Chauvin Arnoux C.A 6292 User manual

200A microhmmeter
GB - User’s manual
C.A 6292

2
WARNING, risk of DANGER! The operator must refer to these instructions whenever this danger symbol appears.
Information or useful tip. Earth.
Equipment protected by double insulation. USB connector.
Warning: hot surface.
The product is declared recyclable following an analysis of the life cycle in accordance with standard ISO 14040.
Chauvin Arnoux has adopted an Eco-Design approach in order to design this appliance. Analysis of the complete life-
cycle has enabled us to control and optimize the effects of the product on the environment. In particular this appliance
exceeds regulation requirements with respect to recycling and reuse.
The CE marking indicates conformity with European directives, in particular LVD and EMC.
The rubbish bin with a line through it indicates that, in the European Union, the product must undergo selective disposal
in compliance with Directive WEEE 2002/96/EC. This equipment must not be treated as household waste.
PRECAUTIONS FOR USE
This instrument is compliant with safety standard IEC 61010-2-030, and the leads are compliant with IEC 61010-031, for voltages
of 30V with respect to earth. Failure to observe the safety instructions may result in electric shock, re, explosion, and destruction
of the instrument and of the installations.
The operator and/or the responsible authority must carefully read and clearly understand the various precautions to be taken in
use. Sound knowledge and a keen awareness of electrical hazards are essential when using this instrument.
Do not use the instrument on networks of which the voltage exceeds those mentioned.
Never exceed the protection limits stated in the specications.
Observe the conditions of use, namely the temperature, the relative humidity, the altitude, the degree of pollution, and the place
of use.
Do not use the instrument if it seems to be damaged, incomplete, or poorly closed.
Before each use, check the condition of the insulation on the leads, housing, and accessories. Any item of which the insulation is
deteriorated (even partially) must be set aside for repair or scrapping.
Before using your instrument, check that it is perfectly dry. If it is wet, it must be thoroughly dried before it can be connected or used.
Use only the leads and accessories supplied.
When handling the leads, test probes, and crocodile clips, keep your ngers behind the physical guard.
Use personal protection equipment systematically.
All troubleshooting and metrological checks must be done by competent, accredited personnel.
Thank you for purchasing a C.A 6292 200A microhmmeter.
For best results from your instrument:
read these operating instructions carefully,
comply with the precautions for use.

3
CONTENTS
1. FIRST USE................................................................................................................................................................................ 4
1.1. Delivery condition ........................................................................................................................................................... 4
1.2. Accessories .................................................................................................................................................................... 4
1.3. Replacement parts ......................................................................................................................................................... 4
1.4. Choosing a language...................................................................................................................................................... 5
2. PRESENTATION OF THE INSTRUMENT ................................................................................................................................ 6
2.1. Functions of the instrument ............................................................................................................................................ 6
2.2. Display unit ..................................................................................................................................................................... 7
2.3. Keypad ........................................................................................................................................................................... 7
2.4. Knob ............................................................................................................................................................................... 7
3. SETTINGS OF THE INSTRUMENT.......................................................................................................................................... 8
3.1. Main menu...................................................................................................................................................................... 8
3.2. Choosing a language...................................................................................................................................................... 9
3.3. Setting the time and date................................................................................................................................................ 9
3.4. Contrast and brightness of the display unit .................................................................................................................. 10
3.5. Cooling system ..............................................................................................................................................................11
3.6. Other parameters ..........................................................................................................................................................11
4. USE ......................................................................................................................................................................................... 12
4.1. Precautions for use....................................................................................................................................................... 12
4.2. Connection ................................................................................................................................................................... 12
4.3. Main screen .................................................................................................................................................................. 14
4.4. Name of object ............................................................................................................................................................. 15
4.5. Test current................................................................................................................................................................... 15
4.6. Test duration ................................................................................................................................................................. 15
4.7. Resistance measurement ............................................................................................................................................ 16
4.8. Messages ..................................................................................................................................................................... 17
4.9. Disconnecting ............................................................................................................................................................... 17
5. RECORDING........................................................................................................................................................................... 18
5.1. Recording measurements ............................................................................................................................................ 18
5.2. Memory full ................................................................................................................................................................... 19
5.3. Retrieval from memory ................................................................................................................................................. 19
5.4. Clearing memory .......................................................................................................................................................... 20
5.5. Displaying memory usage ............................................................................................................................................ 21
6. DATAVIEW®SOFTWARE ....................................................................................................................................................... 22
7. TECHNICAL CHARACTERISTICS ........................................................................................................................................ 23
7.1. Reference conditions.................................................................................................................................................... 23
7.2. Electrical characteristics ............................................................................................................................................... 23
7.3. Memory......................................................................................................................................................................... 24
7.4. Environmental conditions ............................................................................................................................................. 24
7.5. Mechanical characteristics ........................................................................................................................................... 24
7.6. Compliance with international standards...................................................................................................................... 24
7.7. Electromagnetic compatibility (CEM)............................................................................................................................ 24
8. MAINTENANCE...................................................................................................................................................................... 25
8.1. Cleaning ....................................................................................................................................................................... 25
8.2. Replacing the fuse........................................................................................................................................................ 25
9. WARRANTY ........................................................................................................................................................................... 25

