Chauvin Arnoux 6503 User manual

C.A 6503 1
C.A 6503
MEGOHMMETRE
MEGOHMMETER
MEGOHMMETER
MEGAOHMMETRI
MEGAOHMETRO
Notice de fonctionnement
Bedienungsanleitung
Manual de instrucciones
FRAN AIS
E N G L I S H
D E U T C H
I T AL I A N O

English
C.A 6503 13
You have just purchased a CA 6503 megohmmeter, thank you for your
confidence.
For best results from your device:
read this user manual attentively,
observe the precautions for its use.
Meanings of the symbols used
Instrument fully protected by double insulation. No
connection to the protective earth is necessary.
Selective sorting of wastes for the recycling of
electrical and electronic equipment within the
European Union.
In conformity with directive WEEE 2002/96/EC: this
equipment must not be treated as household waste.
Danger. See explanations in this manual
Risk of electric shock
Definitions of the measurement categories:
Measurement category IV corresponds to measurements made at the
source of the low-voltage installation.
Measurement category III corresponds to measurements made in the
installation of the building.
Measurement category II corresponds to measurements made on
circuits directly connected to the low-voltage installation.
Measurement category I corresponds to measurements made on circuits
not directly connected to the network.

English
14 C.A 6503
PRECAUTIONS FOR USE
If this instrument is damaged or a part is missing, please contact the seller
immediately.
This instrument is protected against accidental voltages up to 600V with respect
to earth in measurement category II, 300V in category III.
Failure to observe the instructions or the precautions for use may compromise the
protection provided by the instrument.
Please refer to this manual for each danger symbol encountered.
To avoid an electric discharge, injury, or damage to this instrument, and make
sure that you are using the megohmmeter in a risk-free manner, follow the safety
recommendations listed below:
This instrument can be used indoors or out (IP52) in environments where
the degree of pollution does not exceed 2, at an altitude of less than
2000m, with voltages up to 600V (CAT II) or 300V (CAT III).
Never use on a network of which the voltage or overvoltage category
exceeds the stated values
Before each use, check the integrity of the housing and of the insulation
of the leads and accessories. Replace any damaged cords. Do not use
the instrument if it seems damaged.
Use leads and accessories satisfying safety standards (IEC 61010-031)
for voltages and overvoltage categories at least equal to those
mentioned.
The use of suitable personal protective equipment is strongly
recommended. Avoid working alone.
Resistance and insulation measurements must be made only on circuits
that are isolated and not live.
Following an insulation measurement, leave the measurement leads
connected for a few seconds before disconnecting in order to discharge
the circuit tested.
Disconnect the cords from the instrument before cleaning, changing the
fuse, or opening the housing.

English
C.A 6503 15
CONTENTS
1 PRESENTATION.............................................................................16
2 DESCRIPTION OF THE VARIOUS PARTS, CONTROLS, AND FUNCTIONS
16
3 USE AND CHARACTERISTICS:.....................................................17
3.1 RECOMMENDATIONS.............................................................17
3.2 OPERATION:............................................................................18
3.2.1 M measurement:.............................................................18
3.2.2 AC voltage measurement..................................................19
4 GENERAL CHARACTERISTICS: ...................................................20
5 WARRANTY ....................................................................................21
6 MAINTENANCE ..............................................................................21
6.1 STORAGE: ...............................................................................21
6.2 CLEANING: ..............................................................................22
6.3 METROLOGICAL CHECK........................................................22
6.4 REPAIR: ...................................................................................22
7 TO ORDER......................................................................................23

English
16 C.A 6503
1. PRESENTATION
The CA 6503 is an electrical measuring instrument intended for insulation
measurements (1 to 500M at 250 or 500VDC and 10 to 5000M at 1000VDC).
A voltage-present indicator serves to make sure that there is no AC voltage in the
circuit to be tested.
This instrument is ready for use at all times because it requires no operating
maintenance. A magneto generator provides the various measurement and
operating voltages.
2. DESCRIPTION OF THE VARIOUS PARTS,
CONTROLS, AND FUNCTIONS
Range switc
h; set back
to V after using
Physical guard used to
support the left hand when
operating the crank.
Red indicator lit:
multiply the reading by
10 to obtain the result
(on M scale)
Measurement terminals
Guard terminal
Black Blue Red
Green indicator lit: indicates
that magneto speed of
rotation is OK, i.e. that
there is a voltage of up to
1000VDC between the
terminals.
Retractable crank
Screw for adjustment of
the mechanical zero of the
galvanometer

