Chauvin Arnoux C.A 6471 Earth and resistivity tester

287 000,00 € tax incl.
Chauvin Arnoux

EARTH MEASUREMENT WITH 3P METHOD

The 3P method is the traditional method using rods to measure the resistance of an existing earth connection. The C.A 6470N & C.A 6471 can also be used to measure the resistances of the auxiliary rods RS and RH, as well as any disturbance voltages. Suitable for all types of measurement environments, even the most difficult, this method guarantees measurement of auxiliary-rod resistances up to 100 k½ and disturbance voltages of 60 Vpeak.

EARTH MEASUREMENTS 4P AND SELECTIVE 4P EARTH MEASUREMENT

The 4P measurement method is particularly suitable for measuring very low earth resistances. If there are several resistances connected in parallel, it is possible to use the instrument with a clamp-on ammeter to carry out selective measurements, in order to avoid the effect of the parallel earth connections. This "selective 4P" measurement method saves considerable time because it is no longer necessary to disconnect the earth resistance before measuring it. In the event of a system with parallel earth connections, 2 clamp-on ammeters can be used with the C.A 6470N & C.A 6471 to provide accurate earth resistance measurements. The principle of this method involves placing 2 clamps around the earth conductor tested and connecting each of them to the instrument. One clamp injects a known signal (32 V / 1367 Hz) while the other clamp measures the current flowing in the loop. This method saves considerable time when earth testing because it is no longer necessary to set up auxiliary rods or disconnect the earth connections, which is often timeconsuming

MEASUREMENT OF EARTH COUPLING

To estimate the reciprocal influence of 2 normally unrelated earth resistances, you must calculate the coupling coefficient, which should be as low as possible. The operator takes 3 successive measurements (2 classic earth measurements using the classic 3P - R1 & R2 method, and 1 earth measurement using the 2P – R1-2 method. The instrument then automatically calculates the coupling resistance: Rc = (R1 +R2 –R1-2) / 2.

SOIL RESISTIVITY MEASUREMENT When it is possible to choose the position of the earth connection, resistivity measurements can be used to check the soil and determine where the earth resistance will be lowest (optimization of building costs). The C.A 6472 automatically calculates soil resistivity using the Wenner or Schlumberger methods as soon as the distances between the rods have been entered. The resistances of the rods RE, RES, RS and RH can also be measured.

Multi-function earth tester

  • Test ground resistance using the 2 clamp method (no auxiliary rods needed)
  • 2- and 4-Pole Bond Resistance/Continuity measurement (DC Resistance) with automatic polarity reversal
  • 3-Pole Fall-of-Potential measurement with manual or automatic frequency selection
  • 4-Pole Soil Resistivity measurement with automatic calculation of Rho (r) and user selection of the Wenner or Schlumberger test method
  • 3-Pole Earth Coupling measurement
  • Manual and Automatic frequency scan from 41 to 513Hz for optimum test accuracy in electrically noisy environments
  • Selectable test voltage of 16 or 32V up to 250mA of test current
  • Auto-off power management
  • Automatic recognition of all electrode connections and their resistance value
  • Stores up to 512 complete test results in internal memory
  • Optically isolated USB communication
  • Remote set up and operation of all measurements using DataView® software
  • Rechargeable NiMH batteries from wall charger or vehicle power
  • Rugged dustproof and rainproof field case – IP54 rated in closed position
  • Grounding standards IEC 61557 parts 4 and 5 compliant
  • Includes DataView® software for data storage, real-time display, analysis, report generation and system configuration

    Specifications

    Model 6471
    Electrical
    2 Clamp Measurement
    Range O.01 to 500Ω
    Resolution 0.01 to 1Ω
    Measurement Frequency Auto: 1367Hz
    Manual: 128Hz-1367Hz-1611Hz-1758Hz
    3-Point Measurement
    Range (Auto-Ranging) 0.09Ω to 99.9kΩ
    Resolution 0.01Ω to 100Ω
    Test Voltage Nominal 16 or 32VRMS user selectable
    Resistance Measurement Frequency 41 to 513Hz automatic or user selectable
    Test Current Up to 250mA
    Accuracy ±2% of Reading + 1ct @ 128Hz
    Soil Resistivity 4-Point Measurement
    Test Method Wenner or Schlumberger selectable with automatic calculation in Ω-meters, Ω-cm or Ω-feet
    Range (Auto-Ranging) 0.01 to 99.99kΩ; ? Max: 999kΩm
    Resolution 0.01 to 100Ω
    Test Voltage 16 or 32V user selectable
    Frequency From 41 to 128Hz selectable
    External Voltage Measurement
    Range (Auto-Ranging) 0.1 to 65.0Vac/dc – DC to 440Hz
    Accuracy ±2% of Reading + 1cts
    Resistance Measurement (Bond Testing)
    Measurement Type 2-Pole (with lead resistance compensation) or 4-Pole (Kelvin sensing) user selectable
    Range (Auto-Ranging) 2-Pole 0.01O to 99.9kΩ; 4-Pole 0.001O to 99.99kΩ
    Accuracy ±2% of Reading + 2cts
    Test Voltage 16Vdc (+, - or auto polarity)
    Test Current Up to 250mA max
    Data Storage
    Memory Capacity 512 test results
    Communication Optically Isolated USB
    Power Source 9.6V rechargeable battery pack
    Recharging Source 110/220 50/60Hz external charger with 18Vdc, 1.9A output or 12V vehicle power


