GB - User’s manual C.
Thank you for purchasing a C.A. 6240 microhmmeter. To obtain the best service from your instrument: read this user manual carefully, comply with the precautions for use. WARNING, risk of DANGER! The operator must refer to this user’s manual whenever this danger symbol appears. Equipment protected by double insulation. Earth. The CE marking indicates conformity with European directives, in particular LVD and EMC.
Do not immerse the C.A 6240 microhmmeter in water. Use connection accessories which have an overvoltage category and service voltage greater than or equal to those of the measuring instrument (50 V Cat III). Use only accessories that comply with safety standards (IEC 61010-2-031). All troubleshooting and metrological checks must be performed by competent and accredited personnel. Attach one of the 5 specifications labels, with your appropriate language, on the inside of the lid.
CONTENTS 1. PRESENTATION........................................................................................................................................................................ 5 1.1. Functions of the instrument ............................................................................................................................................ 6 1.2. Delivery condition......................................................................................................................
1. PRESENTATION Transfer of data to PC Battery charge X02870 Protecting fuse Connection terminals Choice of range or SET-UP C1 P1 P2 C2 C.
1.1. FUNCTIONS OF THE INSTRUMENT The C.A 6240 microhmmeter is a portable measuring instrument intended for the measurement of very low resistance values. It is enclosed in a site case and powered by a rechargeable battery with a built-in charger.
2. BATTERY CHARGE OFF Charge OFF Charge Current battery capacity in %. Charging time: 3 h 30 Start by fully charging the battery before the first use. In the 10 A range, the battery life is approximately 1h20. It is therefore best to charge the battery before starting series of measurements. Charging must be done between 0 and 40°C. The battery life of the instrument depends on the range.
3. RESISTANCE MEASUREMENT 1) Connect the 2 cables to the 4 measurement terminals, then the 2 Kelvin clips to the object to be tested, which must not be live. C1 P1 P2 C2 SET-UP +I 400 Ω 10mA A 400 Ω 10mA 2) Set the switch to 400Ω - 10 mA. Ω +I 3) Start the measurement by pressing the START/STOP button. mA Ω 2nd SET-UP 400 Ω 10mA 40 Ω 10mA 4000m Ω 100mA 400m Ω 1A 40m Ω 1A 4000µ Ω 10A OFF Charge 4) Press the START/STOP button again to stop the measurement...
The energy accumulated in an inductive component when a measurement is made on it must be released. You must never in any circumstances touch or disconnect the measurement leads until you have stopped making the measurement and waited at least ten seconds for all of the energy in the item tested to be dissipated. Failure to observe this precaution may result in the production of an arc, potentially hazardous for both the instrument and the operator.
3.2. REPETITIVE MEASUREMENTS C1 P1 P2 C2 START/STOP +I A Ω +I A HOLD µ Ω Connect the clips to the first object to be measured. The measurement starts automatically. Withdraw the clips: the measurement stops and the result is displayed. Connect the clips to the second object to be measured. The measurement restarts automatically. And so on. After the last measurement, press the START/STOP button again. START/STOP 3.3. ERROR MESSAGES 3.3.1.
C1 > 20 V P1 If a voltage greater than 20 V is applied between terminals C1 and C2, the fuse on the front panel of the instrument will blow and must be replaced (see §7.2). +I A HOLD P2 Ω C2 3.3.2. RANGE OVERSHOOT SET-UP +I A > If the instrument indicates a range overshoot (> symbol), turn the switch to the next higher range and restart the measurement. Continue for as long as the range overshoot message is displayed.
4. STORAGE OF RESULTS Data storage is organised into objects (OBJ.), each of which can contain several tests (TEST). OBJ. corresponds to the object tested and each test corresponds to a measurement made on the object. The instrument can store 100 measurements. 4.1 STORING +I A HOLD µ Ω MEM Once the measurement is over, it can be recorded. Press the MEM key. +I OBJ. TEST MEM The instrument proposes the first free location in memory. If it is acceptable, execute a long press on the MEM key.