4
1. FIRST USE
1.1. DELIVERY CONDITION
1One 200A C.A 6292 microhmmeter with a protecting fuse.
2One carrying case containing the various leads and accessories.
3One mains power cord.
4Two Kelvin cords (one red and one black) 6m long terminated by clamps.
5One green lead 3m long terminated by a crocodile clip.
6One USB A/B cord 1.5m long.
7Two data transfer programs, DataView® and MOT (Micro-Ohmmeter Transfer), on CD-ROM.
8One user manual on CD-ROM (1 le per language).
9One multilingual getting started guide.
10 One multilingual safety data sheet.
1.2. ACCESSORIES
Set of two 15m Kelvin cords (red and black) terminated by clamps
MR 6292 current clamp
1.3. REPLACEMENT PARTS
Set of two Kelvin cords (one red and one black) 6m long terminated by clamps
One green cord 3m long terminated by a crocodile clip
Set of ve thermal fuses (15A, 250V, 5x20mm)
Carrying bag
USB A/B cord 1.5m long
For accessories and spares, visit our web site:
www.chauvin-arnoux.com
➀➁➂
➅
➉
➇
➃
➄
➆➈
Rx
C.A 6292
MICRO-OHMMETER

5
1.4. CHOOSING A LANGUAGE
Connect the power cord to the instrument and to a power outlet, then switch the instrument on by setting the switch to I.
Rx
C.A 6292
MICRO-OHMMETER
> 100 Vac
< 240 Vac
50 / 60 Hz

The screen lights and the
instrument runs a self-test.



=== MENU ===
SETUP TEST
LANGUAGE
MEMORY
=== MENU ===
SETUP TEST
LANGUAGE
MEMORY
=== LANGUAGE ===
• ENGLISH
FRANCAIS
ITALIANO

6
MAX
Rx
C.A 6292
MICRO-OHMMETER
2. PRESENTATION OF THE INSTRUMENT
Socket for connection
of the power cord.
Fan.
Selection and ad-
justment knob.
Keypad with 19 keys.
4 connection
terminals.
5-point XLR connector for
clamp-on ammeter (option).
USB connector.
On/Off switch.
Earth terminal.
Air vents for ventilation. Protecting fuse.
2.1. FUNCTIONS OF THE INSTRUMENT
The C.A 6292 microhmmeter is a portable measuring instrument intended for the measurement of very low resistance values. It is
enclosed in a eld housing and uses mains power.
The C.A 6292 is used to accurately measure very low contact resistances on circuit-breakers, switches, conducting bars, etc., with
test currents of up to 200A.
The measurements can be recorded and uploaded to a computer via a USB interface.
A ventilation system prevents overheating of the instrument.
This instrument is rugged and can be carried by a single individual.
LCD display unit.

