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测量容器内液体介质的液位,当被测介质的重度恒定时,可以用单个差压变送器来实现。因为在这种情况下差压变送器的输出电流与被测液位成单值函数关系: I_i=f(h_i)(1)可是当被测介质的重度是变量时,差压变送器的输出电流不仅与介质液位高度有关,还取决于介质的重度,即 I_i=f(h,λ_i)(2) 今介绍两种用DDZ-Ⅲ型电动单元组合仪表构成的(?)重度补偿的液位测量方法。一、法兰式重度自补偿液位测量系统图1中,差压变送器A用于测量不同重度的液压,其输出作为除法器的除数信号;差变B用于测量介质
The level of the liquid medium in the measuring container can be achieved with a single differential pressure transmitter when the measured medium is of a very constant weight. Because in this case the differential pressure transmitter output current and the measured value of the liquid into a single value as a function of: I_i = f (h_i) (1) But when the measured medium weight is a variable, the differential pressure transmitter Of the output current is not only related to the level of the medium, but also depends on the severity of the medium, that is, I_i = f (h, λ_i) (2) Now introduced two kinds of combinations with DDZ- The level measurement method. First, the flange of the heavy self-compensation level measurement system Figure 1, the differential pressure transmitter A is used to measure the hydraulic pressure of different severity, the output of the divisor signal as the divider; differential change B for the measurement medium