Chauvin Arnoux C.A 6115N User manual

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ENGLISH User's manual
■■
■■
■INSTALLATIONTESTER C.A6115N

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Meaning of the symbol:
WARNING! Please refer to the User’s Manual before using the instrument.
In this User’s Manual, instructions preceded by the symbol above, should they not be carried out as
shown, can result in a physical accident or damage to the instrument and installations.
Meaning of the symbol:
This instrument is protected by double or reinforced insulation. It does not require connection to the
protective conductor terminal to ensure electrical safety.
Thank you for purchasing a C.A 6115N Installation Tester.
To get the best service from this instrument:
nread this user’s manual carefully,
nrespect the safety precautions detailed.
SAFETY PRECAUTIONS
■Do not splash or immerse the C.A 6115N tester in water under any circumstances.
■This instrument may be used on category III installations for voltages not exceeding 300 V in relation
to earth. Category III meets with strict reliability and environmental requisites corresponding to
permanent use on fixed industrial installations (see IEC 664-1).
■Do not use the C.A 6115N tester on installations exceeding 300 V in relation to earth.
■Use connection accessories of overvoltage category and service voltage greater than, or equal to,
the measurement instrument (300 V Cat III).Only use accessories that comply with safety standards
(EN 61010-2-032).
■If a fuse should blow, please follow the instructions detailed in this brochure to replace it!
■All repairs and metrological checks must be carried out by qualified and approved personnel!
WARRANTY
Our guarantee is applicable for twelve months after the date on which the equipment is made available
(extract from our General Conditions of Sale, available on request).

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CONTENTS
1. GENERAL PRESENTATION ............................................................................................................ 4
2. DESCRIPTION OF THE INSTRUMENT ........................................................................................... 6
3. USING FORTHE FIRST TIME ......................................................................................................... 7
4. GENERAL USE ................................................................................................................................8
4.1 Automatic checks of measurement conditions ........................................................................ 8
4.2 Connecting the instrument ....................................................................................................... 8
4.3 C.A 6115N Operating principle ................................................................................................9
4.4 Changing settings (thresholds …) ..........................................................................................9
4.5 “SET UP” = General settings .................................................................................................10
4.6 Standby mode (Power down-Pd) ...........................................................................................11
4.7 Power up information ............................................................................................................. 11
4.8 Remote control probe ............................................................................................................ 11
4.9 Error codes CA 6115N (listed according to Software Version) ............................................. 11
5. MEASUREMENTS.......................................................................................................................... 12
5.1 Checking phase position with the mains plug ....................................................................... 12
5.2 Checking the protective conductor PE (earth) ...................................................................... 13
5.3 Measuring voltage and frequency .........................................................................................14
5.4 Measuring current and leakage current with a clamp ........................................................... 15
5.5 Measuring insulation resistance ............................................................................................17
5.6 RCD testing ............................................................................................................................ 20
5.7 Measuring earth resistance RA (Za since Software version 2.8) .........................................25
5.8 Measuring loop impedance : Short-circuit current / Fault voltage /Earth..................................
impedance/selective Resistance ........................................................................................... 29
5.9 Measuring resistance / testing continuity ..............................................................................36
5.10 Determining phase order ....................................................................................................... 38
5.11 Measurement lead compensation .......................................................................................... 39
6. RS232 INTERFACE / MEMORY .................................................................................................... 40
6.1 Technical specification of the RS232..................................................................................... 40
6.2 Saving / Calling up measured values .................................................................................... 41
6.3 Printing measured values ...................................................................................................... 43
6.4 Saving or printing at programmable intervals ........................................................................ 45
7. SERIAL-TO-PARALLEL ADAPTER (RS232 - CENTRONICS) (OPTIONAL) .............................. 46
8. C.A 6115 UTILITY WINDOWS SOFTWARE FOR PC (OPTIONAL)............................................. 47
9. CONTINUITYTEST ADAPTER (OPTIONAL - UK MARKET ONLY) ........................................... 47
9.1 Description .............................................................................................................................47
9.2 Procedure ............................................................................................................................... 48
9.3 Calculating values .....................................................................................................................48
9.4 Comments on the 2 different methods .................................................................................. 48
10. CLEANING AND MAINTENANCE ................................................................................................. 49
10.1 Cleaning ................................................................................................................................. 49
10.2 Charging the battery .............................................................................................................. 49
10.3 Replacing the fuses ...............................................................................................................49
10.4 Storage .................................................................................................................................. 50
10.5 Metrological check ................................................................................................................ 50
10.6 After-sales service ................................................................................................................ 50
11. ORDERING REFERENCES ........................................................................................................... 51