4.2. READ MEMORY It is necessary first of all to stop the measurement by pressing the START/STOP button. +I OBJ. To read all tests containing a record. MR MR To change objects. TEST µ Ω To exit from the read memory function. MR 4.3. ERASE MEMORY To erase a record (read memory or not): CLR +I OBJ. CLR +I > 2s TEST µ Ω CLR OBJ. TEST CLR Use the arrows to select the test to be erased. The complete erasure of the memory is described in section 5.1. 4.4.
MEM P +I OBJ. TEST HOLD To stop automatic recording, press the START/ STOP button. OBJ. TEST µ Ω START/STOP Automatic recording activated. MEM P +I At each new measurement, the test number is incremented and the measurement is recorded. +I A Ω START/STOP 4.6. TRANSFER OF DATA TO PC HX0056-Z X02870 First of all, install the driver of the USB/ serial optical adapter (HX0056-Z).
5. OTHER FUNCTIONS (SET-UP) SET-UP 400 Ω 10mA SET-UP 40 Ω 10mA 4000m Ω 100mA 400m Ω 1A 40m Ω 1A 4000µ Ω 10A OFF Charge 5.1. COMPLETE ERASURE OF MEMORY MEM MEM MEM >2s CLR >2s 5.2. PROGRAMMING THE TIME MEM >2s To change the minutes To change the hour >2s 5.3.
5.4. PROGRAMMING OF AUTOMATIC STOPPING TIME P P >2s To choose automatic powerdown select “ON”, if not, choose “OFF”. To adjust the On time: 5, 10, or 15 minutes. >2s 5.5. DISPLAYING THE INTERNAL PARAMETERS OF THE INSTRUMENT Configuration of the instrument >2s Serial number ° _ HOLD AVG 2nd Software version Date of last calibration 16 P COM +I I > < OBJ.
6. CHARACTERISTICS 6.1. REFERENCE CONDITIONS Quantities of influence Reference values Temperature 23 ± 3 °C Relative humidity 45 to 55 % RH Supply voltage 6 V ± 0,2 V External voltage present on the terminals of the resistance being tested zero Inductance of the resistance being tested zero Electric field zero Magnetic field < 40 A/m 6.2. CHARACTERISTICS OF THE RESISTANCE MEASUREMENTS There must be no voltage on the element to be measured.
6.5.
6.8. CHARACTERISTICS OF CONSTRUCTION Overall dimensions of the instruments (L x W x H): 273 x 247 x 176 mm Mass: approximately 4.5 kg IP 53 per NF EN 60529 IK 04 per NF EN 50102 6.9. CONFORMITY TO INTERNATIONAL STANDARDS Electrical safety as per EN 61010-1 Measurement according to EN 61557 parts 1 and 4. Safety level categories: measurement category III, 50V with respect to earth, 500V differential between terminals, and 300V cat II on the charger input 6.10.
7. MAINTENANCE Except for the fuse, the instrument contains no parts that can be replaced by personnel who have not been specially trained and accredited. Any unauthorized repair or replacement of a part by an “equivalent” may gravely impair safety. 7.1. RECHARGING THE BATTERY g Recharge the battery (see §2) The battery must be replaced by Manumesure or by a repairer approved by Chauvin Arnoux. Only fit the battery recommended by the manufacturer.
8. WARRANTY Except as otherwise stated, our warranty is valid for twelve months starting from the date on which the equipment was sold. Extract from our General Conditions of Sale provided on request.
© Chauvin Arnoux - All rights reserved and reproduction prohibited 692008C02 - Ed. 2 - 06/2016 FRANCE Chauvin Arnoux Group 190, rue Championnet 75876 PARIS Cedex 18 Tél : +33 1 44 85 44 85 Fax : +33 1 46 27 73 89 info@chauvin-arnoux.com www.chauvin-arnoux.com INTERNATIONAL Chauvin Arnoux Group Tél : +33 1 44 85 44 38 Fax : +33 1 46 27 95 69 Our international contacts www.chauvin-arnoux.
