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***装置
工艺简介
（工艺）
***石化有限公司
二00三年十二月
目 录
绪论···························································5
化工测量仪表···············································5
化工仪表的主要品质·········································5
一 基本误差和仪表的准确度·······································5
二 仪表的变差···················································5
三 仪表的灵敏度·················································6
四 仪表的稳定性·················································6
压力测量仪表···················································6
压力测量的基本概念·········································6
一 压力的定义···················································6
二 压力的单位···················································6
三 压力的表达方式···············································7
压力测量仪表的分类·········································8
一 液柱式压力计·················································8
二 弹性式压力计·················································8
三 压力变送器···················································8
PTA 工厂压力仪表介绍·······································9
压力表的安装、使用和维护···································9
一 压力表的安装·················································9
二 压力表的使用和维护···········································9
流量测量仪表···················································10
流量测量的基本概念·········································10
一 流量的定义和单位·············································10
二 流量测量的目的···············································11
流量仪表的分类·············································11
PTA 化工厂流量仪表介绍·····································12
差压式流量计···············································12
一 节流装置的流量测量原理·······································13
二 标准节流装置·················································14
差压变送器·················································15
一 概述·························································15
二 工作原理·····················································15
三 运行维护·····················································16
四 差压式流量计的安装···········································16
漩涡流
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