Chauvin Arnoux CA6255 Precision Microhmmeter with 4-Wire Measurement and Kelvin Clamps

Chauvin Arnoux CA6255 Precision Microhmmeter with 4-Wire Measurement and Kelvin Clamps

Chauvin Arnoux

£4,870.00 / £5,844.00 incl VAT

⚡ Wide Measurement Range: Measure resistance from 0 to 2500Ω with a maximum resolution of 0.1µΩ for detailed and accurate readings.

⚡ Adjustable Test Currents: Choose from multiple ranges with adjustable test currents from 10A to 1mA to suit various testing needs.

⚡ Extensive Data Storage: Save up to 1500 readings in the internal memory, conveniently sorted under object and test indices for organized data management.

⚡ Advanced Compensation Features: Includes temperature and stray voltage compensation using a Pt100 probe for accurate measurements under varying conditions.

⚡ Versatile Measurement Modes: Three measurement modes (non-inductive, inductive, and non-inductive with auto trigger) cater to specific testing requirements, such as resistors, inductive components, and production components.

Available on back-order

Free Mainland GB Delivery on orders over £150 Fast Dispatch from our UK Warehouse Price Match Available on Many Products Need Advice? Call 01945 738112
SKU: CHA-CA6255 Category: Brand:

Description

Chauvin Arnoux CA6255, 10A Microhmmeter c/w 2m Kelvin Clamp Cables 

Product Description:

The Chauvin Arnoux CA6255 Precision Micro Ohmmeter is a high-accuracy instrument designed to measure low resistance with extreme precision. Ideal for electrical professionals, this micro ohmmeter offers resistance measurement capabilities ranging from 0 to 2500Ω and a maximum resolution of 0.1µΩ, ensuring highly accurate results. It features adjustable test currents from 10A to 1mA, making it adaptable to a wide variety of testing applications. The built-in memory allows storage of up to 1500 readings, which can be easily retrieved and organized under different test indices. Additionally, the CA6255 incorporates advanced temperature and stray voltage compensation through a Pt100 probe for reliable performance in varying environmental conditions. With versatile measurement modes, including non-inductive, inductive, and non-inductive with auto trigger, it is designed to meet the diverse needs of electrical and industrial testing.

Key Features:

  • Resistance measurement range of 0 to 2500Ω with a resolution down to 0.1µΩ.
  • Adjustable test currents from 10A to 1mA for flexible testing.
  • Internal memory stores up to 1500 readings, sorted by object and test index.
  • Pt100 probe for temperature compensation and stray voltage compensation, ensuring accurate readings in varied conditions.
  • Three measurement modes: non-inductive, inductive, and non-inductive with auto trigger, catering to different types of components.
  • Basic accuracy of ±0.05% + 1µΩ using the four-wire measurement method with current reversal for high precision.
  • User-friendly interface with a large, backlit LCD display for easy operation in all lighting conditions.
  • Audible alarms for high and low threshold settings for safety and convenience.
  • Leakproof and robust design rated to IP53 and Cat III 50V, offering durability in demanding work environments.
  • RS-232 connectivity for downloading data to a PC and performing advanced analysis with optional DataView software.

What’s Included:

  • Chauvin Arnoux CA6255 Micro Ohmmeter
  • 1 set of 3m cables terminated by Kelvin clamps
  • Euro mains power lead (2m long)
  • User manuals (available in 9 languages)
  • Simplified user guides (available in 9 languages)
  • MOT (Micro-Ohmmeter Transfer) data transfer software on CD-ROM
  • RS232 communication cable