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1. GENERAL PRESENTATION
The C.A 6115N is a measurement instrument designed for testing the safety of electrical installations.
Measurement functions: Voltage,frequency, current/leakagecurrent, insulation resistance,RCD’s,earth
resistance – selective earth resistance, fault voltage, loop impedance, short-
circuitcurrent, resistance/continuity, phase order, protectiveconductor testing,
checking connections
Display: 3 ½ digits (1999 counts), LCD – with back-light
LL
COM
R
Operating controls: Central selector switch and control buttons
ENVIRONMENTAL CONDITIONS
Altitude: up to 2000 m
Operating temperature: -10° C. . .+ 50° C
Temperature rating: 0° C. . .+ 35° C
Storage temperature: -20° C. . .+ 60° C
Temperature coefficient: ± 0.1% L/K
Relative humidity: 80% max up to 31°C without condensation
Indoor use
Permissible errors and use errors: concern nominal temperature range and sine current or voltage
Pollution degree: 2, absence of pollution or dry, non-conductive, pollution.
From time to time, temporary conductivity caused by condensation may be
allowed. E.g., closed and heated surroundings without fog or vapour.
SAFETY
Protection index: IP 40 as per EN 60529
IK 04 as per EN 50102 (Ed. 95)
Protection class: compliant with protection class II as per EN 61010-1 (Ed. 95)
Safety: EN 61010-1 300 V installation category III,
Pollution degree 2 + EN 61557 (Ed.97)
Input protection: By software lock, with varistors against voltage
Urms 600 V and HRC fuse: M-3.15 A-500 V-10 kA-6.3 x 32 mm
Fuse-protected clamp input: M-2 A-380 V-10 kA-5 x 20 mm
Permissible overload: Urms max. = 500 V for all functions
EMC: Emission according to EN 50081-1 (Ed. 92)
Immunity according to EN 50082-2 (Ed. 95)
Power supply: NiMH 7.2 V/1000 mAh rechargeable battery with incorporated charger
Connection via test lead

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Charge time: max. 120 Min. (fast charge)
Number of measurements
per charge: Min. of 1500 with use of maximum current (i.e. insulation measurements at 500 V)
Dimensions: 295 mm x 230 mm x 108 mm (L x W x H) with cover;
Weight: approx. 2.1 kg with rechargeable battery

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2. DESCRIPTION OFTHE INSTRUMENT
1Rotating selector switch, used to select the required measurement function and to switch OFF the
instrument.
2Charge indicator LED, comes on or flashes during automatic charging when the selector switch is
on the “OFF/CHARGE” position and the instrument is plugged into the mains.
3Button used to start the test chosen using the selector switch.TheTEST is begun when this button
is released, except for INSULATION or CONTINUITY tests that start immediately.This button also
enables the operator to check for possible voltage presence or breaks in the protective conductor
PE (ground).
4Button used to display additional information and values measured besides the main value, and/or
to turn on the display backlight (press for over 2 seconds).
5Multi-function button used to select the insulation test voltage (100V, 250V or 500V), for function
selection during RCD testing: without tripping ( ); AC positive phase ( ) ; AC negative phase
() ; DC positive phase ( ) ; DC negative phase ( ). For setting limit values, for choosing
memory locations and for switching statuses : from an indication of measurement results into
active voltage measurements.
1
2
3
4
5
678
9
10 11 12 13 14
15
16
17

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6Multi-function button for selecting functions during RCD testing: measurement of trip current with
RAMP( ); measurement of tripping time in pulse mode: test at I∆N; selective test at 2 I∆N(); 5 I∆N,
150 mA or 250 mA. Also used for setting limit values, choosing memory locations. And switching
statuses: from an indication of measurement results into active voltage measurements.
7Multi-function button for saving measured values (MEM), or for calling up saved values (MR).
8Multi-function button for printing out measured values (PRINT), or accessing the “SET UP” menu
(PROGRAMMING) if pressed for longer than 2 seconds.
92000 count LCD display , 17 mm digits with automatic decimal point, different symbols and units,
back-light with auto switch-off.
10 Input for current clamps (two 4mm ∅safety sockets)
WARNING:Only to be used with original clamps,compliant with the EN 61010 standard,
with safety leads!
11 Fuse for the current clamp input (M-2 A-380 V-10 kA-5 x 20 mm).
12 Terminal for earth probe (4 mm ∅safety socket).
13 Measurement connection terminals, (3 x 4mm Ø safety sockets).
WARNING: Maximum voltage in relation to earth = 300V.
14 RS232 Interface, 9-pole SUB-D (for wiring, see “ RS232 Interface “ chapter).
15 Mechanism for securing the lid in different positions.To change the position, pull the LH and RH
slides simultaneously upwards and pivot the lid.
CAUTION! Never force the lid open!
16 Carrying strap.
17 Label with the technical specifications and wiring diagrams.
3. USING FORTHE FIRSTTIME
The C.A 6115N is fitted with NiMH rechargeable batteries that should be charged up before using the
instrument for the first time.To do this, proceed as described in §9.2.
Opening the instrument lid:
Pull the slides on either side of the lid, opening it up at the same time.Then let go of the slides and angle
the lid in the desired position.
CAUTION: Never force the lid open!
The position for on-site use (lid open at 115°) is a locked position, for greater
ease-of-use during measurements.Always use the slides to release this position
by moving them backwards or forwards.
To close the lid, use the slides and close.
NOTE : When the lid is opened to 180°, it can even be removed.When replacing the lid, check that it is
correctly in place before trying to rotate it. Never use force.

