The Yokogawa CW240 power quality analyser is a complete tool for enhancing energy efficiency, finding areas for improvement and assessing equipment lifecycles. The meter provides in-depth information on how an item of equipment, an area of a plant or a complete facility is operating that goes beyond simply measuring power usage. The CW240 enables measurement in four systems at the same time in a single-phase 2-wire system and in the case of a single three-phase 3-wire system, it can measure two systems simultaneously. To help reduce set-up time and errors prior to the start of the measurement the CW240 checks whether wiring is correct. Wiring errors, reversal of current clamps and phases to be checked are displayed in a vector diagram to show errors and facilitate correct wiring. Settings made for data saving can be checked on the screen, this prevents data acquisition errors that may occur due to mistakes in voltage range setting, current clamp selection or data save item selection.

Measurement of Instantaneous Values
Unique 3-wattmeter display provides an immediate value for each measurement element (voltage/current/electric power, etc.) to allow users to cut energy costs through a better understanding of power consumption, maximum load factor and peak current.
Power Quality Measurement
Measures and displays active power, regenerative power and reactive power quality—along with simultaneous displays of each value.
Demand Management
Enables users to set the desired demand limit in preferred time units in order to determine the maximum power demand.
Harmonics Measurement
Reveals distortions in voltages and currents that can cause malfunctions and power loss. Measures harmonics from the 1st to 50th. User-friendly data display in list, bar graph (linear/log) or vector (inflow/outflow judgment).
Waveform Measurement
Displays voltage and/or current of each phase in easy to understand graphs.
Voltage Fluctuation Measurement
Detects time and date of each fluctuation occurrence, the fluctuation type, the rms values, and the start and end period.