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EETE JUNE 2013

Miniature Rogowski coils enable accurate non-contact current measurement Power Electronic Measurements’ latest generation of Rogowski coils for non-contact current measurement, is designed specifically for monitoring today’s most advanced power systems and semiconductors. The new CWT Ultra-mini probe offers higher maximum frequency and increased stability over a wider operating temperature range. The CWT Ultra-mini current transducer is a powerful development or diagnostic instrument for examining switching waveforms, ripple currents, transients or harmonics. The extended temperature range of -40°C to +125°C and improved temperature coefficient of 50ppm/°C allow accurate measurement of semiconductors operating at increased temperatures. In addition, the wider 3dB bandwidth of 30MHz enables engineers to analyse high-order harmonics in systems operating at high switching frequencies, or accurately monitor switching waveforms with rapid rise-times. The coil has a cross section of 1.6mm, allowing users to take measurements at locations that are difficult to access. It can be positioned between the pins of MOSFETs or IGBTs in packages such as TO-220 or TO-247. The complete CWT Ultra-mini range comprises several variants suitable for measurements from as low as 1A to a maximum full-scale current of 6000A. The new family also has enhanced transient response, and can measure fastchanging currents up to 80kA/μs and has typical measurement accuracy: ±2%. Power Electronic Measurements www.pemuk.com 3D motion development kit targets wireless orientation tracking Xsens has released a new development kit specifically for system integrators with a need for wireless orientation tracking, the MTw, suitable in markets which require wireless communication, like training and simulation, pedestrian navigation, test and measurement and robotics. The MTw Development Kit Lite contains a highly accurate, small, lightweight and wireless IMU with full AHRS capabilities, providing drift free orientation. It also includes a miniature wireless receiver, convenient mounting tools and Xsens’ user-friendly MT Software Suite, compatible with the MTi product portfolio. The proprietary Xsens wireless communication protocol enables real-time performance with a range of up to 10 meters. With the addition of the MTw Development Kit Lite, Xsens expands its portfolio of motion tracking solutions. In 2012, Xsens released its 4th generation MTi-10 and MTi-100 series, including IMU, VRU and AHRS options, as well as the flagship MTi-G-700 GPS/INS. Xsens www.xsens.com USB data acquisition unit offers four differential inputs for thermocouples The DT9828E thermocouple measurement module from Data Translation is designed for users looking for a very costeffective module, with all the basic features for temperature measurements and analyses without galvanic Isolation and four instead of eight differential inputs for thermocouples. The DT9828E provides the same 24-bit A/D technology as the other modules of the series, and achieves a typical accuracy of +/-0.1 °C. Like all DAQ modules from Data Translation, the DT9828E comes with an extensive set of drivers, tools and interfaces (e.g. for LabVIEW, MATLAB, etc.) and with the QuickDAQ 2013 data logging software. The module thus offers users a ready-to-measure solution for acquiring, displaying and saving data, and for exporting it to an Excel file. It achieves sampling rates of up to 600 Hz and runs entirely on USB power. The thermocouples are connected via screw terminals and automatically linearized on-board. The DT9828E supports the thermocouple types B, E, J, K, N, R, S and T. In addition to the four differential analog inputs, the module features four TTL digital inputs and four TTL digital outputs. Data Translation GmbH www.datatranslation.eu www.electronics-eetimes.com Electronic Engineering Times Europe June 2013 37


EETE JUNE 2013
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