7
The main characteristics of this instrument are:
Cooling system that makes it possible to perform several tests in succession.
Choice of test currents: 50, 100, 150, 200A, or manual between 20 and 200A.
Accurate measurement of low resistances.
Measurement of resistances between 0.1µΩand 1Ω.
Resolution 0.1µΩ.
Measurements may be normal or BSG (with both two sides of the object grounded).
Display available in 5 languages (English, French, Italian, Spanish, and German).
Test duration programmable between 5 and 120 seconds; unlimited with currents ≤100A.
Retrieval of recorded measurements on the display unit.
USB communication interface.
Direct printing using DataView® software and a PC.
Possibility of conguring the instrument and the measurements from a PC via DataView®.
Rugged housing, moderately heavy and water- and dust-tight.
The main applications of this instrument are:
Measurement of the contact resistances of switches;
Measurement of the contact resistances of circuit-breakers;
Measurement of the resistances of bar sets;
Measurement of the ground continuity of airframes;
Measurement of the ground continuity of rails;
Measurement of the ground continuity of oil pipelines.
2.2. DISPLAY UNIT
The LCD display unit is backlit. It can display four lines of 20 characters.
2.3. KEYPAD
The alphanumeric keypad is used to assign names to objects (groups of tests) and to enter the date and time.
The function keys are used to choose among several conguration parameters.
CAPS LOCK: When activated (green indicator lit above the key), the letters will be upper-case. When it is not activated, the
letters will be lower-case.
NUM LOCK: When activated (green indicator lit above the key), the keypad will be numerical. When it is not activated, the
keypad will be alphabetical.
MENU: To display the main menu, from which you can congure the instrument and the measurements.
DEL: To delete.
SAVE: To record the conguration and move up one menu level.
ESC: To cancel and move up one menu level.
MODE: To toggle between the Normal and BSG (both sides grounded) operating modes.
START: To start the measurement.
STOP: To stop the measurement.
2.4. KNOB
The knob has two functions:
Adjustment of the measurement current;
Navigating in the menu and selecting options.
When the main screen is displayed, pressing the knob has the same effect as pressing the MENU key.
In a menu, the knob is turned to
browse in the list of options.
In a menu, pressing the knob validates the
selected option; it has the same effect as
pressing the SAVE key.
In a menu, a long press on the knob has the
same effect as pressing the ESC key.

=


> 2s
=

During a measurement in manual mode, it can be pressed to set the test current.

8
3. SETTINGS OF THE INSTRUMENT
3.1. MAIN MENU

Press the MENU key to enter the settings menu or return to the main screen.
Turn the knob clockwise to move up (or anticlockwise to move down) in the list of options.


> 2s
When the desired option is selected, validate it by pressing the knob.

Press the knob or the SAVE key to record a setting.
Press the knob and hold it down, or press the ESC key, to cancel.
At any time while browsing, pressing the MENU key returns you directly to the main menu.
The various parameters of the main menu are:
SETUP TEST
Edit Record Name
Test current
Test duration
Return
LANGUAGE
English
Français
Italiano
Espanol
Deutsch

or
or


9
MEMORY
Retrieve
Clear all
Usage
Return
SETTINGS
Date format
MM/DD/YY
DD/MM/YY
Time format
12 H
24 H
Set date
Set time
Auto save
Off
On
Fan
Auto
On
Display unit
Brightness
Contrast
Return
System info
Return
The instrument can also be congured using DataView® software (see §6).
3.2. CHOOSING A LANGUAGE
(See §1.4).
3.3. SETTING THE TIME AND DATE

=== MENU ===
SETUP TEST
LANGUAGE
MEMORY
=== MENU ===
LANGUAGE
MEMORY
SETTINGS

=== SETTINGS MENU ===
DATE FORMAT
TIME FORMAT
DATE

=== DATE FORMAT ===
• MM/DD/YY
DD/MM/YY
Validate your selection by
pressing the knob or the
SAVE key.

