A computer-controlled pressure standard

The operating principles, as well as the technical aspects of the implementation of a new computer-controlled pressure standard are presented The instrument can have dual use: either as a pressure source or ns a pressure sensor. The device is intended mostly fur use in problems where small differential pressures are of interest, i.e., 0-2.5 KPa and high accuracy is desired Such a pressure range encompasses, for example, most of the pressure,measurement applications ill subsonic wind-tunnel testing. The device interfaces to a PC and is ideal for fully-automated pressure transducer calibration applications. The accuracy of the pressures produced or measured by the device is 0.08 percent F.S. (Full Scale).