English
C.A 6503 17
A red indicator (Fig. 2) on the left side of
the instrument indicates the automatic
change of range. When it is lit, multiply the
reading by 10 to obtain the result.
Measurement input terminals:
These
accept safety plugs 4mm in diameter.
Other indicators:
A green indicator (Fig. 1) on the right side
of the instrument indicates that the speed
of the magneto is correct. When it is lit, the
voltage betwee
n the terminals of the
instrument is 250V, 500V, or 1000VDC
(no-
load), depending on the setting of the
switch.
3. USE AND CHARACTERISTICS:
3.1. RECOMMENDATIONS
The needle must indicate 0 on the 600-scale when at rest; if not, adjust it
using the black screw in the centre (see picture above).
Do not connect the instrument to the terminals of a circuit of which the
voltage exceeds 600VAC or DC.
Before any resistance measurement, check that the circuit is not live (switch
set to 500V before connection).
After each insulation resistance measurement, let the circuit discharge
(needle on 0V; this takes a few seconds) before disconnecting the
instrument.

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18 C.A 6503
3.2. OPERATION:
3.2.3. M measurement:
M measurement at 250VDC:
The measurement is made at a voltage of 250VDC above 1M measured. Short-
circuit current 5mADC.
There is a change of reading coefficient for rising values: 50M (changes to X10
reading), and a change of reading coefficient for falling values: 11M (changes to
X1 reading).
M measurement at 500VDC :
The measurement is made at a voltage of 500VDC above 1M measured. Short-
circuit current 5mADC.
There is a change of reading coefficient for rising values: 50M (changes to X10
reading), and a change of reading coefficient for falling values: 11M (changes to
X1 reading).
M measurement at 1000VDC:
The measurement is made at a voltage of 1000VDC above 10M measured.
Short-circuit current 5mADC.
There is a change of reading coefficient for rising values: 500M (changes to X10
reading), and a change of reading coefficient for falling values: 110M (changes
to X1 reading).

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C.A 6503 19
To avoid interference by surface leakage currents when making an insulation
measurement at 1000V, it is best to establish a guard circuit (fig. 3) using the
guard terminal ("G").
3.2.4. AC voltage measurement
Fig. 3
The AC voltage measurement
is from 0 to 600VAC
in a single
range (input impedance:
100k ), switch set to V.

English
20 C.A 6503
4. GENERAL CHARACTERISTICS:
Dimensions: 120mm x 120mm, height 130mm.
Mass: 1.05kg.
Degree of protection by housing: IP54 with cover and IP52 without
cover as per IEC 60529 (Ed. 92)
Power supply: This instrument is supplied by a magneto generator
that provides the various measurement and operating voltages
(speed of rotation: approximately 140rpm).
The voltmeter is supplied by the measurement input and so there is
no need to operate the crank.
Ranges Characteristics in the reference range
M 2,5% of full scale
Volt 3% of full scale
MMeasurement voltage: 250V, 500V and 1000V
M Short-circuit current 5mA
Variations in the domain of use: quantities.
M
Volt
M 5%

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C.A 6503 21
Overloads - protection:
M ranges: 600VAC/DC max.
Compliance with international standards:
Electrical safety in accordance with IEC 61010-1 (Ed. 2 of 2001).
Electrical safety in accordance with IEC 61010-2-031 (Ed. 2 of 2002).
Measurement in accordance with IEC 61557 (Ed. 2 of 2007), parts 1 and
4
Rated maximum voltage: 600V
Rated characteristics: measurement category III, 300V, or measurement
category II, 600V with respect to earth,
degree of pollution 2.
Electromagnetic compatibility:
The instrument complies with EMC requirements as per
NF EN 61326-1 : 2006.
5. WARRANTY
Our warranty applies, except as otherwise expressly stipulated, for twelve
months counting from the date of availability of the equipment (extract from
our General Terms of Sale, communicated on request).
6. MAINTENANCE
6.1. STORAGE:
Snap the crank into the recess provided for this purpose; fit the protective
cover.
There is nothing that need be removed for prolonged storage.