=== SETTINGS MENU ===
DATE FORMAT
TIME FORMAT
DATE

10
Use the numerical keypad to enter the time. Then validate by pressing the knob.
If there is any error, you can press the ESC key to return to the SETTINGS menu without changing the present settings.
3.4. CONTRAST AND BRIGHTNESS OF THE DISPLAY UNIT


=== SETTINGS MENU ===
DATE FORMAT
TIME FORMAT
DATE
=== SETTINGS MENU ===
DATE FORMAT
TIME FORMAT
DATE


=== DATE ===
24/02/2015
Use the numerical keypad
to enter the current date.
Then validate by pressing
SAVE.
=== SETTINGS MENU ===
DATE FORMAT
TIME FORMAT
DATE
=== SETTINGS MENU ===
TIME FORMAT
DATE
SET TIME
=== SET TIME ===
10:36


=== MENU ===
SETUP TEST
LANGUAGE
MEMORY
=== MENU ===
LANGUAGE
MEMORY
SETTINGS
=== SETTINGS MENU ===
DATE FORMAT
TIME FORMAT
DATE
=== SETTINGS MENU ===
AUTO SAVE
FAN
DISPLAY

=== SETTINGS MENU ===
DATE FORMAT
TIME FORMAT
DATE
=== TIME FORMAT ===
• 12H
24H

11
3.5. COOLING SYSTEM
The C.A 6292 has a cooling system that increases the number of measurements you can make in succession without overheating
the instrument.
The cooling system includes air vents on the front panel of the instrument, a lter to keep dust from getting into the instrument,
and a fan to exhaust the hot air.
You can choose between:
operation of the fan only when the internal temperature is too high (AUTO)
or continuous operation of the fan (ON)

=== DISPLAY ===
BACKLIGHT
CONTRAST
RETURN

=== BACKLIGHT ===
MIN▒▒▒▒▒▒▒-------MAX
Adjust the brightness to suit
you.


=== DISPLAY ===
BACKLIGHT
CONTRAST
RETURN

=== CONTRAST ===
MIN ▒▒▒▒▒▒▒▒▒----MAX
=== DISPLAY ===
BACKLIGHT
CONTRAST
RETURN
=== MENU ===
LANGUAGE
MEMORY
SETTINGS
=== SETTINGS MENU ===
SET TIME
AUTO SAVE
FAN
3.6. OTHER PARAMETERS
The other parameters are explained in §§4 and 5.
=== FAN ===
• AUTO
ON
Adjust the contrast to suit you.

12
4. USE
The instrument must be used in accordance with safety procedures and the rules for use near systems at high voltages.
The voltages and currents generated can be dangerous.
4.1. PRECAUTIONS FOR USE
The instrument must be earthed via the earthing contact of the power cord.
Use only the cords and leads provided with the instrument.
During a measurement of the contacts of a circuit-breaker, the contacts must be closed and earthed. The part earthed must
be connected to the C- terminal.
Check that there is no voltage on the measurement terminals or the earthing contact.
High temperatures can be reached on the current terminals.
Never connect or disconnect the cables during a measurement. Stop the measurement rst.
The instrument must never be used in an explosive environment (like poorly ventilated battery storage rooms).
4.2. CONNECTION
The instrument uses the four-wire measurement method based on Kelvin’s principle to eliminate errors due to the resistances of
the test leads and to the contact resistances. This makes the measurements very accurate.
4.2.1. NORMAL MEASUREMENT
Use the cord provided to connect the instrument to mains.
Check that the device to be tested is not live.
Before switching the instrument on, connect the test leads to the device to be tested and to the terminals of the instrument.
Connect the current leads to the C+ and C- terminals and the voltage leads to the P+ and P- terminals.
Tighten the terminals well to reduce the contact resistances and limit heating. Also tighten the clamps well. Make sure that
the leads are correctly uncoiled and do not form loops.
Rx
C.A 6292
MICRO-OHMMETER
> 100 Vac
< 240 Vac
50 / 60 Hz

13

BAR 12
NORMAL (150A 60S)
MENU
02/03/2015 10:20
Rx
C.A 6292
MICRO-OHMMETER
> 100 Vac
< 240 Vac
50 / 60 Hz
Switch the instrument on by setting the switch to I.
Press the MODE key to dene the NORMAL mode.

