仪表回路也就是仪表或仪表元件的工作过程。 回路，在电气通用原理中，电流经某一元件流进经另一元件流出，必须构成完整的闭合回路。 仪表回路，大多是模拟电子回路。
利用可编程序控制器实现仪表回路的PID调节控制。
PID regulation in instrumentation circuit is realized by using program logic controller.
本文介绍了仪表回路试验的方法以及常见故障的处理措施，经实践检验，该方法和措施对仪表回路的试验工作具有参考价值。
This paper has introduced common testing methods as well as fault handling measures by practice, these methods and measures have reference value for the testing work of meter loop.
45分钟主回路的水位继续下降。控制室中的仪表误报水位在上升。
45 min the water level in the primary loop continues to drop. Gauges in the control room erroneously indicate that the water level is up.
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