Apparatus for measuring a figure having a calibration mode and method for calibrating a measuring apparatus

摘要

An apparatus for measuring a dimension or aspect of a figure, such as a linear planimeter or a polar planimeter, for measuring a size and shape of a figure and having a calibration mode. The apparatus includes a carriage supported on a pair of rollers for movement along an axis. One end of a measuring lever is pivotally mounted to the carriage. A tracing member having a magnifying lens for tracing a figure is provided on the other of the measuring lever. A computer having a calibrating mode changing switch and a correction value recording switch are provided on the carriage. To calibrate the apparatus, the apparatus is switched into the calibrating mode by the calibrating mode changing switch and correction values are calculated based on a reference figure. Each correction value is stored in a nonvolatile memory of the computer.