Chauvin Arnoux CA6541 1kV Megohmmeter

  • 50V to 1kV digital insulation tester that is able to operate on the most demanding job sites and locations
  • The CA6541 employs time-controlled testing to give a better understanding of the quality of the insulation
  • Supplied with 2 1.5m test leads, a 1.5m black guarded lead, 3 crocodile clips, and more useful accessories
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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

What's In The Box?

  • 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


  • 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

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