Equipment selection When selecting equipment,first of all,it is necessary to choose products with high anti-interference ability,including electromagnetic compatibility(EMC),especially anti-external interference ability,such as:using floating technology,DCS with good isolation performance Second,you should also understand the anti-interference indicators given by the manufacturer,such as:common mode rejection ratio,differential mode rejection ratio,withstand voltage capability,how much electric field strength and high frequency magnetic field strength environment is allowed to work;strictly according to my country’s standard(GB/T13926)is a reasonable choice.The other is by examining its application performance in similar projects.
设备选型在选择设备时,首先,要选择有较高抗干扰能力的产品,其包括了电磁兼容性(EMC),尤其是抗外部干扰能力,如:采用浮地技术、隔离性能好的DCS系统;其次,还应了解生产厂给出的抗干扰指标,如:共模抑制比、差模抑制比、耐压能力、允许在多大电场强度和多高频率的磁场强度环境中工作;严格按我国的标准(GB/T13926)合理选择。另外是靠考察其在类似工程中的应用实绩。
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