Data processing and display algorithms for portable instruments

Data processing and display algorithms that have general utility to the processing of statistically poor data and its subsequent presentation on digital or digitally generated analog displays have been developed for microprocessor-based portable radiation instrumentation. By using a modified exponentially weighted filter, the data displayed become easy to interpret in a much shorter amount of time than normally required. The apparent time constant can be dynamically adjusted based on the statistical validity of the data. Related algorithms are used for the simulation of an analog meter movement and handling range changing on digital displays. When used together, these algorithms produce an accurate, stable presentation of data that is also visually pleasing