双线4-20mA标准电流模拟测量通道的验证过程和诊断过程

A Validation and Diagnostics Procedure of the Analogue Measurement Channels in 4-20 mA Standard

介绍了一种采用 4 - 2 0mA标准电流的模拟测量通道的检验过程———即验证过程和诊断过程———的新方法。这种方法对远距离大范围运行的系统 (如远洋船舶 )的状态控制极为有效。在任何情况下 ,它既能提供常规检测 ,还可以在温度检测中有特殊情况时指示故障通道。

This paper suggests a new approach to checking understood as a validation and diagnostics procedure of the analogue measurement channels in 4-20mA standard.The discussed method is very useful in field conditions especially for widespread long distance systems like those on ships.In each case it supports traditional methods but in the specific situations of temperature measurement it can indicate a faulty channel.