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仪表维修人员在现场进行巡回检查的过程中,当认为流量、差压等变送器的测量值不准时,用关闭三阀组上正、负截止阀和打开平衡阀的方法来检查变送器的零位。当变送器指针指示为零时,认为变送器基本上没有问题,而当变送器指针指示高于或低于零位时,一般则认为指示不准是由变送器的零点飘移引起,因此调变送器的零位调整螺母ZER0,使变送器的测量指针指示在零位。
Instrument maintenance personnel in the process of tour inspection, when that flow, differential pressure transmitter measurements are not allowed, with the closure of three valves on the positive and negative stop valve and open the balance valve method to check the transmitter Zero. When the transmitter pointer indicates zero, that the transmitter is basically no problem, and when the transmitter pointer indicates above or below the zero, the general is that the instructions are not allowed to drift caused by the transmitter zero drift , So adjust the transmitter zero adjustment nut ZER0, so that the transmitter measurement pointer at zero.