Chauvin Arnoux CA6240 Micro-Ohmmeter
High Accuracy 10 A Low Resistance Tester
The Chauvin Arnoux CA6240 is a rugged IP53 rated micro-ohmmeter designed to deliver fast, precise and repeatable low resistance measurements in industrial, workshop and laboratory environments. Built to withstand demanding field conditions, the CA6240 combines a wide measurement range with excellent accuracy thanks to its 4 wire Kelvin method, automatic current reversal and selectable test currents up to 10 A.
Engineers rely on the Chauvin Arnoux CA6240 for applications such as circuit breaker contact resistance testing, earth continuity verification, weld quality inspection, metallised surface assessment and low resistance measurements on inductive components. With its automatic measurement and recording functions, the instrument makes repetitive or high-volume testing significantly faster and more efficient.
Reliable Low Resistance Measurement Designed for Productivity
The CA6240 provides seven automatically selected ranges and covers measurements from micro-ohms to hundreds of ohms. It offers fine resolution down to 1 micro-ohm and supports test currents of 10 A, 1 A, 100 mA and 10 mA. This allows the instrument to adapt to a wide variety of components, from small connections to higher resistance assemblies.
The 4 wire measurement method eliminates errors caused by lead or contact resistance. Automatic polarity reversal cancels out interference voltages, which is especially important when testing in electrically noisy environments. A large backlit LCD ensures clear readings on site, and built-in safety features prevent measurements when disturbance voltages are present or if the instrument is accidentally connected to a live circuit up to 500 V.
Designed for Fast Workflow and Preventative Maintenance
The Chauvin Arnoux CA6240 features an automatic measurement mode that begins a test the moment the probes make contact. This is ideal for repetitive test scenarios. The automatic recording mode stores each reading without any key presses, allowing technicians to capture results continuously during inspection rounds.
Measurement data can be transferred to a PC using the optical USB communication link. Combined with the supplied software, this allows trend monitoring, reporting and long-term maintenance analysis. These features make the CA6240 a valuable tool for preventative maintenance engineers and quality assurance teams.
Key Features of the CA6240:
- 4-wire measurement method
- Measurement ranges from 5 µΩ to 400 Ω
- Test current up to 10 A
- Max. resolution 1 µΩ
- Automatic power off
- Power supply: NiMH rechargeable battery
- Storage: 100 measurements
- Communication via USB optical link
- Data export software
- IP53 protection
- Electrical safety: IEC 61010-1 CAT III 50 V
- Dimensions: 273 x 247 x 280 mm
- Weight: 5 kg
What Comes With the Chauvin Arnoux CA6240?
- Chauvin Arnoux CA6240 micro-ohmmeter
- Carrying bag
- Set of 2 x 10 A Kelvin clamps with 3 m cable
- European mains power lead
- USB optical communication cable
- Microhmview data export software
- Operating manuals in multiple languages
Optional Accessories
- Double test probe set
- Kelvin mini clamp set
- GB mains power lead
- Optical and RS communication cable
❓ Frequently Asked Questions (FAQ)
Q1: What is the measurement range of the CA6240?
A. The Chauvin Arnoux CA6240 covers a wide range from 5 micro-ohms to 399.9 ohms with automatic range selection for optimal accuracy.
Q2: Can the CA6240 measure inductive components?
A. Yes. The CA6240 supports measurements on inductive components and stabilises the test current to ensure accurate results.
Q3: Is the CA6240 safe to use around live circuits?
A. If the instrument detects a live voltage up to 500 V it automatically inhibits the measurement to protect both the user and the micro-ohmmeter.
Q4: How does the recording mode work?
A. In automatic recording mode the CA6240 captures each measurement as soon as the probes make contact with no button presses required. Stored data can be transferred to a PC for reporting and analysis.
Q5: What type of battery does the CA6240 use?
A. The CA6240 is powered by a rechargeable NiMH battery which supports extended operation during field and workshop testing.
Note: Be sure to check the official datasheet before buying, and the user manual before using any test equipment. Need training? Just reach out - we’re happy to help