Chauvin Arnoux C.A 6550 User Manual
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Chauvin Arnoux C.A 6550 User Manual

Megohmmeters 10 kv and 15kv
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Megohmmeters 10 kV and 15kV
C.A 6550
C.A 6555

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Summary of Contents for Chauvin Arnoux C.A 6550

  • Page 1 GB - User’s manual C.A 6550 C.A 6555 Megohmmeters 10 kV and 15kV...
  • Page 2 The CE marking indicates conformity with European directives, in particular LVD and EMC. Chauvin Arnoux has adopted an Eco-Design approach in order to design this appliance. Analysis of the complete lifecycle 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.

  • Page 3: Table Of Contents

    CONTENTS 1. FIRST USE ....................................4 1.1. Delivery condition ................................4 1.2. Accessories ..................................4 1.3. Replacement parts ................................. 5 1.4. Specifications label ................................ 6 1.5. Charging the batteries ..............................6 1.6. Adjusting the brightness and contrast ........................... 7 1.7. Choice of language ................................ 8 1.8.

  • Page 4: First Use

    Do not modify the leads or accessories. Any non-compliant repairs can cause risks of electric shock or burns. A C.A 6550 or a C.A 6555 with a screen protection film and a rechargeable battery. Three crocodile clips (red, black, and blue).

  • Page 5: Replacement Parts

    „ Shielded safety lead (black), 8 metres long, with a high-voltage plug with rear pick-up at one end and a large crocodile clip at the other „ Safety lead (red), 8 metres long, with a high-voltage plug at one end and a large crocodile clip at the other „...

  • Page 6: Specifications Label

    1.4. SPECIFICATIONS LABEL Attach one of the 5 specifications labels, with your appropriate language, on the inside of the lid. 1.5. CHARGING THE BATTERIES When using the instrument for the first time, start by fully charging the batteries. Charging must be done at a temperature between 0 and 30°C.

  • Page 7: Adjusting The Brightness And Contrast

    Battery 1 Full 100% Charging time: 11.4 V 15 mA 55.1°C 02:34:41 Battery 2 Full 100% 11.4 V 15 mA 55.1°C between 6 and 10 hours, depending 02:34:24 on the initial charge condition. Following prolonged storage, the batteries may be completely discharged. In this case, the first charge may take longer. Charging when the instrument is in operation is also possible.

  • Page 8: Choice Of Language

    1.7. CHOICE OF LANGUAGE This choice is available only if the version of the electronic boards allows it. To enter the language selection menu, press the CONFIG key and hold it down while turning the switch to SET-UP. English SET-UP SET-UP Français ...

  • Page 9: Description Of The Instrument

    2. DESCRIPTION OF THE INSTRUMENT...

  • Page 10: Functions

    2.1. FUNCTIONS C.A 6550 and C.A 6555 megohmmeters are high-end portable measuring instruments intended for the measurement of very high electrical insulation and resistance values, mounted in a rugged site housing with a cover; they have graphic screens and can operate on battery or mains power.

  • Page 11: Keypad

    2.2.2. EXAMPLE OF DISPLAY DURING THE MEASUREMENT The measurement smoothing DF 20s ALARM I-LIM filtering is active, with a time 303.3 MΩ Stop at current limit. constant of 20 seconds. Value of the insulation resistance. 984 V 3.244 µA Current flowing between the Elapsed Time 00:00:48 terminals.

  • Page 12: Procedure

    3. PROCEDURE When they leave the factory, the C.A. 6550 and C.A. 6555 are configured so that they can be used without modifying the parameters. For most measurements, you simply choose the test voltage and press the START/STOP button. If you want to modify parameters, most of them can be configured using the CONFIG key, and also in SET-UP. The SET-UP function allows overall configuration of the instrument independently of which measurement functions are chosen.

