描述
要重视DCS的干扰问题。要使DCS之间实现信号顺利传送,理想状态就是参与互传互递的DCS共有一个“地”,且它们之间的信号参考点的电位应为零,但在生产现场是不可能做到的。因为,各个“地”之间的接线电阻会产生压降,再者所处环境不同,这“地”之间的差异也会引入干扰,将会影响DCS的正确采样。干扰问题也是检查、判断DCS故障时要首先考虑的因素之一。
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