C.A 6503 - Measuring equipment CHAUVIN ARNOUX - Free user manual and instructions
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USER MANUAL C.A 6503 CHAUVIN ARNOUX
MEGOHMMETRE
MEGOHMMETER
MEGOHMMETER
MEGAOHMMETRI
MEGAOHMETRO
C.A 6503

FRANÇAIS
ENGLISH
DEUTCH
ITALIANO
ESPANOL
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
| ~ | AC – Alternating current |
| 回 | Instrument fully protected by double insulation. No connection to the protective earth is necessary. |
| 风 | 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.
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.
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 MΩ 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
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

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 600V_AC 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.

Fig. 1
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 between n the terminals of the instrument is 250V , 500V , or 1000VDC (no-load), depending on the setting of the switch.

Fig. 2
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.
English
3.2. OPERATION:
3.2.3. MΩ Ω measurement:

M measurement at 250V_DC
The measurement is made at a voltage of 250V_DC above 1M measured. Short-circuit current ≤ 5mA_DC
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 500V_DC
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 1000V_DC
The measurement is made at a voltage of 1000V_DC above 10M measured. Short-circuit current ≤ 5mA_DC
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).
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 600V_AC in a single range (input impedance: 100k ), switch set to V.
4. GENERAL CHARACTERISTICS:
Dimensions: 120mm× 120mm height 130mm
Mass: 1.05 ~kg .
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.
Characteristics in the reference domain (23^ ± 3^) :
| Ranges | Characteristics in the reference range |
| MΩ ± 2,5% of full scale | |
| Volt ~ | ± 3% of full scale |
| MΩ | Measurement voltage: 250V, 500V and 1000V |
| MΩ Short-circuit current ≤ 5mA | |
Variations in the domain of use: quantities.
| Ranges | Errors in the range of use (-10 to+ 45°C) |
| MΩ | +1% / 10°C |
| Volt ~ | +1.5% / 10°C |
| MΩ ± 5% | |
Overloads - protection:
MΩ 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.
English
6.2. CLEANING:
The CA6503 must be disconnected from any electrical installation.
To clean the housing, use a cloth moistened with soapy water. Wipe off with a damp cloth. Then dry rapidly with a dry cloth or forced air.
6.3. METROLOGICAL CHECK
Like all measuring and testing devices, the multimeter must be checked periodically.
This instrument should be checked at least once a year. For checks and calibrations, contact one of our accredited metrology laboratories (information and contact details available on request), at our Chauvin Arnoux subsidiary or the branch in your country.
6.4. REPAIR:
For all repairs before or after expiry of warranty, please return the device to your distributor.
7. TO ORDER
C.A 6503 Megohmmeter P01132504
Delivered with:
1 1.5m black angled / straight cord.
1 1.5m red angled / straight cord.
1 1.5m blue angled / straight cord.
1 Black alligator clip.
1 Red alligator clip.
1 Blue alligator clip.
1 Black probe tip.
1 user guide in 5 languages
1 carrying bag
SPARES:
Carrying bag .P01298006
Deutsch
Unit 1 Nelson Court - Flagship Square-Shaw Cross Business Park
DEWSBURY - West Yorkshire - WF12 7TH
Tel:01162878888-Fax:01628628099
MIDDLE EAST - Chauvin Arnoux Middle East
P.O. BOX 60-154 - 1241 2020 JAL EL DIB (Beirut) - LEBANON
Tel: (01) 89 04 25 - Fax: (01) 89 04 24
CHINA - Shanghai Pu-Jiang - Enerdis Instruments Co. Ltd
3F, 3rd Building - N° 381 Xiang De Road - 200081 SHANGHAI
Tel: +86 21 65 21 51 96 - Fax: +86 21 65 21 61 07
USA - Chauvin Arnoux Inc - d.b.a AEMC Instruments
200 Foxborough Blvd. - Foxborough - MA 02035
Tel: (508) 698-2115 - Fax: (508) 698-2118
http://www.chauvin-arnoux.com