  • Page 13: Ac/Dc Voltage Measurement

    3.2. AC/DC VOLTAGE MEASUREMENT Turning the switch to any insulation measurement position (U-FIXED, U-VAR, U-RAMP, or U-STEP) sets the instrument to AC/ DC voltage measurement. The voltage between the input terminals is measured at all times and indicated as RMS value on the display unit: Input Voltage.
  • Page 14 3.3.2. WITH A FIXED VOLTAGE Set the switch to U-FIXED The following screen appears. BURN SET-UP FIXED VOLTAGE 500 V U-STEP -- V 1000 V U-RAMP U-VAR. Input voltage 10 V AC U-FIXED U-FIXED Frequency 50.0 Hz Input current 24 pA Date 2011.05.23 Time 10:31 Use the ...
  • Page 15 3.3.4. WITH A VOLTAGE RAMP This test is based on the principle that an ideal insulation produces the same resistance whatever the test voltage applied. Any negative variation of the insulation resistance therefore means that the insulation is defective: the resistance of defective insulation decreases as the test voltage increases.
  • Page 16 Set the switch to U-STEP. The following screen appears. BURN SET-UP STEP FUNCTION Min. 50 V Max. 500 V U-STEP U-STEP U-RAMP Test Run Time 00:05:00 U-VAR. Input voltage 1 V AC U-FIXED Frequency 50.0 Hz Input current 24.6 nA Date 2011.05.24 Time 15:31 Use the ...
  • Page 17 „ High insulation For very high insulation values, connect the small blue high-voltage lead between the rear pick-up of the black lead and the G terminal of the instrument in order to avoid leakage current and capacitive current effects or to eliminate the influence of the surface leakage current.
  • Page 18 3.3.7. BEFORE THE MEASUREMENT It is possible to configure the measurement using the CONFIG key  If the U-FIXED or U-VAR. test voltages have been selected, it is possible to select a measurement configuration by pressing the CONFIG key (see §4.3): „...
  • Page 19 E-BRK It is possible to view the available numerical values by 995 MΩ pressing the DISPLAY key.  531 nA 528 V Set: 500 V Elapsed Time 00:01:12 DAR (30s/60s) 1.00 PI (1.0m/10m) Capacitance DISPLAY In the case of a step test voltage (10 steps at most) or ramp test voltage (3 steps), the progress of the steps is indicated. E-BRK 5.03 GΩ...
  • Page 20  When the instrument is configured for a manual stop, once the measurement obtained is stable, press the START/ STOP button again to stop the measurement. In the other cases (programmed duration: Timed Run, Timed Run + DD, DAR, PI, U-RAMP, or U-STEP), the measurement stops automatically at the end of the test. START/STOP At the end of the measurement, the instrument switches back to voltage measurement, but usually the result of the insulation resistance measurement remains displayed.
  • Page 21 In the case of a ramp or step measurement, the measurement result is displayed as follows: Test with programmed duration. E-BRK Value of the insulation resistance. 5.03 GΩ Current at the end of the measurement. 516 V 98.7 nA Value of the test voltage at the Duration of the measurement.

  • Page 22: Error Indications

    3.4. ERROR INDICATIONS The most common error in the case of an insulation measurement is the presence of a voltage on the terminals. The instrument can make the measurement if the peak value of this voltage is less than 0.4U or 1000 V maximum.
  • Page 23 Press the START/STOP button again BURN to stop the measurement. 502 MΩ  502 V 978 nA Elapsed Time 00:10:10 DAR (30s/60s) 2.64 PI (1.0m/10m) 1.05 Capacitance 320 nF START/STOP „ In automatic configuration (preferable) Press the CONFIG key. CONFIG ...

  • Page 24: Dd (Dielectric Discharge Index)

    3.5.2. INTERPRETATION OF THE RESULTS Condition of insulation PI < 1 DAR < 1,25 Poor or even dangerous 1 ≤ PI < 2 1,25 ≤ DAR < 1,6 2 ≤ PI < 4 Good 1,6 ≤ DAR 4 ≤ PI Excellent A capacitance in parallel to the insulation resistance extends the settling times of the measurements.
  • Page 25 Use the keys to select Manual Stop + DD or Timed Run + DD (manual or automatic measurement). CONFIG CONFIG Total Run Time Total Run Time 00:03:00 Manual Stop Manual Stop Manual Stop + DD Manual Stop + DD Timed Run (m:s) 2:00 Timed Run (m:s) 2:00...

