孔板流量计的差压值和密度的相关介绍：
1、孔板流量计差压值，差压变送器的精度、量程比对孔板的精度、量程比有很大的影响。近年来江苏西亚自动化仪表在不断地提高差压变送器的精度、量程比。下面以常用的rosement3051cd2-5差压变送器为例进行分析。该变送器在10：1的量程范围内精度为0.065%，超过10：1量程范围的精度为。
2、孔板流量计密度ρ：密度的变化对于流量的影响至关重要，尤其对于介质为气体或蒸汽的流量测量。随着计算机技术的发展，密度的补偿已经成为很容易的事情，可以很容易地将气态方程或蒸气的密度表或液体密度随着温度压力变化的公式写在计算机中。但并不是任何范围的温度压力的变化都可能通过密度的补偿来弥补。此外，孔板流量计的安装位置、安装同心度、直管段、阻力元件、变送器的温漂、零漂等问题都对流量都有很大的影响。自然也会影响到量程比。 所以密度虽然至关重要，但是只要相关的一些补偿的方法做得好的话，密度对量程比的影响是比较小的。
英文翻译：
differential pressure orifice flowmeter is introduced and the density value:
1, orifice plate flowmeter differential pressure, differential pressure transmitter, the precision of range alignment hole plate precision, range ratio has a great influence. in recent years, jiangsu automation instrumentation in improving the accuracy of differential pressure transmitter, measuring range ratio. the following rosement3051cd2-5 differential pressure transmitter is used as an example for analysis. the transmitter in the range of 10:1 within the accuracy of 0.065%, more than 10:1 range accuracy.
2, orifice plate flowmeter density: density changes is crucial for the impact of traffic, especially for the medium to flow measurement of gas or steam. with the development of computer technology, the density of the compensation has become a very easy thing, can easily be density meter or liquid density equation of gaseous state or steam with the temperature and pressure changes formula written in a computer. but the change of temperature and pressure is not any range can be made up by density compensation. in addition, orifice plate flowmeter installation location, installation of concentricity, straight pipe, resistance, the transmitter temperature drift, zero drift problem has great effect on the flow. nature also can affect the range ratio. so the density are vital, but as long as some http:// compensation approaches related to do it well, effect of density on the range ratio is relatively small.