An on-line pH and conductivity calibrator is designed,which can be used to calibrate the conductivity of water and steam system and pH meter.This calibrator adopts the method of calculating pH,and indirectly measures pH value by measuring conductivity,which can avoid the influence of interference factors in pH measurement of low conductivity water.The AC resistance box is adopted and the digital potentiometer is used to realize the AC resistance.The digital AC resistance box is designed to simulate the conductivity in water and used to calibrate the instrument.On-line calibrator adopts LabVIEW on computer side as the control software of the upper computer,the embedded system with MCU as the core can realize the control of the functions such as acquisition,detection,calibration of secondary meter,data processing and data storage.
万方数据
维普
