Benning IT 115 User manual

Installation Tester
BENNING IT 115
Operating Manual

Manufacturer:
BENNING Elektrotechnik und Elektronik GmbH & Co. KG
Münsterstr ße 135 - 137
D - 46397 Bocholt
Phone: [phone] - 93 - 0 • Fax: [phone] - 93 - 429
www.benning.de • [email protected]
This symbol on your device ensures that the device complies with the requirements laid
down by the EU European Union) with regard to safety and electromagnetic compatibility
of devices.
© 05/2020 BENNING
This document must not be reproduced or used in any other form without the express written
consent of BENNING.
IDNo. 20 752 415 Part no.: 10141960.06

BENNING IT 115 Content
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T ble of contents
1 Pref ce ............................................................................................................................... 5
2 S fety nd oper ting instructions ................................................................................... 6
2.1 Warnings ..................................................................................................................... 6
2.2 Batteries / storage batteries and charger ................................................................... 10
2.3 Standards applied ..................................................................................................... 12
3 Device description .......................................................................................................... 13
3.1 Front panel ................................................................................................................ 13
3.2 Connection panel ...................................................................................................... 14
3.3 Rear panel ................................................................................................................ 15
3.4 Carrying the installation tester ................................................................................... 16
3.4.1 Attachment of the carrying strap ........................................................................ 17
3.5 Scope of delivery and optional accessories ............................................................... 18
3.5.1 Standard scope of delivery ................................................................................ 18
3.5.2 Optional accessories ......................................................................................... 18
4 Oper ting the BENNING IT 115 inst ll tion tester ........................................................ 19
4.1 Indications and acoustic warning signals ................................................................... 19
4.1.1 onnection monitor ........................................................................................... 19
4.1.2 Battery indication ............................................................................................... 19
4.1.3 Warnings and messages ................................................................................... 19
4.1.4 Evaluation field .................................................................................................. 20
4.1.5 Acoustic warning signals ................................................................................... 20
4.1.6 Help menu ("HELP" key) ................................................................................... 21
4.1.7 Background lighting and contrast ....................................................................... 21
4.2 Function selector switch ............................................................................................ 22
4.3 "SETTINGS" mode .................................................................................................... 23
4.3.1 Language .......................................................................................................... 23
4.3.2 R D testing ....................................................................................................... 23
4.3.3 Isc factor (scaling factor) .................................................................................... 25
4.3.4 ommander ON/OFF ........................................................................................ 25
4.3.5 Initial settings ..................................................................................................... 26
5 Me surements ................................................................................................................. 28
5.1 TRMS voltage, frequency and phase sequence ........................................................ 28
5.2 Insulating resistance.................................................................................................. 30
5.3 Low-impedance resistance / continuity test ............................................................... 32
5.3.1 Low-impedance resistance with a testing current of 200 mA ............................. 32
5.3.2 ontinuity test with a testing current of 7 mA ..................................................... 33
5.3.3 ompensation (null balance) of the test cable resistance .................................. 34
5.4 RCD testing ............................................................................................................... 36
5.4.1 ontact voltage (Uc) .......................................................................................... 37
5.4.2 Tripping time (R Dt) .......................................................................................... 38
5.4.3 Tripping current (R D I) .................................................................................... 38
5.4.4 Automatic test .................................................................................................... 39
5.5 Loop impedance and prospective short-circuit current ............................................... 41
5.6 Line impedance and prospective short-circuit current / voltage drop ......................... 43
5.6.1 Line impedance and prospective short-circuit current ........................................ 44
5.6.2 Voltage drop ...................................................................................................... 45
5.7 Earthing resistance ................................................................................................... 47

