In short, kW is the unit of load, work or demand. In electrical terms it is a rate of use. Whereas kWh is a consumption unit for measuring an amount of electricity consumed. For more details see, kW or kWh: Electrical Energy Unit Confusion
ATLAS loggers receive pulses from any type of resource meter (electricity, gas, water, steam, etc). The meters send a pulse signal each time a certain amount of the resource has been used, e.g. 5 kWh electricity or 10 Litres water.
The ATLAS loggers count the number of pulses they receive on each input channel into 15 or 30 minute periods.
The AtlasEVO system software collects this resource use information from the ATLAS loggers, stores it permanently, and provides comprehensive analysis & reporting tools to facilitate analysis of the data. For more see How do ATLAS Energy Management Systems work?
This is again something that is largely dependent upon your type of organisation but as a general example, by analysing the data collected by a permanently installed energy monitoring system, or portable energy monitor you can see patterns of use and, when combined with knowledge of production, building occupation, or other workings of your organisation, can identity possible overuse with for example equipment or lighting being left powered unnecessarily.
Analysis of data from individual machinery, lighting circuits, or production lines for example can confirm or otherwise the efficiency of existing equipment and provide the basis of a proposal to upgrade or replace equipment.
Care should be taken when analysing data from single phase surveys as report totals may include floating values picked up on phase 2 & 3 coils. The ProPower 3 software can be set for single-phase surveys when loading data specifically to eliminate this possibility.
The measuring circuitry in the Profile does not tend to drift significantly over time. However, if you suspect an issue, or require calibration documentation for auditing or other purposes, then please contact us for a cost for re-calibration or repair if necessary.