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4. GENERAL USE
The C.A 6115N is extremely easy to use, irrespective of the measurement function selected.
1. Turn the selector switch to the required measurement function.The instrument is in standard set-up.
2. Connect the instrument following the wiring diagrams specified in this User’s Manual.
3. Start measurement using the “TEST” button.
NOTE: Beginning with the version 2.8 of the C.A 6115N, there are two ways to start a measurement
with the test button.A short press starts a normal measurement.A long press (> 2 sec. till the buzzer
sounds) causes the instrument to measure the mean value out of 10 single measurements.This is
useful in case of heavy disturbances.This feature is applicable in all functions where a loop resistance
or an earth resistance is carried out.
4. Read off the measurement result or call up additional results using the “MORE” button.
5. Save the results using the “MEM/MR” button or print them out using the “PRINT” button.
4.1 Automatic checks of measurement conditions
The C.A 6115N automatically tests the measurement conditions before the start of each test, e.g.;
- Mains voltage
- Frequency
- Temperature inside the tester unit
- Battery charge state
- Lack of voltage when measuring insulation and resistance
- Lack of voltage on the protective conductor PE (ground)
- Correct connection of leads: an earth is checked for with every measurement, thanks to the TEST
button.
If these conditions do not prove to be satisfactory for measurement to take place, the instrument will not
undertake any measurement and displays the reason why.
The values measured are also checked automatically.For example, should the programmed limit values
be exceeded, a visible and audible alarm is triggered!
If the fuses necessary for measurement are defective, the instrument indicates “- - - -” on the LCD
screen.
4.2 Connecting the instrument
On installations with mains outlet sockets, use the test lead with the mains plug.This way you will avoid
wiring errors and make best use of all the instrument’s measurement possibilities.
The C.A 6115N automatically indicates the mains phase position. It also indicates if the neutral wire is
not connected with “L”.
NOTE: to avoid indication errors, use only the original measurement cables.
Forresistance,insulationresistanceand phaseorder measurements,as wellasfordistributionswitchboard
measurements, use the measurement cable with 3 separate leads.
If measurements have to be carried out with the earth probe, the probe lead (green lead with winder)
must be connected to the " "terminal. The instrument automatically checks that the connection is
made and displays the corresponding non-flashing symbol. If the symbol does flash however, this is
either because the probe is necessary but not connected, OR because the probe is prohibited for the
measurement in question.
If the current clamp is connected, the corresponding symbol comes up on the display. If this symbol
flashes, this means that the clamp is necessary for the selected measurement but that it is not connected
OR that the clamp is connected but prohibited for the selected measurement.

