11/ 2018
BENNING IT 105
18
Note on optional accessories:
- BENNING TA 5 40 m measuring lead with rewinder and wrist strap, for measuring protective conductor
connections (044039).
4. Description of the installation tester
See figure 1a: Front tester panel/ device top
See figure 1b: Function selector switch
See figure 1c: Digital display
The display and operator control elements specified in figure 1a, 1b and 1c are designated as follows:
1
Function selector switch
2
Digital display, dimensions 95 x 55 mm, with illumination
3
Function keys F1 to F4
4
TEST key
5
Red measuring lead jack L/L1
6
Green measuring lead jack PE/L2
7
Black measuring lead jack N/L3
Function selector switch
A Voltage (V), Frequency (Hz), rotary field
B Insulation resistance (RISO) with 1000 V testing voltage
C Insulation resistance (RISO) with 500 V testing voltage
D Insulation resistance (RISO) with 250 V testing voltage
E Continuity test (RLOW) with 200 mA testing current
F OFF
G Loop/line impedance (ZS/ZI HIGH CURRENT) with high testing current and calculation of the short-
circuit/fault current (PSC/PFC)
H Loop/line impedance (ZS/ZI NO-TRIP) without tripping of RCDs (residual current protection devices)
and calculation of the short-circuit/fault current (PSC/PFC)
I RCD tripping time (AUTO)
J RCD tripping time with ½ x IΔN (RCDt)
K RCD tripping time with 1 x IΔN (RCDt)
L RCD tripping time with 5 x IΔN (RCDt)
M RCD tripping current with ramp test (RCDI)
Digital display
A Symbols of the function key F1. Repeatedly press the F1 key to select the options available in the
selected test function.
B Symbols of the function key F2. Repeatedly press the F2 key to select the options available in the
selected test function.
C Symbols of the function key F3. Repeatedly press the F3 key to select the options available in the
selected test function.
D Symbols of the function key F4. Repeatedly press the F4 key to select the options available in the
selected test function.
E Progress indicator of the loop impedance (ZS, NO-TRIP)
F Symbols of the selected RCD test function
G RCD status. Provides information about RCD tripping.
H Phase sequence indicator
I Battery symbol, status of the remaining battery capacity
J Sub-display for measuring results
K Main display for measuring results
L Mains voltage indicator. Confirms the correct voltage potentials between external conductor and
earth (L-PE), external conductor and neutral conductor (L-N) as well as neutral conductor and earth
(N-PE) for RCD measurement and loop/line impedance measurement.
Indication for correct mains voltage:
Note:
If the mains voltage indicator flashes, check the measuring leads for correct connection or turn the
shock-proof plug of the test cable by 180°:
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