The Character of the Thermal Storage Demand Meter

Following a detailed description of the principle and construction of the thermal storage demand meter the author shows wherein it always indicates what may be called ``logarithmic average'' rather than ``arithmetic average'' of power consumption, heretofore indicated by practically all demand meters. The inherent faults of the ``arithmetic average'' or ``block interval'' meter are described and examples given demonstrating that the thermal storage meter alone recognizes the true heating effect that fixes size of equipment and therefore cost that should be assessed against the customer.