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4.3 C.A 6115N Operating principle
The C.A 6115N has two main operating modes:
1. Before measurement (having just turned the selector switch to one of the different positions) :
The C.A 6115N is monitoring the measurement conditions.By pressing the “MORE” button, you can
read off: the voltage between different connected terminals, the frequency, the current measured by
the clamp (if connected), the limit values that have been programmed-in, as well as other parameters
depending on the function chosen with the selector switch: limit of contact voltage, reference voltage
for short-circuit current calculation, insulation test voltage…
■At this point you can consult all of these values with the “MORE” button and change them if need
be using the “SELECT” and “CHANGE” buttons when it is possible.
■If you press the “MEM / MR” button, the C.A 6115N switches to Memory Recall mode (MR), since
no measurement has yet been started (see chapter 6.2).
■If you press the “PRINT” button, the C.A 6115N switches to‘Printing measured values’mode (see
chapter 6.3).
2. After measurement (you have pressed the“TEST” button) :
The C.A 6115N indicates the different measurement results, which can be read off by pressing the
“MORE” button.
■If the instrument shows“ - - -”as being the measurement result, the measurement was interrupted
by a problem (test leads not connected to the instrument, defective fuse…) or by some other
disturbance. Start again.
■If you press on the “MEM / MR” button, the C.A 6115N switches to Saving mode to store the
measurement made. See chapter 6.2.
■If you press the PRINT button, the C.A 6115N switches to immediate Printing mode to print out
the measurement made.
Before or after a measurement, the procedure for displaying secondary parameters by pressing the
“MORE”button can be simplified and made shorter by going to the“SET-UP” menu (see chapter 4.5), or
even more simply still by using the optional PC software with the C.A 6115N.
Return to the status “Before measurement” (voltage measurement). Switch the main rotary switch to
another position, or push “CHANGE” or “SELECT”. Measured values are then erased.
4.4 Changing settings (thresholds …)
Severalvariablescanbe set on theC.A6115N (thresholds, …)dependingon the selected measurements.
This enables the operator to easily evaluate measurement results.
All of these variables are factory pre-set to practical values. If necessary, they can be changed directly
on site in the instrument. However, for safety reasons, these modifications are lost when the C.A 6115N
is switched off again.
Each time the instrument is switched off, the factory pre-set values are restored.
If the modifications have to be permanent, they must be carried out using the optional PC software for
the C.A 6115N.
Function Default variable values
Insulation test Test voltage, UN= 500 V, Limit Rlim = 500 kΩ, Buzzer bu = ON
RCD test UL= 50V, Measurement of ZS= ON, Display of IK= ON, UREF = 230V, Buzzer bu = ON
Earth test RAlim = 100 Ω, Lead compensation R∆∆
∆∆
∆= ON
Loop test ZSlim = 100 Ω, Reference voltage UREF = 230 V, Lead compensation R∆∆
∆∆
∆= ON
Continuity test Limit Rlim = 5 Ω, Lead compensation R∆∆
∆∆
∆= ON
Phase rotation test No variable

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Changing variable settings:
1. Turn the selector switch to the required position.
2. Press the “MORE” button several times in order to display the variables. Change them using the
“CHANGE” and “SELECT” buttons.
3. To save the changes, press the “MORE” button.
4.5 “SET UP” = General settings
This mode makes it possible to adapt the general settings on the C.A 6115N to the specific needs of the
operator, including: setting standby mode on/off, the buzzer, date, time, lead compensation, RS232
baud rate …
This makes it possible to either set up the C.A 6115N either as an extremely easy to use instrument that
displays just the main measurement results/parameters, or as a more comprehensive instrument that
besides displaying the main measurement results/parameters, also gives a number of useful secondary
results/parameters depending on the function selected.
Below is the list of general settings that are possible:
Pd Standby mode on/off Set to off - prevents the standby mode from coming into effect
(saves batteries) when not used for several minutes
bu Buzzer on/off Set to off - prevents monitoring of limits with audible beep
dAt Date 06 05 96 Set date using “SELECT” and “CHANGE”
tim Time AM 12:31 Set time using “SELECT” and “CHANGE”
R∆Compensation R: on/off Set to off - removes lead compensation
bd Baud rate: 300...9.6 K.. - - - RS232 interface speed
When “- - -”is displayed,this signifies serial-to-parallel mode
(to be chosen for A4 parallel printer
with optional adapter. See § 7)
When “ -P-” is displayed, this means the remote control
probe can be used (see § 4.7).
prt Print format: doc/prt doc : “Documentation”-type printing
prt : “Protocol”-type printing
The rest of the SET-UP menu below lists the secondary parameters/results that can be shown or hid for
each function. The “x”’s indicate the functions where there is a parameter/result display “ON/OFF”
option:
Parameter Setting RCD EARTH LOOP INSULATION LOW Ω
int Interval selection 0.1...199.9 min X X
(auto recording mode)
ULContact voltage limit on/off X X
UREF Reference voltage for IKon/off X X
IKShort-circuit current on/off X
ZSLoop impedance on/off X
ZSlim Loop impedance limit on/off X X
RSLoop resistance on/off X X
RAlim Earth resistance limit on/off X
R lim Resistance limit on/off X X
ZAEarth impedance (1) on/off X X
(1) Only settable with the Utility Software Version 3.2