  • Page 26: Capacitance Measurement

    3.6.2. INTERPRETATION OF THE RESULT Value of DD Quality insulation 7 < DD Very poor 4 < DD < 7 poor 2 < DD < 4 Borderline DD < 2 Good 3.7. CAPACITANCE MEASUREMENT The capacitance measurement is made automatically after the insulation measurement, and is displayed after the measurement has been stopped and the device tested has been discharged.

  • Page 27: Complementary Functions

    4. COMPLEMENTARY FUNCTIONS 4.1. TEMP KEY This function is accessible only when the measurement is over and only for U-VAR and U-FIXED. It is used to refer the measurement result to a temperature other than the one at which the measurement was made. This is because the temperature causes the resistance to vary according to a quasi exponential law.

  • Page 28: Alarm Key

    Detail concerning the calculation performed: The insulation resistance varies with the measurement temperature. This dependence can be approximated by an exponential function: Rc = K where Rc: insulation resistance referred to 40°C. insulation resistance measured at temperature T. coefficient defined as follows: = (1/2) ^ ((40 - T)/∆T) where ∆T: temperature difference at which the insulation resistance is halved.
  • Page 29 When you select Timed Run (test with programmed duration) or Timed Run + DD, you can set the duration of the measurement (m:s). CONFIG Total Run Time 00:02:00 Manual Stop Manual Stop + DD Timed Run (m:s) 2:00 To do this, use the   and  keys. Timed Run + DD DAR (s/s) 30/60...
  • Page 30 Stoppage of the test at a preset current (Break at I-limit) The measurement will be stopped when the current reaches the maximum value (Maximum Output Current) defined by the user (see below). This type of test is useful for testing varistors or other types of voltage limiter. The I-LIM symbol is displayed.
  • Page 31 The RANGE symbol is displayed. RANGE BURN FIXED VOLTAGE 1000 V 500 V 2500 V Input voltage 10 V AC Frequency 50.0 Hz Input current 24.6 nA Date 2011.05.23 Time 10:31 „ Perturbation of the signal (Disturbance Level) Use the  keys to set its value, from Low to High. The DH symbol is then displayed. FIXED VOLTAGE 1000 V 500 V...
  • Page 32 „ In the U-STEP mode: the programming of the step (Set Step Function). Use the  keys to go to Set Step Function; the instrument displays the voltage step values programming screen. This programming can also be done in SET-UP (see §5.4). 4.3.2.

  • Page 33: Display Key

    4.4. DISPLAY KEY This key is used to browse through the various accessible screens. 4.5. GRAPH KEY  During the measurement and at the end of each measurement, pressing the GRAPH key displays a graphical presentation of the measurement results. The first screen shows the insulation resistance versus time R(t) and the voltage versus time U(t).

  • Page 34: Filter Key

    Press the DISPLAY key to view the current vs. time curve. GRAPH 2.985 GΩ 167.8 nA 00:02:00  Axis of the current. 2.985 GΩ 167.8 nA 00:02:00 The minimum maximum Curve I(t). values of the current and resistance at DISPLAY the position Time axis.

  • Page 35: Help Key

     Successive presses on the FILTER key modify or remove the filter: no filter, „ DF 10: time constant 10 seconds, „ DF 20: time constant 20 seconds, „ „ DF 40: time constant 40 seconds, DF: automatic filter, adapts the filter time to the resistance result changes. „...

  • Page 36: Configuration (Set-Up)

    5. CONFIGURATION (SET-UP) This function is used to change the configuration of the instrument by directly accessing the parameters to be modified. Set the switch to SET-UP. The following screen appears. General Settings ET-UP SET-UP Set Default Parameter Buzzer Power Down U-STEP Baud rate 38400...