BENNING IT 115 Content
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5.8 Testing the protective conductor connection PE) ..................................................... 49
6 M inten nce .................................................................................................................... 51
6.1 Fuse replacement ..................................................................................................... 51
6.2 Cleaning .................................................................................................................... 51
6.3 Periodic calibration .................................................................................................... 51
6.4 Service ...................................................................................................................... 52
7 Technic l d t ................................................................................................................. 53
7.1 Insulating resistance.................................................................................................. 53
7.2 Low-impedance resistance / continuity test ............................................................... 54
7.2.1 Low-impedance resistance R LOW ................................................................... 54
7.2.2 ontinuity test .................................................................................................... 54
7.3 Residual current protection devices RCDs) .............................................................. 55
7.3.1 General data ...................................................................................................... 55
7.3.2 ontact voltage (Uc) .......................................................................................... 55
7.3.3 Tripping time (R D t) ......................................................................................... 56
7.3.4 Tripping current (R D I) .................................................................................... 56
7.4 Loop impedance and prospective short-circuit current ............................................... 57
7.4.1 Zs function (for systems without R D) ............................................................... 57
7.4.2 Zsrcd function (for systems with R D) ............................................................... 57
7.5 Line impedance and prospective short-circuit current / voltage drop ......................... 58
7.6 Earthing resistance ................................................................................................... 58
7.7 TRMS voltage, frequency and phase sequence ........................................................ 59
7.7.1 TRMS voltage (A /D ) ..................................................................................... 59
7.7.2 Voltage of the connection monitor ..................................................................... 59
7.7.3 Frequency ......................................................................................................... 59
7.7.4 Phase sequence (rotary field) ............................................................................ 59
7.8 General data ............................................................................................................. 60
Appendix A Fuse t ble – Prospective short-circuit current .......................................... 61
Appendix B St nd rd nd option l ccessories for specific me suring functions .... 64
Appendix C "Comm nder" test probe, "Comm nder" test plug ................................... 65
C.1 S fety w rnings ................................................................................................ 65
C.2 B tteries ................................................................................................................... 65
C.3 Description of the option l "Comm nders" .......................................................... 66
C.4 LED indic tions of the "Comm nders" .................................................................. 67

BENNING IT 115 Preface
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1 Pref ce
BENNING would like to congratulate you on purchasing this BENNING IT 115 installation tester
and its accessories. The BENNING IT 115 installation tester is a multifunctional tester for testing
electrical installations in compliance with IEC 60364-6 DIN VDE 0100-600) and EN 50110
DIN VDE 0105-100).
The device is intended for the following measurements and tests:
 TRUE RMS voltage, frequency and rotary field phase sequence)
 low-impedance resistance, continuity test
 insulating resistance
 residual current protection devices RCD)
 loop impedance without RCD tripping
 line impedance and voltage drop
 earthing resistance by means of optional earthing kit
The graphic display with background lighting allows easy reading of measuring results,
indications, measuring parameters and messages. Two "PASS" / "FAIL" indications red / green
LEDs) are located next to the LC display.
The BENNING IT 115 installation tester is equipped with all accessories necessary for
comfortable testing. It is kept in a padded carrying case together with all accessories.

BENNING IT 115 Safety and operating instructions
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2 S fety nd oper ting instructions
The following symbols are used both in the operating manual and on the installation tester:
Attention! D nger! Ple se observe the oper ting m nu l!
W rning of d ngerous volt ge!
Protection cl ss II
E rth (volt ge to e rth)
2.1 W rnings
In order to ensure a high degree of operational safety during the tests and measurements and
to avoid damaging of the BENNING IT 115 installation tester, the general warnings listed in the
following must be adhered to.
W rnings – gener l inform tion:
 In c se the inst ll tion tester is not used ccording to this oper ting m nu l, the
protection provided by the inst ll tion tester might be imp ired!
 Ple se re d this oper ting m nu l c refully, bec use otherwise the use of the
inst ll tion tester might involve d ngers for the user, the inst ll tion tester or the
test object!
 Never use the inst ll tion tester or the corresponding ccessories, if they exhibit
visible d m ges!
 Absolutely observe ll gener l s fety instructions in order to void the risk of n
electric shock when h ndling d ngerous volt ges!
 If the fuse F1 h s blown, ple se follow the instructions of this oper ting m nu l to
repl ce it! Only use fuse complying with the specific tion (see ch pter 7.1) s
repl cement.
If one of the fuses F2 or F3 h s blown, the device must not be used nymore. In
this c se, the device must be sent to BENNING for inspection nd rep ir.
 Never use the inst ll tion tester in AC supply systems with volt ges higher th n
550 V AC.
 Any service, rep ir or djustments of the inst ll tion tester nd of the
corresponding ccessories must be c rried out by uthorized qu lified personnel
only!
 Ple se use st nd rd or option l BENNING ccessories only which re v il ble
from your uthorized speci lty ret iler!

