Variable loads such as dimming controls can be profiled with short-term measurements that determine a load value pegged against another variable point that can be measured or accurately estimated over time. ECMs have to be metered to obtain actual savings

Variable loads such as dimming controls can be profiled with short-term measurements that determine a load value pegged against another variable point that can be measured or accurately estimated over time. ECMs have to be metered to obtain actual savings. Variable loads like dimming controls can be measured only by metering them first at full power and then at low power. Measure and plot the power use at various dimming points at consistent time intervals.