In the below linked research paper published by Yale University's Journal of Industrial Ecology (now owned and managed by the International Society of Industrial Ecology), researchers from the University of Nottingham and Dartmouth University use a Yokogawa Test&Measurement CW240 Clamp-On Power Analyzer to measure the real power consumption of the investigated printing systems.
The CW240 is a portable three-phase power analyzer for field testing, maintenance, and service of equipment such as transformers, motors, and electrical distribution systems. It is a complete tool for measuring power quality, enhancing energy efficiency, assessing and improving equipment life cycles.
The Yokogawa CW500 is a portable power analyzer that logs transient power phenomena in addition to measuring single to three phase power.
Accessories for digital power analyzers include various voltage and current transformers, clamp-on current probes, and a selection of test leads.
Measure characteristics of devices that generate, transform or consume electricity. Also called power meters or wattmeters, these devices measure parameters such as true power (watts), power factor, harmonics, and efficiency.
Yokogawa's Power Analyzer software manages numeric, waveform, and harmonic data measurements. It enables data logging and instrument configuration from your computer.