BENNING IT 115 Safety and operating instructions
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 Ple se observe th t the me suring c tegory of some ccessories might be lower
th n th t of the inst ll tion tester. Test probes nd "Comm nder" test probes re
provided with det ch ble protective c ps. If these tt ch ble protective c ps re
removed, the me suring c tegory will be reduced to CAT II. Ple se check the
m rkings of the ccessories!
without tt ch ble protective c p, 18 mm tip: CAT II 1000 V to e rth
with tt ch ble protective c p, 4 mm tip: CAT II 1000 V / CAT III 600 V /
CAT IV 300 V to e rth
 The inst ll tion tester comes with rech rge ble NiMh stor ge b tteries. The
stor ge b tteries must be repl ced only s shown on the l bel t the b ttery
comp rtment cover or s described in this oper ting m nu l nd must be
repl ced with stor ge b tteries of the s me type only. Do not use st nd rd
lk line b tteries while the ch rger is connected, bec use otherwise these
b tteries might explode!
 D ngerous volt ges re pplied to the interior of the device! Disconnect ll test
c bles, disconnect the ch rger nd switch off the inst ll tion tester before
opening the cover of the b ttery / fuse comp rtment.
 Absolutely observe ll common s fety instructions in order to void the risk of n
electric shock when working on electric l inst ll tions!
W rnings with reg rd to me surements:
Insul ting resist nce
 Measurements of the insulating resistance must be carried out only at test objects which
are free of voltage!
 Never touch the test object during measurement before it is completely discharged!
Danger of life-threatening electric shocks!
 If the insulating resistance is measured on capacitive test objects, discharging might
take place time-delayed! During discharge, the warning as well as the current
voltage Udisch) are displayed until the voltage falls below 30 V.
 Do not connect any measuring input to an external voltage higher than 550 V AC or DC)
in order not to damage the installation tester!
Low-imped nce me surement / continuity test
 Low-impedance measurements / continuity tests must be carried out on discharged test
objects only!
 The test result might be influenced by parallel impedances.
Testing the PE connection
 If a phase voltage is detected at the PE connection, immediately stop all measurements.
Make sure that the error in the installation is eliminated before going on with the
measurements!

BENNING IT 115 Safety and operating instructions
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Rem rks with reg rd to me surements:
Gener l
 The icon means that the selected measurement cannot be carried out due to
irregular conditions at the input terminals.
 Carry out measurements of the insulating resistance, low-impedance resistance,
continuity and earthing resistance on discharged objects only!
 The "PASS" / "FAIL" indication is activated, if a limiting value has been defined. Choose
appropriate limiting values for evaluating the measuring results.
 If only two of the three test cables are connected to the electrical installation to be
tested, only the voltage value between those two test cables shall be valid.
Insul ting resist nce
 The three-wire test cable as well as the "Commander" test probe can be used for
measuring the insulating resistance.
 If a voltage higher than 30 V AC or DC) is measured at the testing terminals, the
measurement of the insulating resistance cannot be carried out.
 The installation tester automatically discharges test objects after the measurement is
finished.
 Double-click the "TEST" key to carry out a continuous measurement.
Low-imped nce me surement / continuity test
 If a voltage higher than 10 V AC or DC) is measured at the testing terminals, the low-
impedance measurement / continuity test cannot be carried out.
 Before carrying out a low-impedance measurement / continuity test, compensate the test
cable resistance if necessary).
E rthing resist nce
 If a voltage higher than 30 V AC or DC) is measured at the testing terminals, the
measurement of the earthing resistance cannot be carried out.
 If an interference voltage higher than 5 V is detected at the testing terminals H and E or
S, the warning symbol " ” will be displayed indicating that the measuring result might
have been influenced!
Residu l current protection devices (RCDs)
 The parameters set for a measuring function will be taken over for other RCD
measurements as well!
 Contact voltage measurement usually does not involve any tripping of the residual
current protection devices RCD). However, the tripping threshold might be exceeded
due to leakage currents via the protective conductor PE) or via capacitive connections
between the conductors L and PE.
 Compared to the loop impedance RL contact voltage subresult), the measurement of
the loop impedance Zs rcd needs more time, but offers a considerably higher degree of
accuracy.
 The tripping time and tripping current measurement is only carried out, if the contact
voltage at nominal differential current is lower than the preset limiting value of the
contact voltage.
 The automatic test sequence RCD AUTO function) is stopped, if the tripping time is
outside the admissible value.

