The Model 100D Data Acquisition Monitor is designed to accept 3-wire KYZ pulses (form C contact transitions) or 2-wire pulses (form A contact transition) on a single input channel and provide peak fixed window demand, present demand, total count, and the last 48 measurement intervals on an eight digit LCD display. In recent years, data acquisition monitors have been used by utility and IPP control room operators to track hourly over/under generation figures.