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1 Preface ............................................................................................................................5
2 Safety and operational considerations ........................................................................6
2.1 Warnings and notes .........................................................................................................6
2.2 Batteries ...........................................................................................................................8
2.3 Charging ..........................................................................................................................9
2.4 Precautions on charging of new battery cells or cells unused
for a longer period ............................................................................................................9
2.5 Standards applied ..........................................................................................................10
3 Description of the BENNING IT 110/ BENNING IT 120 B ..........................................11
3.1 Front panel .....................................................................................................................11
3.2 Connector panel .............................................................................................................12
3.3 Back panel .....................................................................................................................12
3.4 Bottom view ...................................................................................................................13
3.5 Carrying the BENNING IT 110/ BENNING IT 120 B ......................................................14
3.6 BENNING IT 110/ BENNING IT 120 B set and accessories ..........................................14
3.6.1 Standard set...........................................................................................................14
3.6.2 Optional accessories..............................................................................................15
4 Operation of the BENNING IT 110/ BENNING IT 120 B .............................................16
4.1 Meaning of symbols and messages on the display of the
BENNING IT 110/ BENNING IT 120 B ..........................................................................16
4.1.1 Online voltage and output terminal monitor ...........................................................16
4.1.2 Messageeld–batterystatus ...............................................................................16
4.1.3 Messageeld–measurementwarnings/messages ..............................................17
4.1.4 Resulteld .............................................................................................................18
4.1.5 Other messages.....................................................................................................18
4.1.6 Sound warnings .....................................................................................................18
4.1.7 Function and parameter line ..................................................................................19
4.1.8 Selecting measurement function/sub-function .......................................................19
4.2 Setting measurement parameters and limits .................................................................19
4.3 Help menu ......................................................................................................................19
4.4 Setup menu ....................................................................................................................20
4.4.1 Supply system setup ..............................................................................................20
4.4.2 Prospective short/fault current scaling factor adjustment ......................................20
4.4.3 Language selection ................................................................................................21
4.4.4 Communication port settings (BENNING IT 120 B only) .......................................21
4.4.5 Activating/ deactivating the COMMANDER (switchable probe tip) ........................21
4.4.6 Recalling original settings ......................................................................................22
4.5 Display contrast adjustments .........................................................................................23
5 Measurements ..............................................................................................................24
5.1 Insulation resistance ......................................................................................................24
5.2 Resistance / continuity testing .......................................................................................25
5.2.1 LowΩresistancemeasurement .............................................................................25
5.2.2 Continuity ...............................................................................................................27
5.3 Testing RCDs .................................................................................................................29
5.3.1 Limit contact voltage ..............................................................................................29
5.3.2 Nominal differential trip-out current ........................................................................29
5.3.3 Multiplier of nominal residual current .....................................................................29
5.3.4 RCD type and test current starting polarity ............................................................29
2


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