- THE MAGAZINE
Onset, Bourne, Mass., developed the HOBO Plug Load Logger, a high-accuracy, easy-to-deploy data logger that measures and records the power and energy consumption of 120V plug loads from office equipment, vending machines and other devices.
The HOBO Plug Load Logger provides 0.5% measurement accuracy with a measurement resolution of 1 watt, making it an ideal choice for building audits where detailed energy use data is required. The logger can measure up to six parameters—true RMS voltage, true RMS current, watts, watt-hours/kilowatt-hours, apparent power and power factor—to provide a comprehensive plug load profile. And, its rugged housing is designed to withstand the rigors of real-world handling, providing reliable performance despite bumps, drops and use under desks.
The HOBO Plug Load Logger streamlines energy auditing applications in a number of ways. For example, it features an easy-to-view LCD that visually confirms logger operation and battery status and displays real-time plug load variables without having to connect the logger to a computer to view the information. The logger’s large memory capacity is capable of storing 1.9 million measurements, enabling faster logger intervals for more comprehensive plug load profiles, as well as longer deployment periods between offloads. And, the logger’s “meter mode” allows users to quickly get a read on the current energy use of a particular area of interest with zero software setup.
Once load data has been recorded, it can be easily viewed in graph form and analyzed using Onset’s HOBOware graphing and analysis software for Windows and Mac. The software makes data readout provides powerful plotting tools and enables plug load data sets to be easily combined with data from other types of HOBO data loggers commonly used in building energy audits.
Onset Computer Corp.