With manufacturing sectors from automotive to domestic consumer electronics under pressure to build greater energy efficiency into their products, test and measurement specialist Yokogawa today launched the fifth generation of its established range of digital power meters.
Combining accurate and reliable power measurement over a wide power range with flexibility, ease of use and a choice of communication interfaces, these new compact instruments will help developers and manufacturers of electrical equipment to ensure that their products comply with emerging IEC and EN standards — and the increasingly complex and stringent specifications on energy efficiency.
"Our products are hitting a 'sweet spot' — they are necessary," said Terry Marrinan, Yokogawa’s Vice President, Test and Measurement, for Europe and Africa. "We are also seeing more companies coming to us to make their products more efficient."
Key features of the new WT300 instruments include a basic accuracy of 0.1 per cent of reading, guaranteed accuracy over the entire measurement range (from one to 130 per cent), a wide measurement range from standby power levels of a few milliamperes up to the 40A currents used in induction cookers, and flexibility to enable users to target different technical and commercial applications.
This includes a range of communications interfaces, allowing the WT300 digital power meters to be integrated into laboratory test benches or automated test set-ups on production lines. USB and GPIB or RS232 is fitted as standard, with Ethernet available as an option.
Harmonic measurement capabilities
In addition to standard power measurements, the new meters offer a wide range of harmonic measurement capabilities, including the ability to carry out simultaneous measurement of normal power parameters such as RMS, mean or DC power along with measurement of harmonics up to the 50th order — as a result, overall measurement times are reduced.
Yokogawa says that the guaranteed accuracy of these new power meters results from the fact that the company has its own standards laboratory at its European headquarters in The Netherlands. This facility is the only industrial (i.e. non-government or national) organisation to offer traceable power calibration, to national and international standards, at frequencies up to 100kHz — a requirement for higher harmonic measurements specified in quality standards such as ISO9000.
The new instruments also offer a bandwidth of DC and 0.5Hz to 100kHz (up to 20kHz for 40A on the WT310HC), plus an auto-range function for measurement and integration. Software is also available for testing equipment compliance to industry energy-saving standards such as IEC62301 Ed2.0 and IEC62018 for standby mode equipment or for dealing with waveforms having a crest factor of five or more.