Yokogawa WT300 series digital power meters

The WT300 series digital power meters are 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.

The instruments will help developers and manufacturers of electrical equipment - ranging from whitegoods to lighting systems and air-conditioning equipment - to ensure that their products comply with emerging international standards and increasingly complex and stringent specifications on energy efficiency.

Key features of the instruments include a basic accuracy of 0.1% of reading, 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.

The WT300 series meters can be integrated into laboratory test benches or automated test set-ups on production lines. USB and GPIB or RS232 is fitted as standard and ethernet is available as an option.

In addition to standard power measurements, the 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.

Other features of the instruments 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 five or more.