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To change settings:
1. Turn the selector switch to the required position.
2. Press the “Print / SET-UP” button for over 2 seconds. – All segments of the display come on.
3. You can now press the “MORE” button several time to go through the “SET-UP” parameters and
change them accordingly using the “CHANGE” and “SELECT” buttons.
4. To quit “SET UP”and save the changes made, press the “MORE” button until you have worked all the
waythroughSET-UP,orpressthe“TEST”button.If youturntheselector switch,thechanged parameter
settings will not be saved after the instrument is switched off.
4.6 Standby mode (Power down-Pd)
To prolong battery life, the instrument switches to standby mode approximately 1 minute after being left
idle – the screen indicates “ - - -”.The display can be reactivated by pressing any button.
This standby function can be deactivated in “SET UP”.
4.7 Power up information
After a short display test with all segments some numbers are indicated before the instrument switches
into the voltage measurement status.The numbers show the software version (2 digits on the left) and
the instrument number, composed of 6 digits :3 digits main display and 3 digits upper right.
Example: 28 300 001 Means: 2.8 Software version
300 001 Instrument number
4.8 Remote control probe
This probe plugs into the C.A 6115N’s RS232 socket. It is
fitted with a 4 mm safety socket on its underside, making it
possible to connect one of the three test leads, L, N, or PE.
All measurements can be carried out using the yellow button
on the probe, which is the equivalent of the “TEST” button on
the C.A 6115N.
WARNING: The test for PE-voltage (connected to earth) is
not carried out with the probe.
A push button on the back of the probe enables the operator
to light up the measurement point (approx. 500 lux.
Illumination).This function can be very handy when making
measurements on powered down installations for example.
To use the probe, first set the “bd = baud rate” to “-P” in the
“SET-UP” menu (see § 4.5).
4.9 Error codes CA 6115N (listed according to Software Version)
V2.3: E00 - microcontroller program check-sum error
E01 - stack overflow
E02 - program status error
E03 - display value out of range
E04 - memory (MEM/MR) check-sum error
E05 - EEPROM check-sums (one of 4)
E06 - watchdog reset
E07 - EEPROM communication
E08 - RTC initialisation or access error
E09 - bistable relays control
Remote
control
probe
RS232
socket
Croc-clips

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Extensions in V2.4:
E05 - EEPROM check-sum - printer data
E15 - EEPROM check-sum - rotary switch calibration data
E25 - EEPROM check-sum - measurement calibration data
E35 - EEPROM check-sum - instrument number
Extensions in V2.7:
E09 – shows the number of a faulty relay if test fails in the right upper display corner
Extensions inV2.8:
E45 – EEPROM – wrong contents for constants for measurement
These error messages help to find the right diagnosis for repair.In any case, it is necessary to send the
instrument to an authorised service center.
5. MEASUREMENTS
5.1 Checking phase position with the mains plug
This function is useful for quickly identifying the conductor with more than 20 Volt detected at the PE
input (phase) in mains sockets, thus avoiding the use of the traditional test lamp.The test lead with the
mains plug on it should be used for this. A non connected neutral wire is also indicated.
5.1.1 Description of the function
The voltage of “L”and “N”conductors is measured in relation to the “PE”conductor (ground).The highest
voltage (> 20 V) is designated as a phase and indicated by the L in the "
LL
" symbol shown on the
instrument’s LCD screen. This position indication is made in relation to the marking situated on the
mains plug (white point).If both “L” segments are indicated you, the voltage indications make it possible
to identify the problem. If the voltages L-PE and N-PE show the same mains voltage e.g. 230 V, the N
wire is poorly connected to phase. If the voltage N-PE shows half of the mains voltage e.g. 115 V, then
the N wire is not connected.
WARNING: It cannot be assumed that contact with the conductor that is not designated by “L” is safe.
The instrument only indicates the highest voltage in relation to the PE!
If using the measurement cable with 3 separate leads, make sure that the PE lead (white)
is correctly connected to the network.
5.1.2 Technical specifications
Voltage rating : 20 - 300 V; 15.3 ... 420 Hz
Internal resistance : Approx. 400 kΩ
Maximum overload : Vrms max. = 500 V
5.1.3 Performing a measurement
1. Connect the C.A 6115N to the installation, as
illustrated.
2. Select any position with the switch
Check that the white point on the mains plug
can be seen from above.
3. Meaning of the different indications displayed:
L
= the highest voltage in relation to the earth
(PE)is on the left-hand pin of the mains
plug
L1
L2
L3
N
PE

