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News - Board and System Test

High Speed Measurement Option for Precision Power Analyzer

Yokogawa_WT180027 September 2011- The new /HS option for the Yokogawa WT1800 precision power analyzer provides fast, accurate measurements of power parameters such as voltage, current, power, torque, speed and mechanical power with millisecond response. This allows it to capture numeric data on the change of status during one rotation of a motor when the motor is started, when the rotation speed changes, or when the load condition varies.

This new function takes advantage of the WT1800’s sampling frequency (up to 2 MS/s) and its unique ability to carry out calculations on measured parameters in real-time.

The new high-speed data-capturing function can measure 3-phase voltage/current/power and torque/rotation speed/mechanical power every 5 ms (when external synchronisation is off) or every 1-100 ms (depending on the clock signal frequency) if external synchronisation is on.

It transmits a block of data every second to an internal or external memory or to a PC using a communications interface. Every second, the WT1800 updates its displays with the previous one second of data.

The average characteristic is set using the cutoff frequency of the high-speed filter for measured data during the 5 ms or 1-100 ms period. The cutoff frequency can be varied from 1 Hz to 1 kHz in 1 Hz steps. Wiring configurations include single phase for DC input, 3-phase 4-wire and 3-phase 3-wire (3V/3A).

The new firmware will also support German and Chinese menus and messages.

Major target markets for the WT1800 with the high-speed option include motor and inverter evaluation in the automotive and aerospace sectors as well as alternative energy and power conditioning applications.

www.tmi.yokogawa.com


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