Energy consumption meter with reusable data cartridge - has ultraviolet eprom logic circuits for recording peak and total power and interval power usage

摘要

The appts. contains circuitry which enables energy consumed at a given location to cause pulses to be generated as a function of the instant rate of energy use. The pulses are counted at succeeding discrete time intervals. The succeeding interval summation count values are recorded in digital form at respective discrete locations on an ultraviolet UV light-erasable PROM (EPROM) contained in a removable cartridge. The interval summation count values are summed to provide a grand total consumption figure which is fed into and stored at a discrete location in the EPROM memory at the end of the recording period. The succeeding interval counts are successively compared and the peak count value for that interval having the greatest energy usage within a particular total time period composed of a multiple of such succeeding discrete time intervals is recorded on the EPROM at the conclusion of the particular total time period and the cartridge is removed.