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L
= the highest voltage in relation to the earth (PE) is on the right-hand pin of the mains plug
If using the measurement cable with 3 separate leads:
If "
L
" appears, this means that L1(red) presents the highest voltage in relation to the PE conductor
(white). If "
L
" appears, this means that L2(yellow) is connected to the highest voltage.
NOTE:To avoid indication errors , use original measurement cables only.
5.2 Checking the protective conductor PE (Earth)
When the user touches the conductive “TEST” button, the instrument checks whether a voltage > 50 V
is present on the protective conductor (PE) compared with the neutral earth, whether the protective
conductor is there or not or whether there is a break in it.
If no PE earth is detected by the instrument but you wish all the same to carry out a measurement that
does not use the earth, you must press the “TEST” button with an insulating tool: glove, pen…
5.2.1 Description of the function
An integrated network of high resistance values between L, N and PE enables the protective conductor
PE to be polarised.When making contact with the conductive “TEST” button, the operator establishes a
link with the potential of the protective earth connection via the resistance of his body. If the protective
conductor is live or is missing, a difference in potential is detected, evaluated by the processor and
reported by “PE”. An audible signal is triggered at the same time.
5.2.2 Technical specifications
Test: Protective conductor, to check for voltage presence or a break.
Voltage:> 50 V - 300 V AC 16-300 Hz
Measurement of the voltage difference between the contact electrode (“TEST” button) and the PE line
Interruption: Automatic marking and locking of the measurement, at a network voltage of 90 – 440V ;16 – 65 Hz
Internal resistance: approx. 700 kΩ
5.2.3 Making a measurement
1. Connect the C.A 6115N to the installation,
as illustrated opposite.
2. Select any position with the switch except
phase order determination.
When using the measurement cable with
3 separate leads, check that the PE (white
lead) is correctly connected.
3. Touch the “TEST” button (the user’s body
must not be insulated from earth: do not
wear insulating shoes, or use a plastic
object to make contact with the “TEST”
button,butrather touchan earthed element
such as a water pipe…)
The indications mean: ■“PE”withUL-N =networkvoltageandUL-PE,UN-PE =approximately50%networkvoltage.
The protective conductor PE (earth) is interrupted or connected to high ohmic
values!
■“PE” with UL-N = 0 , and UL-PE, UN-PE = 100% network voltage.
The protective conductor PE (earth) is at network voltage!
WARNING! Risk of electrocution! Power down the installation, make it safe and eliminate
the faults.
L1
L2
L3
N
PE

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5.3 Measuring voltage and frequency
5.3.1 AC/DC voltage measurements - Technical specifications
All measured values are calibrated for a sine wave.
Measurement range Range Resolution Frequency range
95 … 440 V 0 … 500 V 1 V DC - AC 15.3 … 450 Hz
Accuracy: ± (1 % of R. + 1 ct)
Internal resistance: Approx. 400 kΩ(L - N - PE)
Permissible overload:Urms max. = 500 V
5.3.2 Frequency measurement – Technical specifications
This is possible in all switch positions.
Measurement range Resolution Operating range
15.3 … 99.9 … 450 Hz 0.1 … 1 Hz 5 … 400 V
Accuracy: ± (0.01 % of R. + 1 ct)
Internal resistance: Approx. 400 kΩ(L - N - PE)
Permissible overload: Urmsmax. = 500 V

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5.3.3 Measuring voltage and frequency
1. Connect the instrument according to the
diagram opposite.
2. Select any position with the switch
3. Read off all the measurements using the
“MORE”button.
4. To save or print out voltages and
frequencies,a liveTEST (RCD, earth,loop,
phase rotation) must be run with theTEST
button;voltagesand frequenciesarealways
saved or printed with the test made.
WARNING!: Voltages and frequencies saved by aTEST can only be displayed whilst printing out
or transferring measurements stored in memory to a PC and EXCEL; The
environmental parameters of measurements (voltages, frequency, current) cannot
be displayed on the LCD screen in Memory Recall mode): see chapter 6.2.
5.3.4 Error indications - Comments
Display Meaning Comments
Measurement range exceeded Voltage above 500 V
Measurement not possible, Frequency above 450 Hz
frequency outside of the nominal
range or DC Frequency less than 15.3 Hz or DC
Measurement not possible, Voltage < 0.1 V
no voltage present
Measurement not possible Charge batteries
Battery discharged if the indication appears several times
àAfter-sales service
5.4 Measuring current and leakage current with a clamp
This function is used to measure very low currents of around a few mA (fault currents, leakage currents,
etc...) up to currents of around 300 A AC.
Using a clamp gives the best safety possible during measurement.
5.4.1 Description of the function
A current clamp with a 1000:1 transformation ratio is connected via an operational amplifier input (OP).
Theresulting power-lessflowof current considerablybroadens the clamp’s measurement range,enabling
even traditional high current measurement clamps to measure down in the mA region.
L1
L2
L3
N
PE

