2
Current measurement
-
Select the appropriate range and current type with the rotary switch of
the BENNING MM 2.
-
Connect the black safety test lead to the COM-terminal of the BENNING
MM 2.
-
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 2.
-
Connect the safety test leads to the circuit measurement points and read
the measured value on the digital display of the BENNING MM 2.
see Figure 4:
see Figure 5:
8.3 Resistance Measurement
-
Select the appropriate range with the rotary switch of the
BENNING MM 2.
-
Connect the black safety test lead to the COM-terminal of the
BENNING MM 2.
-
Connect the red safety test lead to the input terminal for V, Ω,
BENNING MM 2.
-
Connect the safety test leads to the circuit measurement points and read
the measured value on the digital display of the BENNING MM 2.
see Figure 6:
8.4 Diode Testing
-
Turn the rotary switch of the BENNING MM 2 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 2.
-
Connect the red safety test lead to the input terminal for V, Ω,
BENNING MM 2.
-
Connect the safety test leads across the diodes and read the measured
value on the digital display of the BENNING MM 2.
-
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"
indicates an open circuit in the diode.
10/ 2004
,
Direct voltage measurement
Alternating voltage measurement
DC current measurement
AC current measurement
Resistance measurement
BENNING MM 2
, of the
, of the
, of the
13