When the temperature of the medium is constant , the analysis of data presents that the diffusion coefficient of moisture increases with the reduction of absolute pressure and the rise of changing rate of pressure , among which the effect of the latter makes a big difference compared with that of the former 由数据分析可见，当介质温度一定时，木材水分扩散系数随绝对压力的减小和压力变化速率的加大而增加，且压力变化速率对扩散系数的影响大于绝对压力的影响。
Stcc and sstcc series capacitance transmitters have so many advantages such as new design , all specifications , easy installation , essence safety explosion - proof etc . they are famous for high accuracy , small , light , firm , convenient , good overload protection . stcc and sstcc series capacitance transmitters include pressure , difference of pressure , absolute pressure , flux , level and so on . the product whose options , signal , installation are according to the worldwide companies and price is very low observes domestic iec , so it is the best choice for the customer Stcc及sstcc系列电容式变送器包括压力差压绝对压力流量液位等品种，其选件信号制式安装方式完全与世界其它公司产品一致，也与我国推行的“ iec ”标准要求相符，并且价格优势明显，是你理想的最佳选择。
During the period of measurement , the transduction circuits transform the differential pressures , the absolute pressures and the temperatures received by the sensors into the voltage signals , and then , the voltage signals are transformed into digital signals by the a / d convertor . the mcu processes these digital signals and calculates the cumulation of the flow . finally the totalizers contact with the pc by rs - 485 bus to form a distributed measuring network 在测量过程中,系统以流量计节流所获得的差压信号作为主信号、绝压和温度信号作为补偿信号进行流量积算,这三种信号分别由相应传感器感知后,经各自的物理信号测量电路转换为电信号,再由a / d转换模块转变为数字量,交微控制器进行处理、积算。