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5.4.2 Technical specifications
Clamp Measurement range Resolution Bandwidth Accuracy
C103 0.004 … 300 A 1 mA … 1 A 45 ... 450 Hz ± 2% of R. ± 1 ct *
MN21 0.003 … 200 A 1 mA … 1 A 45 … 450 Hz ± 2% of R. ± 1 ct*
* in relation to current clamps C 103 and MN 21
NOTE: If the measured valuesfluctuategreatly,thismeansthat the network voltageis disturbed, (voltage
peaks, interruptions to supply etc.) or that the frequency is not stable. In such cases, one must
also expect fluctuations in the values measured depending on the network voltages, for example
loop (ZS), earth (RA), RCD (DDR-RCD-FI), etc...
WARNING:Ifthe instrumentis connected tothenetwork orthered indicator is on, theinputterminals
may be live!
Only connect clamps compliant with EN 61010 to these terminals, with safety
leads such as those supplied optionally for the C.A 6115N.
WARNING:No foreign voltage should be applied to the clamp inputs!
Otherwise the protective fuse will blow and the input may be damaged!
5.4.3 Performing a measurement
1. Turn the selector switch to any position and connect
the clamp to the “Clamp” terminal.
" " is displayed automatically,
-If not, bring up the indication “I...A” on the display
using the “MORE” button. .
2. Connect the clamp to the circuits whose current is
to be measured, as shown on the connection
diagram.
3. Read off the measurement.
To save or print out the current measured, a TEST
(RCD, earth without clamp, loop without clamp, phase
rotation) should be started with the TEST button; the
current as well as voltages and frequency are always
saved or printed with the test made.
To save the leakage current values at regular intervals,
see chapter 6.4.
WARNING: The current value saved by aTEST can only be displayed when printing or transferring
measurements stored in memory to a PC and spreadsheet (EXCELTM...) software.The
environmental parameters of measurements (voltages, frequency, current) cannot be
displayed on the LCD screen in Memory Recall mode): see chapter 6.2.
NOTE: If the instrument’s red “Clamp Input” terminal is connected to a lead and the LCD does not
display the “Clamp” symbol, the clamp’s fuse has without a doubt blown (changing it is possible
via the front of the instrument).
L1
L2
L3
N
PE

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5.4.4 Error indications
Display Meaning Comments
Measurement range exceeded Measured current too high,
wrong clamp (e.g. 100:1) or
foreign voltage connected
Frequency out of 45…450Hz
Measurement not possible range or current too low
Charge batteries
Measurement not possible If the indication appears several
Battery discharged times àAfter-sales service
5.5 Measuring insulation resistance
This function is used to measure insulation resistance up to 600 MΩ(300 MΩat 100-250 V).There is a
choice between test voltages of 500, 250 and 100 V DC, with a nominal current > 1 mA, complying with
DIN VDE 0413 and EN 61557 (Ed.97). Insulation resistance measurement can be made automatically
between 3 points, L - N - PE for example, without changing the position of the leads.
5.5.1 Description of the function
The voltage present on the terminals is measured first. If less than 20 V, the selected test voltage (500/
250/100 V DC) is generated upon pressing “TEST”. After each measurement, capacitances that are
possibly still charged are discharged across an internal resistance; the voltage is then displayed
automatically, provided that it is exceeds 20 V. In the “L - N - PE” function, the instrument automatically
measures the insulation resistance between the terminals in one go: L-N, L-PE and N-PE.
5.5.2 Technical specifications
Measuring insulation resistance according to EN 61557-2 (Ed. 97) / DIN VDE 0413 part 1 (9/80)
Nominal voltage: 100 ; 250 ; 500 V DC switchable
Voltage at open circuit: ≤1.05 x UN ±5V
Nominal current: ≥1 mA DC
Short-circuit current: < 12 mA DC
Permissible overload: Urmsmax. = 600 V AC
Max.: Urms = 50 V AC (Measurement is not made)
Measurement duration: For as long as “TEST” is pressed down, or 4 s in automatic mode
Automatic discharge after each measurement, across 400 kΩ.

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Measurement range Resolution Accuracy
5 kΩ…9.99 MΩ…600/300* MΩ1 … 10 … 100 kΩ… 1 MΩ± (6 % R + 1 ct)
* only at 100 V, 250 V
Measurement range of Resolution Accuracy
DC voltage
1 … 520 V 1 V ± (1 % of R + 1 ct)
5.5.3 Diagram of measurement voltage at closed circuit
5.5.4 Performing a measurement
0,5 125 10 20 50 100 200 500 1000
0
50
100
150
200
250
300
Voltage (V)
Resistance (k )W
0,5 125 10 20 50 100 200 500 1000
0
100
200
300
400
500
600
Voltage (V)
Resistance (k )W
Graph of voltage/resistance at 100V Graph of voltage/resistance at 250 V
0,5 125 10 20 50 100 200 500 1000
0
20
40
60
80
100
120
Voltage (V)
Resistance (k )W
Graph of voltage/resistance at 500V
L1
L
L2
L3
Force de
750 N (sol)
250 N (paroi)
Force de
750 N (sol)
250 N (paroi)
N
N
PE
PE
Plaque de bois
Plaque métallique
Tissu humide
Sol
Plaque de bois
Plaque métallique
Tissu humide
Sol