  • Page 37: General Parameters

    5.2. GENERAL PARAMETERS Buzzer: to set the audible level of beeps: 1, 2, 3, or Off (no sound). Power down: automatic switching off of the instrument: On (power off at the end of 5 minutes), Off (no power off). Baud rate: to set the data rate on the serial interface to 9600, 19200, 38400 or 57600 bauds. Date: to set the date in yyyy-mm-dd format.

  • Page 38: Adjustment Of The Test Voltages

    Test Type: to choose the type of test: Burning, Early-Break, or Break at I-Limit (see § 4.3.1). Maximum Output Current: to set the maximum output current, from 0.2 to 5mA for the Burning and Break at I-limit test types; it is fixed at 0.2 mA for the Early break test type. Maximum Output Voltage: to set the maximum output voltage.

  • Page 39: Adjustment Of The Alarm Thresholds

    Set Ramp Function 1, 2, and 3: in the case of a measurement with a ramped voltage, used to set the starting voltage, the slope of the ramp, and the final voltage. Pressing the  key opens the following screen: Step &...

  • Page 40: Memory Function

    6. MEMORY FUNCTION 6.1. RECORDING OF THE MEASUREMENTS It is possible to record each insulation measurement once it is over. It is not possible to record the voltage measurements. These measurements are recorded at addresses identified by an object number (OBJ) and a test number (TEST). An object can contain 99 tests.
  • Page 41 Press the MEM key one last time to record the The instrument confirms the storage. measurement.  The measurement is recorded with all its supporting information: the date, the time, the measurement mode, the duration of the measurement, the measurement configuration, the test voltage, the insulation resistance, the capacitance, the residual current, and possibly the DAR, the PI, the DD, the resistance referred to the reference temperature, etc.

  • Page 42: Reading Recorded Values

    6.2. READING RECORDED VALUES Set the switch to MR. The instrument shows an overview of the object number usage and the object number of the last used record, along with the lowest and highest test numbers it contains. SET-UP Object Object Tests 01 ..
  • Page 43 When the symbol indicates that the samples have been recorded, you can press the GRAPH key to view the curve. Obj. Test Date Time Fct. MEMORY 2011-05-27 10:43  02 02 500 V 5.02 GΩ 00:04:59  Step Function 500 V 5.02 GΩ...

  • Page 44: Erasing The Memory

    6.3. ERASING THE MEMORY Set the switch to MR. SET-UP U-STEP U-RAMP U-VAR. U-FIX 6.3.1. ERASING ONE RECORD Use the keys to select the record to be erased in Press the CONFIG key. the list of records in memory. The instrument requests confirmation of the deletion. Obj.

  • Page 45: List Of Coded Errors

    6.3.2. ERASING ALL RECORDS The instrument requests confirmation of the deletion. Select OK to confirm or CANCEL to cancel. Object MEMORY Object Tests P r e s s t h e ! WARNING ! 01 .. 08 CONFIG key.  All data sets will be cleared ! ...
  • Page 46 „ Fatal error messages: No operation is possible. Power off the device and power it back on. A repair is needed if the error recurs. Errors 01, 08, 09 In addition to error messages there are other indications for errors: „...

  • Page 47: Data Transfer Software

    7. DATA TRANSFER SOFTWARE DataView , the data transfer software supplied with the instrument, can be used to export the measurements and to present ® them in the form of a report. Set the switch to any position other than OFF. Start by installing the software using the CD The data rate must be 38,400 bauds for the instrument (see §5.2) supplied with the instrument.

