罗斯蒙特644温度变送器

技术培训PreparedbyEducationalServicesEdenPrairie,MN(USA)ReleasedJuly2001RevisionJune2006技术落后644温度变送器目录概述1-1标定测试2-1HART通讯3-1公共部分4-1组态4-1校验5-1安装6-1故障维修7-1EmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibited概述在本章节中，你将学习到644系列温度变送器工作原理以及组成部件、测量技术、附件、规范要求.完成本章节学习后你将了解以下内容:1.识别和描述的主要组件和这些组件的功能。2.了解工作模块的原理。3.了解主要的技术规范。Overview1-1EmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibitedD/AµA/DCommunicationsNonvolatileMemory-量程范围-组态-修正系数-标定常数D/A转换数字通讯冷端补偿参考输入ISOLATIONA/D转换方块图微处理单元：-传感器线性-量程-诊断-工程单位Overview1-2EmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibited电气模块–工厂密封–不可修复Overview1-3EmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibited产品信息•特点/优势•尺寸图•说明书•订货须知Referto644ProductDataSheetOverview1-4EmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibited说明书Overview1-5EmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibited订货须知Overview1-6EmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibited标定测试在本章中将学习在试验室怎样测试Model644温度变送器.完成本章节学习后你将了解以下内容:1.校验所必需的设备.2.了解回路负载图表.3.正确的电气线路连接.4.变送器的标准测试.BenchTesting2-1EmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibited测试设备电源:12–42.4Vdc万用表:41/2DigitFluke8840A电阻箱0.01%精度GeneralResistance热电阻-100热电偶信号发送器:0.01%精度ECTRON1120回路负载:Minimum250欧姆500Ohm0.01%2WHART通讯:Model275BenchTesting2-2EmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibited4–20mAdc12505000102030Load(欧姆)最小电源电压(Vdc)10004042.4最小负载=43.5*(端子电压–12.0)12.0OperatingRegion电源要求2501100HART通讯回路负载BenchTesting2-3EmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibited接线盒BenchTesting2-4传感器接线端子电源接线端子+_显示连接口EmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibited电阻箱T/C模拟器-mV信号源标准测试1234+-BenchTesting2-5电源mAMeter+-4.00mA250欧姆2-wire热电阻3-wire热电阻4-wire热电阻热电偶EmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibited常用功能本章节主要演示用HART通讯实现常用功能。通过本章学习后,你将知道:1.选择输入传感器.2.更改PV单位.3.改变量程上限各下限值.4.组态离线.5.测试设备.6.回路测试.CommonTasks4-1EmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibited可以选择传感器铂热电阻s2-,3-,or4-wirePt100,Pt200,Pt500,Pt1000:a=0.00385:Pt100:a=0.003916(0.00392)镍热电阻sNi1202-,3-,or4-wire铜热电阻sCu102-,3-,or4-wire热电偶Type:B,E,J,K,N,R,S,T,DINL,DINU,W5Re/W26Re毫伏值–10to80millivolts欧姆值2-,3-,or4-wire0to2000欧姆CommonTasks4-2EmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibited温度传感器温度传感器传感器产生一个可变的电信号输出随着温度的变化。如:热电偶Thermocouple-毫伏Millivolt热电阻RTD–阻值随温度而改变ResistanceTemperatureDevice对于热电偶和热电阻，可变信号下限部分必须与变送器相匹配，通过变送器产生一个可靠，标准的信号(4-20mA/HART)TemperatureSensors1-2RTDResistancechangeswithTemperatureThermocoupleVoltageOutputchangeswithTemperature4to20mASignal4to20mASignalTransmitterElectronicsTransmitterElectronicsEmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibited热电偶热电偶是由2种特性不同的金属导体所做(如:铁和铜镍合金)，在一端连接在一起。没有拧在一起的一段与仪表相连(电压表)，测量2中金属之间产生的电压.不同金属件的电压是不同的(millivolt).TemperatureSensors1-3TCWireCharacteristicsPositivelegNegativeLegTCWireColorWireColorTypeMaterialCodeMaterialCodeE镍铬合金Purple铜镍合金RedJ铁White铜镍合金RedK镍铬合金Yellow镍基热电偶合金RedT铜Blue铜镍合金RedRPlat13%RhoBlackPlatinumRedSPlat10%RhoBlackPlatinumRedHighT/CLowT/CEmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibited热电偶接地热电偶常用于热传导较好，且电磁干扰很少的场合。非接地，隔离热电偶可以提供传感器与外部的电气隔离热电偶根据引线颜色区分。下图是4种不同的热电偶。SingleGroundedDual,Ungrounded,IsolatedDual,GroundedUnisolatedSingle,UngroundedDual,Ungrounded,Unisolated+-++--++--++--+-TypeJTypeETypeKTypeT+White-Red-Red-Red-Red+Purple+Yellow+BlueTemperatureSensors1-4EmersonProcessManagement-EducationalServices-RosemountMeasurement-644SmartTemperatureTransmitterTraining-June2006-CopyrightedMaterial-DuplicationProhibitedTCTableTemperatureSensors1-5Eme