Multi-channel automatic calibration system of pressure sensor

A multi-channel calibration system is designed to calibrate the pressure sensor in this paper. It composes of digital multimeter (DMM), high performance pressure generator, digital pressure calibrator and computer. Almost 10 pressure sensors can be calibrated at the same time. The upper software of this system is programmed by LabVIEW2014, which has four functions: data acquisition, information processing, error calculation and report generation. A sensor is calibrated by this system to validate the accuracy of this system. The experimental result shows that the pressure measuring range of the designed calibration system is 0 to 60MPa, the pressure accuracy class and the pressure fluctuation rate are superior to 0.05%F·S and 0.01%F·S respectively. It indicates that this multi-channel calibration system can meet the accuracy requirements of pressure sensor calibration.