About ACR Systems Applications
Hardest Working Data Loggers in the Industry - ACR
Energy Management

Using ACR data loggers to log energy usage

ACR Data Loggers help business enterprises and government institutions realize energy management goals. Load studies uncover potential energy savings while data logging environmental conditions can reveal issues that can prematurely degrade equipment. The forms of energy where savings can be realized by data logging include electric, thermal, nuclear and solar, etc.

Data Logging Electricity

Energy transferred by electricity can be generated in many ways, usually connected to a common power grid that is AC Sinusoidal. The power coming from the grid is in its purest form, however since it can be generated from many large or small power plants, anomalies can occur. Portable data loggers can be placed anywhere data needs to be captured.

Power Generation companies use data loggers to monitor for maximum current conditions, especially were regular SCADA and telemetry are non-existent, or difficult to deploy. For example, HV transmission lines and under-sea cables are prime candidates for temporary monitoring applications where permanent line devices are ill suited.

Distribution benefits from the semi-permanent nature of the data logger with its long battery life, guaranteeing that the information is available at the end of the logging session – important at extreme low temperatures when demand is at its highest. ACR Data Loggers are known to work down to -60C (-76ºF).

End-users want to know their Energy Demand Profile in order to log energy usage for conservation efforts. Studies suggest that up to 20% savings can be obtained by managing daily, weekly, or monthly electricity use patterns. 

Thermal Energy Recording

Power Stations use data loggers to record temperature and flow data that can be converted into thermal units. These can be coal or natural gas fired plants - data loggers monitor turbine heat. Smaller, geo-thermal systems that extract energy from the earth, which is cause for scaled down measurement tools perfect for data loggers, are also coming on-line.

Thermal Distribution can be city-wide, or confined to a facility, requiring complex routing of pipes – these systems can be compromised when modified, which makes recording steam or water flow important. Boiler input and output temperatures are combined with flow to produce heat energy data in Joules or BTU.

End-users depend on hydronic circulator pumps to move water thru radiators that either heat or cool air thru thermal transfer. Heat pumps, air exchangers and all other conversion equipment are characterized by temperature differential. Thermal trending analysis provides performance data related to events such as night and weekend setbacks, short cycling and reset conditions (outdoor temperature).

Nuclear Energy Monitoring

Power Plants use temperature and humidity data recorders to monitor ambient conditions in order to ensure machinery is not exposed to corrosive atmospheres. Self-powered data loggers with radiation sensors to monitor low level contamination are used in place of chart recorders. Data Loggers record decay heat in spent fuel rods after use in nuclear reactors.

Solar Energy Logging

Solar Radiation recording is used to determine the number of sunny days locally as opposed to regional history. Photovoltaic voltage and battery charge current monitoring give total power production and light efficiency data. Solar thermal collection data logging produces relevant information for amortization of capital costs.   

Application Document

Energy Management (PDF)


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