HART协议压力变送器的在线校准

Online calibration for pressure transmitter based on HART protocol

在天然气流量计量系统中,基于HART协议的压力变送器因其良好的准确度和稳定性得到了广泛的应用。由于环境等诸多因素,压力变送器在实际应用中仍然会有测量误差,其误差直接影响着整个计量系统的准确度。本文主要讲述一种在线校准HART协议压力变送器的方法,并对校准后的数据进行分析,以提高整个计量系统的精度。

Pressure transmitter based on HART protocol has been widely used because of its accuracy and stability in natural gas flow metering system. However,the measurement errors of the device influence the accuracy of the system due to environmental and other factors. This paper describes an on-line calibration method for the device and the data are analyzed after calibration to improve accuracy of the whole system.