Auto Calibration Calibration Software C3 Computer Aided or Computer Controlled Calibration systems for semi or fully automatic testing of pressure transmitters, transducers, switches and gauges. This ORGABAU Software runs under DOS and WINDOWS. Pressure ranges between 1 kPa and 1 MPa bar are covered. Modules for relative, absolute, negative and differential pressure are available. The automatic calibration systems do fully comply with quality assurance systems such as ISO 9000 / EN 29000. Supplemental IMMS modules permit the administration of the complete inventory of measuring equipment.