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Presentation. New EU Directive i nitiates development of new Magnetic Field Meter Åke Amundin 2012-09-10. Congratulation to the 150 years anniverery. Riga Technical University was founded 14 th of October 1862. RTU is the oldest technical university in the Baltic states.

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  1. Presentation New EU Directive initiates development of new Magnetic Field Meter Åke Amundin 2012-09-10

  2. Congratulationto the 150 yearsanniverery • Riga Technical University was founded 14th of October 1862. • RTU is the oldest technical university in the Baltic states. • For Combinova it is an honour to participate in the celebration.

  3. Agenda • Short presentation of myself and Combinova • Some background and the R&D mission • Development steps • Hardware • Firmware • PC Software • The resulting specification

  4. Åke Amundin • Management positions from Swedish companies as Electrolux AB and Incentive AB. • Oneof the mainownersof Combinova for nearly 10 yearsand Managing Director for last 4 years.

  5. History • Combinova was founded 1981 • 1987 the first instrument for measuring magnetic fields was introduced. • The instruments were designed to verify exposure limits due to MPR II and the newly introduced TCO-label for CRT-displays. • 2006 Combinova became exclusive distributor in Sweden for Chroma ATE Inc, Taiwan. • 2012 the distributorship was extended to also include Latvia.

  6. Product rangeownproducts

  7. Chroma Product Range Programmable AC- and DC-sources Automatic Test Systems Electric Safety Test Equipment Electronic Loads

  8. Chroma Test Applications • Power Supply Testing • Battery Testing – both battery cells and battery packs • Solar Array Simulations • Test of Inverters • PLD Testing • Test of LED-drivers

  9. Our Partner in Latvia • BALTIC & SCAN-TECH

  10. Why all concern for EMF? • Electromagnetic fields can have an adverse health effect on human bodies. • At lower frequencies (<100 kHz) induced current can cause interference with nerve system. • At higher frequencies human tissue can get heated up • EU is working on a directive to limit workers exposure for EMF. • This initiated our decision to develop a new advanced magnetic field meter.

  11. ICNIRP Reference levels

  12. The EU-directivewillhaveimplicationsinternationally Manufacturers of Induction heating equipment, Welding equipment Household appliances Electric and Hybrid vehicle manufacturer Electric industrial ovens Etc. has to consider the EMF fields around their products.

  13. The R&D Mission • An auto ranging dynamic range from 10 nT to 10 mT • A frequency range from 5 Hz to 400 kHz • A built in spectrum analyzer • Evaluation to frequency dependent exposure limits like ICNIRP • Peak detection in time domain • Logging with spectrum • Presentation of spectrum and measurement data on a graphical display • PC interface

  14. Hardware Design • A loop sensor with three orthogonal loops was described in early standards The area of each loop should be 100 cm2. • A fast DSP to take care of all calculations • A host processor to take care of communication via USB 2, man – machine interface and administration and storage of data. • Litiumion battery for 12 hours operation

  15. Signal handling in frequency domain Amplifiers Intergrators 2-400 kHh DSP Adjust FFT X-coil Global RMS X-,Y- and Z Spectrum graph Largest signals 5 Hz -2 kHhz Y Z

  16. Signal handling in time domain Amplifiers Intergrators 2-100 kHz DSP Peak value RMS value X-coil 5 Hz -2 kHhz

  17. Resulting Specification Frequency Domain • Measurement range: 10 nT -10 mT • Frequency range: 5 Hz – 400 kHz • Selectable frequency response: • - flat • - according to EN 50366 and IEC 62233 • - according to ICNIRP public and occupational exposure limits • Accuracy: ±(1 % of reading +2 nT) from 5Hz to 400kHz • Sensor: Orthogonal three axis coil. Coil area 100 cm² • Display type: Graphical display 320x240 dots with touch panel • Communication: USB 2 interface for PC communication • Power: Smart Litium ion battery, 10.8 V and 4.8 Ah

  18. Resulting Specification Time Domain • Measurement range: 2 µT - 14 mT peak • Frequency range: 5 Hz – 100 kHz • Frequency response: Selectable: • - flat • - according to ICNIRP public and occupational exposure limits • Accuracy peak: ±(5 % of reading +150 nT) from 5Hz to 50 kHz ±(8 % of reading +150 nT) from 50 to 100 kHz • Accuracyrms: ±(2% of reading +150 nT) from 5 Hz to 100 kHz

  19. MFM 3000

  20. MFM 3000Software • Features: • Import logged data • Remote control • Time Graph • FFT Graph • Harmonics Graph • Band Pass/Stop • Easy to implement new languages • Evaluation to ICNIRP limits etc • Export to Excel, Word and txt-files • T, A/m or Gauss

  21. Some reflections on the R&D process • Hardware design was accomplished according to plan • Firmware design was heavily delayed and did cost much more than budgeted • Software development is a never ending story

  22. Opportunity for demonstration MFM 3000 and the PC-software will be available for demonstration

  23. Any questions?

  24. Thankyou for your attention Combinova AB Åke Amundin Domkraftsvägen 1 SE-197 40 Bro Sweden Tel: +46-8-627 93 10 Mobile: +46-708-20 19 65 ake.amundin@combinova.se www.combinova.se

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