19
1. Connect the instrument as shown in the connection diagram.
2. Turn the selector switch to “INSULATION”, automatic L - N - PE or L-PE (2 poles)
If using a measurement cable with 3 separate leads for a bipolar L-PE measurement, the N lead
(yellow) that is not used should be connected to the PE lead (white).
If using the measurement cable with the mains plug, the instrument considers that the phase is found
to the right of the white point situated on the mains plug.
3. Press the “TEST” button.
For a bipolar L-PE measurement, hold down the button until the indicated value stabilises.To stop the
measurement, let go of the button.
4. Read off the measurement.
Theresidual direct voltagefollowingthemeasurement is automatically displayed.During this process,
all the capacitances discharge at the same time.This function is automatically activated after each
measurement until the voltage is less than 20 V !
To start a new measurement, press the “TEST” button once more.
Toreturn to the displayof the networkvoltageUL-N, turn the selectorswitch or press CHANGE or SELECT.
WARNING:If there is a capacitive component in the tested element, the measurement can
produce voltages of 510 V which is hazardous for the user. Always let the tested
element discharge through the instrument following measurement. Devices that
are sensitive to overvoltages, e.g. microprocessor- controlled systems, should be
disconnected for safety reasons during measurement.
CAUTION! Insulation resistance measurements are only authorised on non-live installations.The
absence of voltage is automatically checked for during connection.If the voltage is > 20
V, measurement will not be carried out.
NOTE: If users are connected to the network before measurements, ensure that they are disconnected
during the measurement on at least one terminal, (by removing the fuse for example). If the required
insulation resistance values are not achieved, appliances should be completely disconnected from the
network.
5.5.5 Evaluation of the measurement values
The table below gives the minimum values that should be displayed, taking into account error in
measurement, so as to be sure of having sufficient insulation. (see standards).
Theoretical insulation value Minimum values displayed
100 kΩ0.107 MΩ
250 kΩ0.266 MΩ
500 kΩ0.531 MΩ
1000 kΩ1.061 MΩ
10 MΩ10.61 MΩ
100 MΩ106.1 MΩ

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5.5.6 Error indications
Display Meaning Comments
Measurement not possible, Voltage > 20 V on the input, for example
Voltage present on network voltage not cut
measurement input
Measured value greater than Resistance exceeding the measurement
600 MΩ (at 500V) or range, lead cut or badly connected
300 MΩ(at 100V - 250 V)
Measured value below Activation of user alarm!
set LIMIT Short-circuit on line, possibly
N – PE bridges
Measurement not possible Wrong connection of instrument
test leads
Charge the battery – if this is not possible,
Measurement not possible, the charging fuse is perhaps defective
Battery too low see “Replacing the fuses”
5.6 RCD testing
The RCD-FI measurement function enables the correct working order of RCD’s to be checked. Nominal
fault currents I∆Nof 10 / 30 / 100 / 300 / 500 mA and “VAR” position of 6 mA to 1000 mA can be selected.
The fault voltage “UF”(at I∆N), the trip current “IA” and the trip duration “tA” can be measured.
Additionally, the test currents 2x I∆N, 5x I∆Nand 150/250 mA are also available.
When using the earth probe, the earth resistance “RA” can also be measured!
Without the earth probe, the loop resistance “RS”and the short-circuit current“Ik”can also be measured.
For all test currents, measurement of the fault voltage, loop resistance, short-circuit current and
earth resistance is possible at the same time as an RCD test, without tripping 30 mA RCD’s.
When measuring tripping time, for safety reasons the current is interrupted after 500 ms if the RCD
doesn’t trip.
To test the permitted fault voltage on old installations (65 V) with tripping, a self-adaptive measurement
procedure is used which, if the fault voltage increases, reduces the permitted tripping duration to 100
ms, in compliance with EN 61010.
If using the earth probe, parasite voltages of up to 70 V can be displayed and do not distort the
measurement.If the interference voltage exceeds 70V, measurement is not begun.The maximum earth
probe resistance tolerated is 15 kΩ.
NOTE: Unstable measurements caused by heavy disturbances in the mains supply can be reduced by
making a long press on the “TEST” button (available since Version 2.8)
5.6.1 Description of the function
After the test of voltages UL-PE and UN-PE , the current source is applied to the highest voltage in relation to
the PE.
First of all, the instrument circulates a current < 40% of I∆N, so as to calculate the fault voltage and the
loop resistance (ZSthen the fault voltage UF= ZSx I∆N) without tripping the RCD.
If the earth probe is used, the voltage of this probe is measured in a closed circuit and the fault voltage
and the earth resistance are calculated from this value.