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The BENNING IT 105 switches off automatically after approx. 5 minutes (APO, Auto-Power-Off). It
-
switches on again, if the rotary switch 1 is switched on from switch position "OFF".
8.1.2
Testing the battery condition
During switch-on and operation, the BENNING IT 105 performs an automatic battery test. Discharged
batteries are indicated by a battery symbol
I flashes, the batteries have to be replaced by new ones immediately (see section 9.3 "Battery replace-
ment").
8.1.3
Test probe with TEST key
The test probe with integrated TEST key can be used instead of the black 4 mm measuring lead. Thus,
the measuring process can be started via the TEST key 4 of the BENNING IT 105 or via the TEST key
of the test probe.
8.2 Voltage (V), Frequency (Hz), rotary field (phase sequence)
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Select the desired function (V) A with the rotary switch 1 .
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Connect the measuring lead to the BENNING IT 105 as shown in figures 3, 4, 5 or 7 and apply them
to the test object.
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Voltage measurement starts automatically. There is no need to press the TEST key 4 or the function
keys F1 to F4 3 .
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The main display K shows the voltage potential between the black L/L1 5 and the blue N/L3 7 meas-
uring input.
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For alternating voltage (AC), the secondary display J additionally shows the frequency (Hz).
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In a three-phase mains, the phase sequence (rotary field) is indicated additionally. Clockwise phase
sequence (phase 1 before phase 2) is given if the symbol "L1 L2 L3" H is shown and the measuring
inputs are connected to the external conductors (phases) as follows:
Black 5 to L1, green 6 to L2 and blue 7 to L3.
Counter-clockwise phase sequence (phase 2 before phase 1) is indicated by the symbol "L1 L3 L2" H.
8.3 Low-impedance resistance (R
Measurements of the protective conductor resistance must be carried out at idle system
parts only.
The protective conductor resistance measurement might be distorted by impedances con-
nected in parallel of additional operating circuits and by transient currents.
If a voltage of > 30 V AC/DC is applied to the test object, a flashing warning symbol
a pulsating acoustic signal will warn you of an external voltage being applied. The external
voltage is indicated on the digital display 2 and measurement will be blocked. Make sure
that the circuit is free of voltage and repeat the measurement.
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Select the desired function (R
-
The symbols of the function keys F1 A to F4 D are briefly shown on the digital display 2 . You can use
the function keys F1 to F4 3 to make the following settings which will be stored until they are changed
for the next time:
F1
Buzzer (F1):
With the buzzer being enabled, a continuous acoustic signal will be emitted at a measured value of < 1 Ω.
Null balance (F3):
In order to carry out a null balance of the measuring lead resistance, connect the measuring leads with
each other by means of the alligator clips and press the function key F3 3 until the symbol
on the digital display 2 .
Measuring lead resistances can be compensated by up to 10 ohms.
03/ 2020
I on the LC display 2 . As soon as the battery symbol
) with 200 mA test current
LOW
) E with the rotary switch 1 .
LOW
F2
–
BENNING IT 105 CH
F3
and
F4
AUTO
C is shown
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