  • Page 48: Specifications

    8. SPECIFICATIONS 8.1. REFERENCE CONDITIONS Influence quantities Reference values Temperature 23 ± 3°C Relative humidity 45 to 55% RH Supply voltage 9 to 12V Frequency range DC and 15.3 … 65Hz Capacitance in parallel on resistance 0µF Electric field null Magnetic field <40A/m The intrinsic uncertainty is the error specified for the reference conditions.
  • Page 49 „ Maximum current: ≤1mA from 40 to 999V 5 to 0.2mA from 1000 to 15000V. The user can adjust this current. „ Maximum acceptable peak AC voltage on the terminals during measurement: 0,4 U or 1000 V maximum. „ Short-circuit current: ≤5mA ±5%.
  • Page 50 „ Measurement of the DC voltage during the insulation test Input impedance: 3MW up to 1,600V and 300MW thereafter. Specified measurement 40.0 … 99.9 100 … 1500 1600 … 5100 5100 … 16000 range (V) Resolution 0.1V 1-2V 2-4V Intrinsic uncertainty ±1% „...
  • Page 51 1000V range 1200 1000 1,E-02 1,E-01 1,E+00 1,E+01 1,E+02 1,E+03 1,E+04 1,E+05 1,E+06 1,E+07 10 k 100 k 10 M 100 M 10 G 100 G 10 T 10 k 100 k 10 M 100 M 10 G 100 G 10 T 2500V range 3000...
  • Page 52 5000V range 6000 5000 4000 3000 2000 1000 1,E-02 1,E-01 1,E+00 1,E+01 1,E+02 1,E+03 1,E+04 1,E+05 1,E+06 1,E+07 10 k 10 k 100 k 100 k 10 M 10 M 100 M 100 M 10 G 10 G 100 G 100 G 10 T 10 T...
  • Page 53 15000V range 16000 14000 12000 10000 8000 6000 4000 2000 1,E-02 1,E-01 1,E+00 1,E+01 1,E+02 1,E+03 1,E+04 1,E+05 1,E+06 1,E+07 1,E+08 10 k 100 k 10 M 100 M 10 G 100 G 10 T 100 T 10 k 100 k 10 M 100 M 10 G...

  • Page 54: Power Supply

    8.3. POWER SUPPLY Power supply to the instrument is from two rechargeable 9.6V, 4Ah NiMH battery packs. Charging is carried out by connecting the instrument to mains, at a voltage of 90 to 260V and a frequency of 50-60Hz, with an ambient temperature of 0 to 30°C.

  • Page 55: Environmental Conditions

    8.3.4. LIFE BETWEEN CHARGES The mean battery life depends on the measurement and on how the device is used. Test voltage (V) 1 000 2 500 5 000 10 000 15 000 Voltmeter Battery life (h) How long your device can operate when the battery is fully charged depends on several factors: „...

  • Page 56: Compliance With International Standards

    (1): The DAR, PI and DD terms and the capacitance and leakage current measurements are included in the quantity “MW”. 8.8. INTRINSIC UNCERTAINTY AND OPERATING UNCERTAINTY C.A 6550 and C.A 6555 megohmmeters comply with standard IEC-61557, which requires that the operating uncertainty, called B, be less than 30%.

  • Page 57: Maintenance

    9.2. UPDATING OF THE INTERNAL SOFTWARE With a view to providing, at all times, the best possible service in terms of performance and technical upgrades, Chauvin Arnoux invites you to update the embedded software of the device by downloading the new version, available free of charge on our web site.

  • Page 58: List Of Parameters

    Current (if not Early- Break) Set-up, Config Maximum Output 0.2mA 0.2mA Current (if Early-Break) Set-up Maximum Output 40V ... 15000V C.A 6550: 10000 V user Voltage C.A 6555: 15000 V Set-up Adjustable Voltage 1 40V ... 15000V user Set-up Adjustable Voltage 2 40V ...
  • Page 59 Menu / screen Setting Range Default Reset to default by Set-up, Config Ramp Function 2 - 0:10 ... 99:19 (sum of 2:00 user Ramp Step Duration all 3 steps ) (m:s) Set-up, Config Ramp Function 2 - End 0:10 ... 99:19 (sum of 0:30 user Step Duration (m:s)

  • Page 60: Warranty

    10. 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. The warranty does not apply in the following cases: „...
  • Page 62 FRANCE INTERNATIONAL Chauvin Arnoux Group Chauvin Arnoux Group 190, rue Championnet Tél : +33 1 44 85 44 38 75876 PARIS Cedex 18 Fax : +33 1 46 27 95 69 Tél : +33 1 44 85 44 85 Fax : +33 1 46 27 73 89 Our international contacts info@chauvin-arnoux.com...

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