Digital power meters
3 April 2013
Test & Measurement
The new WT300 series of digital power meters is the fifth generation of Yokogawa’s compact digital power meters: instruments that play a key part in ensuring optimum standards of energy efficiency and conservation by measuring the power consumption of electrical equipment.
Combining accurate and reliable power measurement over a wide power range with flexibility, ease of use and a choice of communication interfaces, the new instruments will help developers and manufacturers of electrical equipment – ranging from domestic white goods to lighting systems and air-conditioning equipment – to ensure that their products comply with emerging IEC and EN standards and increasingly complex and stringent specifications on energy efficiency.
Key features of the new instruments include a basic accuracy of 0,1% of reading, guaranteed accuracy over the entire measurement range (from 1% to 130%), a wide measurement range from standby power levels of a few mA up to the 40 A 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 series to be integrated into laboratory test benches or automated test setups on production lines. USB and GPIB or RS-232 are fitted as standard, and Ethernet is available as an option.
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.
Other features include a bandwidth of DC and 0,5 Hz to 100 kHz (up to 20 kHz for 40 A 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 5 or more.
For more information contact Trevor Grundlingh, Protea Electronics, +27 (0)11 719 5700, [email protected], www.protea.co.za
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