14
4.2.2. BSG (BOTH SIDES GROUNDED) MEASUREMENT
The optional MR6292 current clamp is necessary for this measurement (see §1.2).
As for a normal measurement, connect the instrument to mains.
Check that the device to be tested is not live.
Before switching the instrument on, connect the test leads to the device to be tested and to the terminals of the instrument.
Connect the current leads to the C+ and C- terminals and the voltage leads to the P+ and P- terminals.
Add the earth connections. Both sides of the object to be tested must be grounded. The earthing contact of the instrument must
also be grounded, using the crocodile clip.
Connect the current clamp to the instrument and to one of the two earth connections. It measures the current shunted to earth
and so eliminates one possible source of measurement error.
Rx
C.A 6292
MICRO-OHMMETER
> 100 Vac
< 240 Vac
50 / 60 Hz
Tighten the terminals well to reduce the contact resistances and limit heating. Also tighten the clamps well. Make sure that
the leads are correctly uncoiled and do no form loops.
Switch the instrument on by setting the switch to I.
Press the MODE key to dene the BSG mode.
NAME OF OBJECT
NORMAL (100 A---S)
MENU
02/03/2015 10:20

8471 CIRCUIT-BREAKER
BSG (200A 90S)
MENU
02/03/2015 10:20
4.3. MAIN SCREEN
The main screen displays the parameters of the test in progress:
the name of the object,
the test mode,
the test current,
the test duration
the date and time.
You must then dene the various settings using the MENU key.

15
4.4. NAME OF OBJECT
The object name is used to retrieve measurements stored under the name.


=== MENU ===
SETUP TEST
LANGUAGE
MEMORY
=== SETUP TEST ===
EDIT RECORD NAME
TEST CURRENT
TEST DURATION
To change the object name, press the DEL key to erase the characters, then use the alphanumeric keypad to enter a new name
up to 20 characters long.
Press the SAVE key to save or ESC to cancel.
4.5. TEST CURRENT


=== MENU ===
SETUP TEST
LANGUAGE
MEMORY
=== SETUP TEST ===
EDIT RECORD NAME
TEST CURRENT
TEST DURATION
The available test currents are: 50, 100, 150, 200A, or MANUAL.
When you select MANUAL, you adjust the test current during the measurement by turning the knob.
Press the SAVE key to save or ESC to cancel.
During a test with a preset current, it is also possible to change the current during the measurement. To do this, press the knob to
activate the MANUAL mode, then turn it to change the current. The current adjustment step depends on the current.
Note that if the test current becomes greater than 100A, the maximum test duration will be reduced to 120s.
At the end of the test, the preset current is restored.
4.6. TEST DURATION


=== MENU ===
SETUP TEST
LANGUAGE
MEMORY
=== SETUP TEST ===
EDIT RECORD NAME
TEST CURRENT
TEST DURATION
If you choose TIMED, program a test duration between 5 and 120 seconds using either the numerical keypad or the knob.
If you choose UNLIMITED, there is no longer any limit on the duration of the test, but the test current must be less than or equal
to 100A. The instrument displays - - -.
Press the SAVE key to save or ESC to cancel.

=== TEST DURATION ===
• TIMED
UNLIMITED

16
4.7. RESISTANCE MEASUREMENT
Once the instrument is connected and the measurement has been congured, you can make a measurement.

STARTING OF TEST
BAR 12
NUMBER: 0001
In normal mode
R=103.6µΩ
I=150A
DURATION: 015/060s
02/03/2015 10:20

To stop a test of unlimited duration, or a timed test before
its normal end.
In BSG mode
R=284.7µΩ
It=192A Ig=8.0A
DURATION: 020/090s
02/03/2015 10:20
It is the current in the resistance to be measured.
Ig is the current shunted to earth, measured by the clamp.
At the end of the measurement, if you chose automatic save (see §5.1), when the measurement is terminated the instrument
records it. If you stop the measurement by pressing the STOP key, there is no automatic save.
R=103.6µΩ
I=150A
TEST OVER
SAVED! 90% FREE MEM

To change the current during the measurement:
R=103.6µΩ
I=150A
TEST OVER
02/03/2015 10:20

The C.A 6292 has a lter to eliminate 50 or 60Hz noise on the object to be measured because of induction by high-voltage
substations.
Press the ESC key to exit from the measurement and return to the menu.

