目前国内在石油、化工、冶金、电站等大型生产企业,采用有源矩阵选点网络测温是常见的方法。但这种网络在使用中还存在美中不足,如干簧继电器动作不可靠,二极管易击穿,插板与插座之间接触不良,需要能源消耗,故障出现不易查出,因此维护工作量大。这些已在80年本刊第四期一文中谈到,但其中接线原理图有误,特此更正。本 Currently in large-scale oil and petrochemical industry, metallurgy, power plants and other large enterprises, the use of active matrix point network temperature measurement is a common method. However, there are still some drawbacks when using this kind of network. For example, the reed relay is not reliable, the diode is easily punctured, the contact between the board and the socket is bad, the energy consumption is required, and the trouble is difficult to detect. Therefore, the workload for maintenance is large. These are already mentioned in the fourth issue of the 80th issue, but the wiring diagram is wrong, hereby correct. this