Chauvin Arnoux CA6541 1kV Megohmmeter

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Professional megohmmeter provides expert insulation analysis from 50V to 1kV and up to 4T ohms with auto calculation of insulation quality ratios.

rrp £1,050.00

now £845.00 (Ex. VAT) £1,014.00 (Inc. VAT)

rrp £1,050.00


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"4 Tera ohm, 1000V DC digital insulation tester"

  • Description

    C.A. 6541 1kV Megohmmeter - Digital Insulation Tester

    The C.A 6541 Megohmmeter is a high-performance 50V to 1kV digital insulation tester that supports the most demanding site conditions and is ideal for qualitative insulation analysis. The C.A. 6541 megohmmeter is a micro-processor-controlled unit that is equipped with highly advanced functions for measurement of insulation up to 4TΩ, AC/DC voltage, continuity at 200mA, resistance and capacitance.

    The 6541 mega ohmmeter can automatically calculate the polarisation index (PI) and dielectric absorption ratio (DAR) which can be used to qualify the quality and ageing of insulation. The CA 6541 HV insulation tester employs time-controlled testing to give a better understanding of the quality of the insulation. When a programmable time-controlled test has begun, the CA6541 automatically samples and memorises the insualtion values at a rate specified by the user. A smooth function is also available for when the measurement values are unstable. For every measurement function, a high or low alarm threshold can be stored which will be triggered when exceeded.

    C.A. 6541 1kV Megohmmeter Features:

    • Insulation up to 4 Tera Ohms at up to 1,000V DC
    • Automatic calculation of insulation quality ratios: DAR and PI
    • Programmable test period and plotting of R(t) curve (auto memorisation of 20 samples)
    • Automatic indication of voltage before and after measurement: 1 to 1000V AC/DC
    • Resistance from 0.01Ω to 400kΩ
    • Continuity range 0.01Ω to +40Ω (audible beep and lead compensation)
    • Automatic measurement capacity after each insulation measurement: 0.005 to 4.999 µF
    • Microprocessor-controlled
    • Large backlit LCD screen with bargraph
    • SMOOTH function
    • Insulation test voltages can be locked
    • Programmable alarms
    • Long battery life up to 21,000 insulation tests of 5s each
    • Hard, watertight case with rating of IP54
  • Specification


    • 50V range: 2kΩ - 200GΩ
    • 100V range: 4kΩ - 400GΩ
    • 250V range: 10kΩ - 1TΩ
    • 500V range: 20kΩ - 2TΩ
    • 1000V range: 40kΩ - 4TΩ
    • Accuracy: ±5% ±3 counts (2kΩ - 400GΩ), ±5% ±10 counts (400GΩ - 4TΩ)
    • Programmable test duration: 1 - 59 minutes
    • DAR (1min/30sec): 0.000 - 9.999
    • PI (10min/1min): 0.000 - 9.999
    • Customisable PI: 30s - 59min as required
    • Voltage test/Safety: 0 - 1000V AC/DC
    • Voltage alert: >25V
    • Test inhibition: >25V
    • Smooth function: Yes


    • Range: 0.01 - 39.99Ω
    • Current: >200mA - 20Ω


    • Range: 0.01 - 400kΩ


    • Range: 0.005 - 4.999µF
    • Memory Storage: 20 kbyte memory ( 20 test results)
    • Display: Giant LCD & bargraph
    • Power supply: 8 x LR14 batteries
    • Compliance: IEC 61010 CAT III 600V, IEC 61557
    • Dimensions: 270 x 250 x 110mm
    • Weight: 3.4kg
  • Supplied Accessories

    • C.A. 6541 Megohmmeter
    • 2 x 1.5m test leads
    • 1.5m black guarded lead
    • 3 x crocodile clips
    • Test probe
    • Simplified operating manual
    • Operating manual
    • 2m mains power cable
    • Accessories bag
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  • Delivery Information

    At we understand the importance of a reliable delivery service when shopping online. Especially when the goods are often essential to your working day. If your goods are required by a certain date please feel free to contact us for an honest and realistic indication whether this can be met. We aim to process all orders we receive within 1 to 3 working days, however from time to time we do have an increased demand for certain products or there might be delays from the manufacturer. In such cases delivery of your equipment may be subject to a minor delay.

    We use DPD/Interlink for all larger items and Royal Mail for smaller items and accessories. With DPD/Interlink you will receive a 1 hour delivery window on the day of delivery via e-mail/text and a notification 15 minutes before arrival so you will not have to wait around all day. You can even manage your booking online and re-arrange delivery for another date or arrange the goods to be left with a neighbour of your choice.

    We also offer delivery options for goods required urgently on certain products, all which are sent by DPD/Interlink.

    Our charges for UK deliveries:

    • FREE Delivery (on select products only): typically 3-5 working days*
    • Standard Delivery at £4.95: 2-3 working days
    • Next Working Day Delivery (on select products only) at £7.50
    • Pre-Noon Next Working Day Delivery (on select products only) at £9.50*
    • Pre-10.30am Next Working Day Delivery (on select products only) at £18.50*
    • Saturday Pre-Noon Delivery (on select products only) at £14.50*
    • Sunday Pre-Noon Delivery (on select products only) at £14.50*

    *UK mainland only

    NOTE! For next working day or Saturday/Sunday delivery options the order MUST be placed no later than 3pm on the working day before delivery is required. After 3pm, please arrange with our staff before selecting a priority delivery service. Priority services are available to UK mainland residents only (this might exclude certain areas in the north of Scotland).

    Customers outside the UK: exports to many countries all over the world. Prices for shipping vary on location and weight/dimensions. Costs are calculated for certain countries at the checkout. If your country is not included in this list please e-mail with your name, address and the items you would like to order for an accurate shipping quote or go to for more information.

    For more information on delivery, please see our terms and conditions.