Comparison of Digital Low Resistance Ohmmeters

FeatureMegger DLRO10Megger DLRO10XChauvin Arnoux CA6240Megger DLRO10HDMegger DLRO10HDXChauvin Arnoux CA6255
Resistance Range0.1 µΩ to 2,000 Ω0.1 µΩ to 2,000 Ω5 µΩ to 400 Ω0.1 µΩ to 2,000 Ω0.1 µΩ to 2,000 Ω1 µΩ to 2,500 Ω
Test CurrentUp to 10 AUp to 10 AUp to 10 AUp to 10 AUp to 10 AUp to 10 A (3 ranges)
Test ModesManual, Auto, Continuous, InductiveManual, Auto, Continuous, Inductive, UnidirectionalManual, AutomaticManual, Auto, Continuous, InductiveManual, Auto, Continuous, InductiveInductive, Non-Inductive, Non-Inductive w/ auto trigger
Measurement ControlFully AutomaticFully Automatic / ManualManual, AutomaticFully AutomaticFully AutomaticManual, Automatic
Measurement Speed<3s for forward and reverse current, average display<3s for forward and reverse current, average displayN/A<3s for forward and reverse current, average display<3s for forward and reverse current, average display<3s for forward and reverse current, average display
Test MethodSingle-cycle, reversing DC ratiometric measurementSingle-cycle, reversing DC ratiometric measurementN/ASingle-cycle, reversing DC ratiometric measurementSingle-cycle, reversing DC ratiometric measurementN/A
Test Current Accuracy±10%±10%±10%±10%±10%±10%
Test Current Stability<10 ppm per second<10 ppm per second<10 ppm per second<10 ppm per second<10 ppm per second<10 ppm per second
Lead ResistanceMax. 100 mΩ for 10 A operationMax. 100 mΩ for 10 A operationN/AMax. 100 mΩ for 10 A operationMax. 100 mΩ for 10 A operationN/A
Voltmeter Input Impedance>200 kΩ>200 kΩ>200 kΩ>200 kΩ>200 kΩ>200 kΩ
Noise Rejection<1% ±20 digits additional error with 100 mV 50/60 Hz<1% ±20 digits additional error with 100 mV 50/60 Hz<1% ±20 digits additional error with 100 mV 50/60 Hz<1% ±20 digits additional error with 100 mV 50/60 Hz<1% ±20 digits additional error with 100 mV 50/60 Hz<1% ±20 digits additional error with 100 mV 50/60 Hz
Data TransferNoneReal-Time or from storage via RS232NoneNoneReal-Time or from storage via RS232None
Data StorageNone700 tests100 measurements200 test records200 test records1,500 measurements
Memo FieldNoneUp to 200 characters per test via integral keypadNoneNoneNoneNone
Battery Type7Ah NiMH rechargeable7Ah NiMH rechargeableNiMH rechargeable battery6V 7Ah sealed lead-acid6V 7Ah sealed lead-acidNiMH rechargeable battery
Battery Life1000 x 10 A tests1000 x 10 A testsNot specified>1000 Auto (3 sec) tests>1000 Auto (3 sec) testsNot specified
Battery Charge Time2.5 hours to 90%, 4 hours full charge2.5 hours to 90%, 4 hours full chargeApprox. 6 hours8 hours8 hours2.5 hours to 90%, 4 hours full charge
Operating Temperature+5°C to +45°C (Full Accuracy)+5°C to +45°C (Full Accuracy)Not specified-10°C to +50°C-10°C to +50°C+5°C to +45°C (Full Accuracy)
Storage Temperature-30°C to +70°C-30°C to +70°C-30°C to +70°C-25°C to +60°C-25°C to +60°C-30°C to +70°C
Temperature Coefficient<0.01% per °C from 5°C to 40°C<0.01% per °C from 5°C to 40°CN/A<0.01% per °C from 5°C to 40°C<0.01% per °C from 5°C to 40°C<0.01% per °C from 5°C to 40°C
Maximum Altitude2,000m (6562 ft)2,000m (6562 ft)N/A2,000m (6562 ft)2,000m (6562 ft)2,000m (6562 ft)
Safety RatingCAT III 600 V (with DH6 leads)CAT III 600 V (with DH6 leads)CAT III 50 VIn accordance with IEC61010-1, CATIII 300V (w/ cover)In accordance with IEC61010-1, CATIII 300V (w/ cover)CAT III 50 V
EMC RatingIP65 (case closed), IP54 (battery operation)IP65 (case closed), IP54 (battery operation)IP53IP65 (case closed), IP54 (battery operation)IP65 (case closed), IP54 (battery operation)IP53
Dimensions (mm)220 x 100 x 237220 x 100 x 237273 x 247 x 280315 x 285 x 181315 x 285 x 181270 x 250 x 180
Weight (kg)2.62.656.76.74
  • Measurement method: 4 wire
  • Ranges: 5mΩ, 25mΩ, 250mΩ, 2500mΩ, 25Ω, 250Ω, 2500Ω
  • Resolution: 0.1 µΩ, 1 µΩ, 10 µΩ, 0.1 mΩ, 1 mΩ, 10 mΩ, 100 mΩ
  • Accuracy: 0.05 % + 1 µΩ, 0.05 % + 3 µΩ, 0.05 % + 30 µΩ, 0.05 % + 0.3 mΩ, 0.05 % + 3 mΩ, 0.05 % + 30 mΩ, 0.05 % + 300 mΩ
  • Test Current: 10 A, 10 A, 10 A, 1 A, 100 mA, 10 mA, 1 mA
  • Voltage drop: 50 mV, 250 mV, 2,500 mV, 2,500 mV, 2,500 mV, 2,500 mV, 2,500 mV
  • Measurement modes: Inductive, non-inductive, non-inductive with automatic trigger
  • Temperature compensation: Automatic or manual
  • Data storage: 1500 measurements
  • Communication output: RS 232 link
  • Power supply: NiMH rechargeable battery
  • Dimensions: 270 x 250 x 180mm
  • Weight: Approx 4kg
  • Chauvin Arnoux CA6255 Micro Ohmmeter
  • 1 set of 3m cables terminated by Kelvin clamps
  • Euro mains power lead (2m long)
  • User manuals (available in 9 languages)
  • Simplified user guides (available in 9 languages)
  • MOT (Micro-Ohmmeter Transfer) data transfer software on CD-ROM
  • RS232 communication cable

