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Chauvin Arnoux
CA6240 10A Micro-Ohmmeter

Chauvin Arnoux CA6240 is a compact Micro-Ohmmeter offering 4-wire measurement with a large measurement range, automatic current reversal, plus automatic & manual recording.

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3630.00 incl. VAT)
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Chauvin Arnoux CA6240 Micro-Ohmmeter - Wide Measurement Range

The Chauvin Arnoux CA6240 is contained in a tough IP53 “leak-proof” enclosure suitable for the most demanding measurement conditions, combining simple, safe and fast operation with highly accurate results at a selection of test currents from 10mA up to 10A. 

Suitable for deployment on-site, in the workshop or in the laboratory, the CA6240 is used for a variety of low resistance measurement applications. These include general bond testing, circuit breaker and switch contact resistance, earth continuity, weld quality, metallised surface condition and graphite electrode applications.

Ergonomic, lightweight and compact the CA6240 has a wide measurement range from 1µΩ to 400Ω, utilising a 4 wire Kelvin method to eliminate test lead and contact resistance, with results displayed on an easy to read large back-lit LCD.  Selectable automatic polarity reversal of the measurement current eliminates the effects of stray or induced interference voltages. 

In automatic measurement mode a test will commence as soon as continuity is established between the 2 measurement points, with consecutive tests automatically started by simply moving to the next test point and re-stabilising a connection. Each measurement result is stored in memory, without the need for any key presses, for later recall to the display or download to a PC utilising the included software.

The Chauvin Arnoux CA6240 is powered by internal rechargeable batteries and can perform approximately 850 individual 10A tests, or over 5000 10mA tests, on one charge. A rapid charging mode ensures the battery is able to be recharged to 90% of its capacity in 3 hours.

The CA6240 is protected against accidental connection to a live supply up to 500v and will prevent a test being accidentally performed in this situation.

World class quality and performance and 30% lighter than some equivalent competitor products!


Chauvin Arnoux CA6240 Key Features:

  • 4-wire measurement method
  • Automatic current reversal
  • Test current up to 10 A Q1 μΩ resolution
  • Automatic recording “on the fly” or manual recording
  • Measurement ranges from 400 µΩ to 400 Ω
  • Automatic power off
  • Storage: 100 measurements
  • Communication via USB optical link
  • Data export software
  • IP53 protection
  • Electrical safety: IEC 61010-1 CAT III 50 V
  • Compatible with the DataView software


NEW retractable 10 A KELVIN test probes - To make them easier to use and to permit new applications!  These are now available as accessories.

"Pistol" test probes

  • Handle dimensions 108 x 40 mm, test probe 154 x 30 mm, thickness 28 mm
  • Test probe diameter 2 mm
  • Test-probe spacing 3.5 mm
  • Cable length 3.15 metres
  • Spade lugs for Ø 4 to 6 mm
  • Safety connectors Ø 4 mm
  • Weight approx. 2 x 420 g

Kelvin test probe with rotation

  • Dimensions (L x W x H) 207 x 34 x 30 mm
  • Test-probe diameter 3 mm
  • Test-probe spacing 8 mm
  • Test-probe extension/retraction 10 mm
  • Cable length 3.15 metres
  • Spade lugs for Ø 4 to 6 mm
  • Safety connectors Ø 4 mm
  • Weight approx. 2 x 400 g
  • Resistance 2 x 50 mΩ max


What comes with the Chauvin Arnoux CA6240?

  • Chauvin Arnoux CA6240 Micro-Ohmmeter
  • Set of 2 x 10 A Kelvin clamps with 3 m cable
  • European 2P mains power cable
  • Data export software
  • Optical / USB communication cable
  • Shoulder bag 


Technical Specification for: Chauvin Arnoux CA6240 10A Micro-Ohmmeter

Product Downloads


Accessory Code Description Price (Ex VAT)
P01101794 Standard Leads - Pair Red and Black; 3m; 10A; Croc Clip £373.00 ADD