BENNING IT 115 Safety and operating instructions
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Loop imped nce
 The lower limiting value of the prospective short-circuit current depends on the fuse type,
on the fuse current rating and tripping time as well as on the I SC scaling factor.
 The stated accuracy of the parameters tested shall only apply, if the mains voltage is
stable during measurement.
 Loop impedance measurements Zs) involve tripping of residual current protection
devices RCDs).
 Loop impedance measurements Zs rcd ) normally do not involve tripping of the residual
current protection device RCD). However, the tripping threshold might be exceeded due
to leakage currents flowing to the protective conductor PE) or via the capacitive
connection between the conductors L and PE.
Line imped nce / volt ge drop
 During phase-to-phase measurements of the line impedance Z
I
L-L) with the test cables
PE and N being connected, a warning of dangerous PE voltages is displayed. However,
the measurement will be carried out.
 The stated accuracy of the parameters tested shall only apply, if the mains voltage is
stable during measurement.
 Depending on the connection voltage detected, the test terminals L and N are inverted
automatically.
Testing the protective conductor connection (PE)
 The PE connection can be tested only in switch positions "FI/RCD", "Z
S
L-PE)" and
"Z
I
L-N/L)"!
 For correct measurement of the PE connection, the "TEST" key must be touched for
several seconds.
 Make sure not to stand on an insulated floor, because otherwise the test result might be
incorrect!

BENNING IT 115 Safety and operating instructions
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2.2 B tteries / stor ge b tteries nd ch rger
The installation tester can be operated with six alkaline batteries type AA) or with rechargeable
NiMh batteries storage batteries). The specified operating time refers to storage batteries with
a nominal capacity of 2100 mAh. The batteries' state of charge is permanently displayed in the
lower right part of the LC display. If the battery voltage is too low, this will be displayed as
shown in figure 2.1. This indication is shown several seconds before the tester switches off.
Figure 2.1: Indication of discharged batteries
The rechargeable NiMh storage batteries will be charged automatically as soon as the charger
is connected with the charging jack of the installation tester. The polarity of the charging jack will
be displayed as shown in figure 2.2. An integrated protective circuit controls the charging
process and ensures an optimum battery lifetime.
+
-
Figure 2.2: Polarity of the charging jack
Symbol:
Indication of the storage battery
charging process
Figure 2.3: harging in progress
Gener l w rnings:
 If the installation tester is connected to an installation, a dangerous voltage might be
applied to the battery compartment! Disconnect all test cables / accessories from the
installation tester and switch the installation tester off before replacing the batteries /
storage batteries and before opening the cover of the battery / fuse compartment!
 Please make sure that the batteries / storage batteries are inserted correctly, because
otherwise the installation tester cannot be operated and the storage batteries will
discharge.
 Do not recharge alkaline batteries!
 Use only the charger included in the delivery!
Notes:
 Before the first use! Insert the storage batteries into the battery compartment and charge
the storage batteries for at least 16 hours.
 The charger inside the installation tester is a cell pack charger. This means that the
storage batteries are connected in series during charging. For this reason, the storage
batteries must be equivalent same state of charge, same condition, same type and
same age).
 If the installation tester is not used for a longer period of time, remove all storage
batteries from the battery compartment.
 Use alkaline batteries or rechargeable NiMh batteries of size AA only! It is recommended
to use storage batteries with a minimum capacity of 2100 mAh.

BENNING IT 115 Safety and operating instructions
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 Unpredictable chemical processes might occur during the charging of storage batteries
that have not been used for a longer period of time more than 6 months). In this case, it
is recommended to repeat the charging / discharging cycle at least 2 to 4 times.
 If no improvement is achieved after several charging / discharging cycles, every storage
battery should be tested individually by comparing the storage battery voltages, testing
by means of a cell charger etc.). It is very likely that only some of the storage batteries
have lost capacity. If one storage battery differs from the other ones, this might affect the
correct functioning of the entire storage battery block!
 The effects described above must not be confused with the normal battery capacity
decrease over time. All rechargeable batteries storage batteries) lose some of their
battery capacity when being charged / discharged several times. This information is
provided in the technical data specified by the battery manufacturer.