🚚 Testersmans Shipping Policy

Free Mainland GB Delivery Over £150

We offer free delivery on most mainland Great Britain orders over £150 (ex VAT).
This applies across England, Wales, and most of Scotland, excluding certain remote or offshore postcodes.

If your order total falls just short of £150, or you’re a returning customer, feel free to contact us — we may be able to offer a discount code or delivery workaround.
📞 01945 738112 | ✉️ [email protected]

📦 UK Delivery Options

We work with both Royal Mail and DHL to offer reliable and flexible delivery across the UK:

  • Royal Mail – Best suited for lighter parcels and for customers in remote regions, including the Highlands, Islands, and Northern Ireland.
  • DHL – Ideal for most mainland UK orders, providing fast, tracked delivery and excellent reliability for time-sensitive shipments.

Our checkout system automatically displays the available delivery services for your postcode and order weight, ensuring you always see the most suitable options.

Note: Heavy, bulky, or freight-only orders will be charged separately.
Our website is designed for quick, transactional purchases rather than bulk or palletised orders.
Please contact us in advance for a tailored freight quotation if your order falls into this category.

⏱ Dispatch & Delivery Timing

We aim to dispatch all in-stock orders promptly, but delivery depends on both when you order and which service you select.

  • UK orders: placed by 2:00 PM Monday–Friday are usually dispatched the same day.
  • International orders: placed by 2:00 PM Monday–Thursday are usually dispatched the same day.

Orders placed after these times are processed the next working day. This means delivery may occur the following day or later, depending on the courier and service selected.

Once dispatched, your chosen delivery service determines how quickly your parcel arrives:

  • Standard services We use Royal Mail Tracked 24 or DHL Parcel as our ‘Standard’ services. They are not guaranteed to arrive next working day.
  • Premium services (e.g. Royal Mail Special Delivery or DHL by Noon) offer guaranteed delivery windows.

If your order is time-sensitive, we strongly recommend choosing a guaranteed service or contacting us before ordering to confirm availability.

Please note: For logistical reasons, we may occasionally adjust the delivery method selected at checkout. For example, smaller items may be better suited to letterbox-friendly packaging or may be at greater risk of delay or loss via certain services. We actively monitor courier and postal service disruptions—including strikes and delays—and may modify shipping arrangements to help ensure timely and secure delivery.

📅 Busy Periods & Delays

We always aim to dispatch promptly, but delivery times may be affected by:

  • Seasonal demand (e.g. Christmas, bank holidays, or industry shutdowns)
  • Courier network delays outside our control
  • Supplier lead times or calibration requirements for certain equipment

If your delivery is time-critical, please contact us before ordering so we can confirm stock and courier availability.

🌍 International Shipping

We ship worldwide using UPS Express Saver® and other trusted global courier partners. All international shipments are tracked and generally dispatched Monday to Thursday to ensure smooth customs clearance and transit.

Estimated delivery times:

  • Europe: 1–2 working days
  • North America: 2–3 working days
  • Asia-Pacific & Rest of World: 3–5 working days

Delivery times vary depending on location, customs clearance, and local courier performance.

💰 Taxes, Customs & Import Duties

International customers are responsible for any applicable taxes, customs charges, or import duties.
These are not included in our product or shipping prices.

Your courier will typically provide a secure payment link for any import charges once your parcel reaches customs.
If import fees are refused and the parcel is returned, we will issue a refund minus all incurred shipping and return costs.

📍 Using Your Own Courier

If you would prefer to arrange collection via your own courier (UK or international), please contact us before placing your order to coordinate collection from our Wisbech warehouse.

📝 Important Notes

  • Please ensure your delivery address and contact number are correct at checkout.
  • Undelivered parcels may be returned to us after a short holding period.
  • Redelivery or return fees may apply, even if your order originally qualified for free delivery.
  • By placing an order, you confirm your understanding and acceptance of this policy.

Additional information

Weight4000 g

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