    6470C 4-Point Ground Resistance Testers

    The Ground Resistance Tester Model 6470C is a portable measurement instrument designed to measure Ground Resistance with 2 clamps (no auxiliary rods), Bond/Connection Resistance (2-Pole and 4-Pole Kelvin sensing), Ground Resistance (3-Pole or 4-Pole), Ground Coupling Resistance, and Selective Ground Resistance, Soil Resistivity (Wenner or Schlumberger method). The Model 6470C measures from 0.01 to 99.99kO and is auto-ranging, automatically seeking out the optimum measurement range, test frequency and test current.

    Easy-to-use - Simply connect the leads, select the test mode, press Start and read the results. Up to 512 test results can be stored in internal memory for later recall to the display or downloaded to a PC via DataView® software.

    The Model 6470C is Cat IV rated to 50V and is over voltage protected to more than 250VAC against accidental connection to live circuits. The voltage is also displayed on screen. In the event of a system fault, the Model 6470C can withstand 250VAC.

    Additional features of the Model 6470C include a heavy-duty field case sealed against dust and water when closed (the test button is also sealed against the elements); manual and automatic test frequency selection from 41 to 513Hz; user selectable 3-Pole Fall of Potential or 4-Pole Soil Resistivity test methods and user selectable 2-Pole or 4-Pole Bond Resistance test method. The Ground Resistance Tester Model 6470C is rugged, easy-to-use and ideal for maintenance crews performing numerous tests. It exceeds mechanical and safety specifications for shock, vibration and drop tests per IEC standards. The adjustable test frequency provides for rejection of high levels of interference, allowing it to be used under difficult conditions such as high stray currents that affect accuracy.

    Specifications

    Model 6470C
    Electrical
    2 Clamp Measurement
    Range O.01 to 500Ω
    Resolution 0.01 to 1Ω
    Measurement Frequency Auto: 1367Hz
    Manual: 128Hz-1367Hz-1611Hz-1758Hz
    3-Point Measurement
    Range (Auto-Ranging) 0.09Ω to 99.9kΩ
    Resolution 0.01Ω to 100Ω
    Test Voltage Nominal 16 or 32VRMS user selectable
    Resistance Measurement Frequency 41 to 513Hz automatic or user selectable
    Test Current Up to 250mA
    Accuracy ±2% of Reading + 1ct @ 128Hz
    Soil Resistivity 4-Point Measurement
    Test Method Wenner or Schlumberger selectable with automatic calculation in Ω-meters, Ω-cm or Ω-feet
    Range (Auto-Ranging) 0.01 to 99.99kΩ; Max: 999kΩm
    Resolution 0.01 to 100Ω
    Test Voltage 16 or 32V user selectable
    Frequency From 41 to 128Hz selectable
    External Voltage Measurement
    Range (Auto-Ranging) 0.1 to 65.0Vac/dc – DC to 440Hz
    Accuracy ±2% of Reading + 1cts
    Resistance Measurement (Bond Testing)
    Measurement Type 2-Pole (with lead resistance compensation) or 4-Pole (Kelvin sensing) user selectable
    Range (Auto-Ranging) 2-Pole 0.01O to 99.9kΩ; 4-Pole 0.001O to 99.99kΩ
    Accuracy ±2% of Reading + 2cts
    Test Voltage 16Vdc (+, - or auto polarity)
    Test Current Up to 250mA max
    Data Storage
    Memory Capacity 512 test results
    Communication Optically Isolated USB
    Power Source 9.6V rechargeable battery pack
    Recharging Source 110/220 50/60Hz external charger with 18Vdc, 1.9A output or 12V vehicle power





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