BENNING IT 115 Safety and operating instructions
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2.3 St nd rds pplied
The BENNING IT 115 installation tester is manufactured and tested in compliance with the
following regulations:
Electromagnetic compatibility (E C)
EN 61326-1 Electrical equipment for measurement, control and laboratory use
– EMC requirements
Class B hand-held equipment in controlled EM environments)
Safety (LVD)
EN 61010-1 Safety requirements for electrical equipment for measurement, control and
laboratory use – Part 1: General requirements
EN 61010-2-030 Safety requirements for electrical equipment for measurement, control and
laboratory use – Part 2-030: Particular requirements for testing and
measuring circuits
EN 61010-031 Safety requirements for electrical equipment for measurement, control and
laboratory use – Part 031: Safety requirements for hand-held probe
assemblies for electrical measurement and test
EN 61010-2-032 Safety requirements for electrical equipment for measurement, control and
laboratory use – Part 2-032: Particular requirements for hand-held and
hand-manipulated current sensors for electrical test and measurement
Functionality
EN 61557 Electrical safety in low-voltage distribution systems up to 1000 V
AC
and
1500 V
DC
– Equipment for testing, measuring or monitoring of protective
measures
Part 1: General requirements
Part 2: Insulation resistance
Part 3: Loop impedance
Part 4: Resistance of earth connection and equipotential bonding
Part 5: Resistance to earth
Part 6: Effectiveness of residual current devices RCD) in TT, TN and IT
systems
Part 7: Phase sequence
Part 10: Combined measuring equipment for testing, measuring or
monitoring of protective measures
Reference standards for electrical installations and components
EN 61008 Residual current operated circuit-breakers without integral overcurrent
protection for household and similar uses RCCBs)
EN 61009 Residual current operated circuit-breakers with integral overcurrent
protection for household and similar uses RCBOs)
EN 60364-4-41 Low-voltage electrical installations – Part 4-41: Protection for safety –
Protection against electric shock
BS 7671 IEE Wiring Regulations 17
th
edition)
AS / NZS 3017 Electrical installations – Verification guidelines
Note on EN nd IEC st nd rds:
 This operating manual contains references to European standards. All standards of the
series EN 6XXXX e.g. EN 61010) correspond to the respective IEC standards with the
same number e.g. IEC 61010). They only differ in the modified parts due to the
European harmonization procedures.

BENNING IT 115 Device description
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3 Device description
3.1 Front p nel
Figure 3.1: Front panel
Caption:
1
LCD
Matrix display with 128 x 64 pixels and background lighting
2
UP
Modifies selected parameters
3
DOWN
4 TEST Start of measurement
PE contact electrode for protective conductor connection
5
ESC
Back / cancel
6
TAB
Selects parameters in the measuring function selected
7
B cklight,
Contr st Modifies background lighting and contrast
8 ON / OFF
Switches the tester on or off;
automatic switch-off "APO") after 15 minutes without
pressing a key
9 HELP Help function with connection diagrams
10 Function selector switch Rotary switch for selecting the measuring functions and
"SETTINGS" mode
11 CAL
For calibrating the test cables in the R LOW and
CONTINUITY function
Starts the Z
REF
measurement in the sub-function ΔU
voltage drop
12
Green / red LED
PASS / FAIL indication of the measuring results

BENNING IT 115 Device description
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3.2 Connection p nel
Figure 3.2: onnection panel
Caption:
1
Test connection
Measuring inputs / outputs
2
Ch rging j ck
For charging rechargeable NiMh storage batteries
3
PS/
2
port
Serial RS232 interface for service
4
Protective cover
5
USB
port
Without function!
W rnings!
 The maximum admissible voltage between the testing terminals and earth is 550 V!
 The maximum admissible voltage between the testing terminals is 550 V!
 The maximum admissible short-term voltage of the external charger is 14 V!

BENNING IT 115 Device description
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3.3 Re r p nel
12
3
Figure 3.3: Rear panel
Caption:
1
Cover of the b ttery / fuse comp rtment
2
Inform tion l bel
3
Screws for the b ttery / fuse comp rtment cover
Figure 3.4: Battery / fuse compartment
Caption:
1
Fuse F1
M 315 mA / 250 V
2
Fuses F2 nd F3
If one of the fuses F2 or F3 has blown, the
device must not be used anymore. In this
case, the device must be sent to BENNING for
inspection and repair.
3
Seri l number l bel
4
Stor
ge b tteries / b tteries
Size AA, alkaline / rechargeable NiMh,
quantity: 6 pieces

BENNING IT 115 Device description
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Figure 3.5: Bottom view
Caption:
1
Inform tion l bel
2
C rrying str p openings
3
L ter l covers
3.4 C rrying the inst ll tion tester
The installation tester can be carried in different ways by means of the accessories included in
the standard scope of delivery.
The tester can be hung
around the operator's neck by
means of the carrying strap.
It is also possible to carry the tester in the padded carrying
case and to use it in a horizontal position. The carrying
case is provided with an aperture for passing through the
test cable.

BENNING IT 115 Device description
- 17 -
3.4.1 Att chment of the c rrying str p
Please choose one of the two methods shown:
Figure 3.6: First method
Figure 3.7: Alternative method
Please check the carrying strap for safe fastening regularly.

