Digital power meter has both low and high current ranges

10 August 2005 Test & Measurement

The WT1600S from Yokogawa is a digital power meter designed to provide cost-effective measurements of both extremely small currents in energy-saving equipment and high currents in applications involving large loads. It combines up to four power measurements with two input current ranges of 10 mA to 5 A r.m.s. or 1 A to 20 A r.m.s., an input voltage range of 1,5 V to 1 kV and a frequency range of DC and 0,5 Hz to 300 kHz.

The instrument has two separate input elements for low and high current ranges, both of which can be used together in a system. A large 160 mm TFT colour display can display up to four power measurement parameters at once, with a choice of display formats including numeric, waveform, bargraph, vector, trend or combinations of these.

A harmonic measurement function is capable of measuring waveforms with a fundamental frequency ranging from 10 Hz to 1 kHz.

A motor evaluation function allows the WT1600S to measure a motor's output from a speed and torque sensor on the output and then calculate parameters such as mechanical power, synchronous speed, slip, motor efficiency and total efficiency. Analog inputs for torque and pulse inputs for speed can be accepted, and waveforms can be displayed to provide a visual picture of fluctuations in parameter values.

The instrument can also be used with Yokogawa's WTViewer 760122 software, which provides FTP client and server functions for data transfer and can also control up to four WT1600S instruments simultaneously.

For more information contact Charl Urquhart, Protea Communications & Measurement, +27 (0)11 719 5703, c&[email protected]

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