外贴式电磁流量计直管段

本文章主要介绍了：外贴式电磁流量计直管段,唐山汇中电磁流量计,电磁流量计不确定度测量,外贴式电磁流量计直管段等信息

(外贴式电磁流量计直管段)

转换器：由液体流动产生的感应电势信号十分微弱，受各种干扰因素的影响很大，转换器的作用就是将感应电势信号放大并转换成统一的标准信号并抑制主要的干扰信号。其任务是把电极检测到的感应电势信号Ex经放大转换成统一的标准直流信号。
(外贴式电磁流量计直管段)

德国EH仪表
这种压力传感器用来量测小于一大气压的压强，工业界有些真空压力传感器的读值是相对于一大气压（读值为负值），而有些是以其压力为准。
此仪器用来量测二个压强之间的压强差，例如量测滤油器两端的压力差，压差计也用来量测流量或量测压力容器内的液面高度。
此仪器和表压力传感器类似，不过此仪器会经过特别的校正，其量测的压强是相对海平面的压强。
流量仪表缺点
电磁流量计虽具有上述优良特性，但它还有一些不足之处，以致在使用上受到一定限制．主要有如下几点：①电磁流量计不能用于测量气体、蒸气以及含有大量气体的液体．②电磁流量计还不能用来测量电导率很低的液体介质，被测液体介质的电导率不能低于10－5（S/cm），相当于蒸馏水的电导率．对石油制品或者有机溶剂等还无能为力。③由于测量管绝缘衬里材料受温度的限制，工业电磁流量计还不能测量高温高压流体。④电磁流量计受流速分布影响，在轴对称分布的条件下，流量信号与平均流速成正比．所以，电磁流量计前后也必须有一定长度的前后直管段．⑤电磁流量计易受外界电磁干扰的影响
(外贴式电磁流量计直管段)

用于灌装的体积流量测量系统，4000118588工业应用中的所有传导介质都能被测量
一体化的几何构造能在非常小的旋转灌装器和非常紧密的灌装流水线上安装
通过E+H“FieldTool”操作软件，操作简便——图形化显示能够进行的分析和优化的灌装过程，完整的文本文件记录下仪表的设置，创建图表
3A、EHEDG认证
CIP、SIP清洗，也可用具有腐蚀性的介质进行外部清洗
无可移动部件
流体温度可达130℃
公称直径范围DN4...15
Magphant插入式电磁流量计
导电液体的流量检测——电磁流量监视计
一体化的流量?000118588有场合
可安装在：-不锈钢管，道小DN25-塑料管道，小DN15操作简便
(外贴式电磁流量计直管段)

1．直流励磁
直流励磁方式用直流电产生磁场或采用永恒磁铁，它能产生一个恒定的均匀磁场．这种直流励磁变送器的大优点是受交流电磁场干扰影响很小，因而可以忽略液体中的自感现象的影响．但是，使用直流磁场易使通过测量管道的电解质液体被极化，即电解质在电场中被电解，产生正负离子．在电场力的作用下，负离子跑向正极，正离子跑向负极．如图3—18所示．这样，将导致正负电极分别被相反极性的离子所包围，严重影响电磁流量计的正常工作．所以，直流励磁一般只用于测量非电解质液体，如液态金属等．
图3－18直流励磁方式
2．交流励磁
(外贴式电磁流量计直管段)

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