BENNING IT 115 Device description
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3.5 Scope of delivery nd option l ccessories
3.5.1 St nd rd scope of delivery
 1 x BENNING IT 115 installation tester
 1 x padded carrying case item no. 10008291)
 1 x test cable with shock-proof plug item no. 10008295)
 1 x universal three-wire test cable black, blue, green) item no. 10008296)
 1 x set of test probes black, blue, green) item no. 10008304 - 10008306)
 1 x set of alligator clips black, blue, green) item no. 10008301 - 10008303)
 1 x carrying strap item no. 10008290)
 6 x rechargeable NiMh storage batteries of size AA
 1 x charger item no. 10008308)
 1 x CD-ROM with operating manual and quick reference guide in PDF format
 1 x quick reference guide
 1 x calibration certificate
3.5.2 Option l ccessories
E rthing kit
Earthing kit, 2 earth rods, 3 test cables,
2 x L = 20 m, 1 x L = 4.5 m Item no.: 044113
"Comm nder" test probe
“TEST“ key for releasing the measuring process,
“PASS“/“FAIL“ indication by means of green/ red LED,
PE contact electrode for detecting the phase voltage at
the protective conductor connection PE, key for
measuring point and LCD illumination Item no. 044155
"Comm nder" test plug
For shock-proof socket, switchable with "TEST" keys,
with "PASS" / "FAIL" indication by means of green/red
LED, PE contact electrode for detecting the phase
voltage at the protective conductor connection PE).
Item no.: 044149
CEE me suring d pter
16 A, 5-pin, for measuring the voltage and phase
sequence rotary field) at 16 A CEE sockets.
Item no.: 044148
Me suring line (40 m)
40 m measuring line with rewinder and wrist strap, for
measuring protective conductor connections.
Item no.: 044039

BENNING IT 115 anagement of measured values
- 19 -
4 Oper ting the BENNING IT 115 inst ll tion tester
4.1 Indic tions nd coustic w rning sign ls
4.1.1 Connection monitor
The connection monitor shows the voltages applied to the testing terminals as well as
information on active testing terminals in the AC mains.
The voltage applied is displayed together with the testing terminal indication.
All three testing terminals L, N and PE are used for the selected
measurement.
The voltage applied is displayed together with the testing terminal indication.
The testing terminals L and N are used for the selected measurement.
The testing terminals L and PE are active testing terminals. The testing
terminal N should be connected as well to show a correct input voltage.
The polarity of the testing voltage applied R LOW, R ISO) is displayed at the
output terminals L and N.
4.1.2 B ttery indic tion
The battery indication shows the current state of charge of the storage battery as well as
whether an external charger is connected.
Battery capacity indication
Low state of charge.
The storage battery's state of charge is too low to ensure correct measuring
results. Replace the batteries or recharge the storage batteries.
Charging in progress with the charger being connected)
4.1.3 W rnings nd mess ges
The following warnings and messages are displayed:
W rning! High voltage is applied to the testing terminals.
W rning!
Dangerous voltage at the PE connection! Immediately stop the
measuring process and eliminate the fault / the connection problem before
continuing with the measurement!
DC VOLTAGE! W rning! Too high DC voltage > 50 V DC) applied to the testing terminals!
The conditions at the input terminals allow starting the measurement. Please
observe further warnings and messages!
The conditions at the input terminals do not allow starting the measurement.
Please observe further warnings and messages!
Measurement is in progress. Please observe warnings that might be
displayed!
The tester is overheated. Measurements are interrupted until the internal
temperature has dropped below the admissible limiting value.

BENNING IT 115 Device description
- 20 -
A high interference voltage has been detected during measurement. This
might result in incorrect measuring results.
L and N have been interchanged.
RCD has been tripped during measurement in RCD functions).
Portable RCD PRCD) has been selected only for documentation purposes).
The test cable resistance for low-impedance measurement / continuity test
has not been compensated.
The test cable resistance for low-impedance measurement / continuity test
has been compensated.
High earthing resistance of the measuring probes. This might result in
incorrect measuring results.
The measuring signal is outside the measuring range This might result in
incorrect measuring results.
Fuse F1, F2 or F3 is defective.
If one of the fuses F2 or F3 has blown, the device must not be used anymore.
In this case, the device must be sent to BENNING for inspection and repair.
4.1.4 Ev lu tion field
The measuring result is within the preset limiting values green LED).
The measuring result is outside the preset limiting values red LED).
Measurement has been aborted. Please observe the warnings and messages
displayed.
4.1.5 Acoustic w rning sign ls
Continuous
sound W rning! Dangerous voltage at the PE connection!