压力测试常见术语.docx

Pressure and Measurement Terminology from A-Z Absolute Pressure A pressure measured relative toa perfect vacuum. Atmospheric Pressure The total outside air pressure measured with reference to absolute vacuum. The pressure varies depending on geographical location, altitude and local weather conditions. Barometric Pressure The total outside air pressure measured with reference to absolute vacuum. The pressure varies depending on geographical location, altitude and local weather conditions. Calibration parison ofa pressure sensor output against the output ofa reference standard. Creep The change ina sensors output occurring with time after removal ofa load which had been applied for a specific period. Creep Recovery The change in no-load output occurring with time after removal ofa load which had been applied for a specific period. Drift A random change in output under constant load or pressure conditions. Full Scale The maximum measurement range for which a pressure sensor is calibrated. Hysteresis The maximum difference between pressure sensor output readings for the same applied load; one reading obtained by increasing the measurement from zero and the other by decreasing the measurement from rated capacity. Long Term Stability or Long Term Drift The amount of change ofa measured reading at exactly the same pressure and ambient conditions over a given period of time which is t