Chauvin Arnoux CA6418 Earth Clamp

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  • Measures earth leakage current up to 20A, ideal for complying with BS7671:2018
  • Loop impedance measurement from 0.01Ω to 1200Ω
  • Oblong earth leakage clamp for measuring different sizes and shapes of earth bar

rrp £1,180.00

now £977.50 (Ex. VAT) £1,173.00 (Inc. VAT)

rrp £1,180.00

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  • Description

    Chauvin Arnoux CA6418 Earth Clamp

    The Chauvin Arnoux CA6418 Earth Clamp is a useful instrument for measuring earth leakage current in electrical installations - ideal for complying with regulation 531:3:2 of the 18th Edition Wiring Regulations.

    It is capable of measuring current from 0.5mA to 20A AC and also has a loop resistance measurement function that provides readings between 0.01Ω and 1200Ω. Current readings are accurate to ±2% and precise to as little as 50µA whilst loop resistance measurement has a best accuracy of ±1.5% and a best resolution of 1mΩ.

    One of the standout features of the Chauvin Arnoux CA6418 is the oblong clamp that is ideally suited to measuring earth leakage current in different earth bars. It is capable of clamping round 30mm x 40mm rectangle bars, 20mm x 55mm rectangular bars, and ø32mm cylindrical bars. It is also possible to clamp onto an earth bar at an angle in constricted settings.

    Further features of the Chauvin Arnoux CA6418 include a backlit digital screen and an internal memory with space for up to 300 readings which can be recalled to the screen with a time and date stamp. Data hold is available and readings are automatically frozen on screen when the clamp is open. Alarms can be set for Z and I with a buzzer alarm.

    The clamp is operated using a simple dial and push-button interface. Automatic calibration of the jaw gap is carried out and it is possible to recalibrate the instrument without returning the clamp to the factory.

    The Chauvin Arnoux CA6418 has a battery life for up to 2400 thirty-second measurements and is safety rated as Cat IV 100V and Cat III 150V. It is supplied with batteries, a wrist strap, user’s manual, verification certificate and a hard carry case. A reaully useful additional accessory is the earth clamp calibration loop that allows the user to check the clamp's accuracy at 198Ω, 49.5Ω, 22Ω, 12.4Ω, and 7.9Ω.

    Chauvin Arnoux part number: P01122018

    Key Features

    • Current range: 0.5mA to 20A AC
    • Current accuracy: ±2%
    • Current resolution: 50µA to 100mA
    • Loop impedance range: 0.01Ω to 1200Ω
    • Loop impedance accuracy: ±1.5% to ±20%
    • Loop impedance resolution: 1mΩ ro 50Ω
    • Oblong earth leakage clamp
    • Internal memory for 300 readings
    • Backlit digital screen
    • Automatic calibration feature
  • Specification

    Loop Impedance

    • Ranges: 0.010 to 0.099Ω / 0.10Ω to0.99Ω / 1 to 49.9 Ω / 50 to 149 Ω / 150 to 245 Ω / 250 to 440 Ω / 450 to 640 Ω 
    • Resolutions: 1 mΩ / 10 mΩ / 100 mΩ / 1Ω / 5Ω / 10 Ω / 10Ω / 50Ω
    • Accuracies: ± (1.5 %R* + 0.01 Ω) / ± (1.5 %R + 2 r) / ± (1.5 %R + 2 r) / ± (2.5 %R + 2 r) / ± (5 %R + 2 r) / ± (10 %R + 2 r) / ± (15 %R + 2 r) 
    • No-load voltage: ≤4.5mV to 2083Hz


    • Ranges: 0.5 to 9.995 mA / 10.00 to 99.90 mA / 100.0 to 299.0 mA / 0.300 to 2.990 A 
    • Resolution: 50µA / 100µA / 1mA / 10mA / 100mA
    • Accuracy: ± (2 %R + 200 μA) / ± (2 %R + r) / ± (2 %R + r) / ± (2 %R + r)


    • Alarms: Configurable for Z and I 
    • Buzzer: Active
    • HOLD: Manual or automatic PRE-Hold
    • Automatic power-off: Active / Inactive


    • Display: OLED 152 segments - Active area 48mm x 39mm 
    • Storage: 300 time/date-stamped measurements
    • Power supply: 4 x 1.5V LR6 AA alkaline batteries or 4 NiMH batteries
    • Battery life: 2400 x 30s measurements
    • Calibration: Automatic at start up
    • Ingress protection: 100V Cat IV, 150V Cat III
    • IEC 61010: IP40
    • Dimensions: 300mm x 106mm x 56mm
    • Weight: 1.2kg approx. including batteries
  • Supplied Accessories

    • Chauvin Arnoux CA6418 Earth Leakage Clamp
    • 1 x carrying case
    • 4 x 1.5 V batteries
    • 1 x wrist strap
    • 1 x CD-Rom containing the user’s manuals - 1 quick startup guide
    • 1 x multi-language safety datasheet
    • 1 x verification certificate
    • 1 x calibration loop
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