摘要
化工企业使用科里奥利质量流量计作为计量仪表、控制系统由DCS系统完成,文中分析了计量表本身误差、信号传输误差、安全栅信号转换误差、DCS系统误差的产生原因。并通过计算、对比、分析了MODBUS通讯和4～20 mA模拟信号的优劣,提高了计量系统的整体精度。
Chemical enterprises use Coriolis mass flowmeters as metering instrument,the control system is completed by DCS.This paper analyzed the metering instrument error,signal transmission error,safety barrier signal conversion error and the cause for generation of DCS system error.By calculation,comparison,it analyzed the advantage and disadvantage of MODBUS communication and 4~20mA analog signal,the entire precision is improved.
作者
曹文光
Cao Wenguang(No.1 Chemical Plant of PetroChina Daqing Petrochemical Company,Daqing 163714,China)
出处
《炼油与化工》
2018年第6期59-60,共2页
Refining And Chemical Industry