17
4.8. MESSAGES
The following messages may be displayed during the measurements:
TEST OVER: Indicates that the measurement has been successfully completed.
LOW CURRENT: Indicates that the current is too low (<20A) to measure the resistance.
OVERRANGE: Indicates that the resistance is >1Ω.
TOO HOT: Indicates that the instrument has reached its internal temperature limit.
PROTECTION ACTIVATED: Indicates that the instrument has aborted the measurement because of a problem. Check the con-
nections, the power supply, and the earthing.
VOLTAGE DETECTED: Indicates that the instrument has detected a voltage greater than 20V on the input terminals and that
measurement is impossible. Check the connections and the earthing.

When a message ashes, press the ESC key to return to the main screen.
4.9. DISCONNECTING
At the end of the measurement, switch the instrument off, then disconnect the measurement leads and power cord.

18
5. RECORDING
The C.A 6292 can record between 1,600 and 8,000 measurements, depending on how they are recorded.
If a new object is created for each measurement, there will be only 1,600 records. But if the name of the object is never changed,
there will be 8,000.
5.1. RECORDING MEASUREMENTS

To record a measurement result, press the SAVE key during or at the end of the measurement.
The measurement is recorded with all of its information: name of object, test number, resistance, test current, test
duration, date and time.
To record all measurements (when they are terminated without error), activate automatic recording.



=== MENU ===
SETUP TEST
LANGUAGE
MEMORY
=== MENU ===
LANGUAGE
MEMORY
SETTINGS
=== SETTINGS MENU ===
DATE FORMAT
TIME FORMAT
DATE

=== SETTINGS MENU ===
DATE
SET TIME
AUTO SAVE
=== AUTO SAVE ===
OFF
• ON
A message is displayed at the bottom of the screen when a measurement is recorded. It indicates the percentage of memory free:
R=33.1µΩ
I=10A
TEST OVER
SAVED! 73% FREE MEM

19
You must then delete some objects or measurements to be able to record others.
5.3. RETRIEVAL FROM MEMORY
5.2. MEMORY FULL
When the memory is full and you want to record another measurement, the instrument reports:
R=33.1μΩ
I=10A
TEST OVER
MEMORY FULL





=== MENU ===
SETUP TEST
LANGUAGE
MEMORY
=== MENU ===
SETUP TEST
LANGUAGE
MEMORY
=== MEMORY ===
RECALL
CLEAR ALL
USAGE
If the memory is empty, the following message is displayed:
NO DATA IN MEMORY!

Otherwise, it is the last measurement recorded that is displayed. To go from one object to another, turn the knob. To select an
object, press the knob.
BAR 12
NUMBER OF TESTS: 003
LAST TEST: 02/03/15
<PREVIOUS NEXT>
For go from one measurement to another in the object, turn the knob. To select a measurement, press the knob.
REGISTER: 005
02/03/15 10:20
MEASUREMENTS: 003
<PREVIOUS NEXT>
102.7µΩ
I=100A
DURATION: 015/015s
<01/03>
This measurement contains 3 results. To scroll them, use the knob.
To exit, press the ESC key.

20
5.4. CLEARING MEMORY
5.4.1. DELETING A MEASUREMENT
Proceed as for a retrieval from memory, but when you reach the measurement to be deleted, press the DEL key.


DELETE THE RECORD.
CONFIRM? RECORD DELETED
Or press the ESC key to cancel.
5.4.2. DELETING AN OBJECT
Proceed as for a memory recall, but when you reach the object to be deleted, press the DEL key.
DELETE OBJECT
CONFIRM? OBJECT DELETED
Or press the ESC key to cancel.
5.4.3. CLEARING ALL MEMORY




=== MENU ===
SETUP TEST
LANGUAGE
MEMORY
=== MENU ===
SETUP TEST
LANGUAGE
MEMORY
=== MEMORY ===
RECALL
CLEAR ALL
USAGE
CLEAR MEMORY!
CONFIRM?
WILL NOT BE ABLE
TO RECOVER!


PLEASE ENTER THE FOLLOW-
ING SECURITY CODE:
(0842)
The instrument asks you to type a security code on the
alphanumeric keypad. This is in order to avoid clearing the
memory by mistake.
Then validate by pressing the knob.
CLEAR ALL At any time, you can press the ESC key to cancel.
