3051压力变送器的常见故障及排除
压力变送器常见故障分析以及解决方案
压力变送器常见故障分析以及解决方案压力变送器是一种工业自动化控制装置，在工业自动化过程中非常常见。
但是在使用过程中，由于各种因素，可能会出现各种故障，如何迅速准确地判断和解决故障成为了工程师的必修课。
本文将会介绍压力变送器的常见故障及解决方案。
常见故障分析与解决方案1. 无输出信号问题描述如果出现无输出信号，那么首先需要检查变送器的电源、信号输出线路、压力接点、与控制器的连接线路等。
可能原因•电源线路受到干扰，或供电电源不足。
•功率隔离器失效。
•变送器信号输出线路有断路。
•存在压力接点、测量接线不良或者没有接线。
•与控制器的接线不良。
解决方案•检查变送器的电源，并确保其供电电源足够。
•检查功率隔离器的状态是否正常。
•检查变送器信号输出线路是否存在断路，及时更换。
•检查压力接点、测量接线是否良好，有没有接好。
•检查连接线路，确保与控制器的接线良好。
2. 信号不稳定问题描述如果信号不稳定，建议检查压力管路，压力点接口、电缆连接接口等。
可能原因•压力点的管路未经过处理。
•压力点的接口未连接牢固。
•电缆接口电磁场干扰。
•与控制器之间信号线路存在短路或断路。
解决方案•处理压力管路，确保管路畅通无阻，无进气情况发生。
•检查压力点的接口，确保连接良好。
•检查电缆连接接口，避免电磁波的干扰情况。
•检查与控制器之间信号线路是否存在短路、断路情况，及时更换维修。
3. 信号值不准确问题描述如果出现信号值不准确的情况，那么建议需要检查压力点，压力传感器的灵敏度以及环境状态。
可能原因•压力点温度过高或过低，影响传感器的温度补偿性能。
•环境中湿度过大，导致电路寄生电容产生，影响变送器的信号输出。
•压力点倒装，或被异物堵住，影响测值。
•压力传感器的灵敏度不够，影响变送器的精度。
解决方案•修理压力点环境，或将压力点移动到环境适宜的位置，保障传感器温度补偿性能。
•降低环境湿度，减小电路寄生电容的影响。
•检查并及时处理压力点倒装和异物堵塞的情况。
罗斯蒙特3051型智能压力变送器检修规程(DOC)
罗斯蒙特3051型智能压力变送器检修规程(DOC)1. 简介罗斯蒙特3051型智能压力变送器是一种用来检测流体压力的设备，广泛应用于石油化工、机械、电力、冶金等行业的自动化控制系统中。
本文档主要介绍罗斯蒙特3051型智能压力变送器的基本构造、检修前的准备工作、检查过程和注意事项。
2. 基本构造罗斯蒙特3051型智能压力变送器由传感器、附件和电路板组成，传感器用来检测流体压力变化，附件用来连接传感器和控制系统，电路板用来处理传感器采集到的信号，并向控制系统输出压力值。
传感器部分采用先进的层压半导体技术，以满足各种应用环境的要求，包括高温、高压、低温、低压等状态。
附件包括法兰、接头、导管等，有多种不同材质和规格可供选择，以适应不同的管道尺寸和流体类型。
电路板具有高精度、高可靠性和自动校准等特点，同时还具有HART通信协议，可将测量值传输至上位机或PLC 等设备。
3. 检修前的准备工作在进行检修前，必须先对检修区域进行安全检查，确保没有任何潜在的危险因素。
同时，需要准备好下列工具和设备：•液压或气动泵•夹具和扳手•螺丝刀和电工钳•清洁剂和布•相关技术资料和说明书4. 检查过程4.1 断电和拆除在进行检查之前，必须先断开设备的电源或气源，并拆卸与控制系统的连接。
4.2 清洗和检查使用清洁剂和布对传感器、附件和电路板进行彻底的清洗，以确保无灰尘、油脂和其他污物等。
接着，检查传感器是否有氧化或腐蚀现象，并检查附件和电路板是否有裂纹、变形或其他损坏。
4.3 维护和更换根据需要，对传感器部分进行涂油或更换密封圈等维护工作。
如果发现任何损坏或故障，应及时更换对应部件。
4.4 装配和连接在进行装配和连接之前，必须先进行必要的校准和检测。
在安装传感器时，应注意对其进行正确的定位和定量。
5. 注意事项在进行检查和维护过程中，务必遵守以下注意事项：•确保控制系统处于关闭状态•使用正确的工具和设备•保持检修区域的清洁和干燥•避免用过硬的物体碰撞和刮伤设备表面•严格遵守相关规程和安全操作规范，罗斯蒙特3051型智能压力变送器是一种高精度、高可靠的流体压力检测设备。
3051压力变送器超量程故障处理
一、现场3051压力变送器故障排除步骤
1、根据控制室趋势图进行分析故障原因，工艺误判断（一般趋势指示一边压力示值程缓慢变化趋势，或根据工况有规律变化，）仪表问题，（一般趋势图不程缓慢变化，变化幅度非常剧烈）
2、参照变送器指示压力和现场就地指示压力表显示压力值，并确认测量管道是够有余压。
3、根据现场变送器指示，如上次处理故障为超量程，首先对其进行断电，而后在送电进行观察，如果故障显示仍然为超量程，那么测量一下电流值是否对应其指示压力值，
4、根据上文故障处理步骤，对故障进行范围性缩小排除，
5、确认测量管道内无压力情况下，打开调零螺丝，对其进行一次到两次机械零点调整，故障仍然显示为超量程，那么就要考虑是否存在蹩压现场，
6、缓慢旋转测量管螺栓，以免被蹩压溅射测量介质，拆卸后对其在进行机械零点调整，最终确认故障为仪表本事故障，（1、变送器3大模块有故障2、变送器感压膜片变形）
7、更换30513模块后故障仍为超量程，那么最后判定变送器感压膜片变形或者损坏。
结合上一故障处理步骤，你要理解故障处理大致思路为，预判断--逐步排查缩小判定故障点--确认故障位置。
压力变送器常见故障与及分析
压力变送器常见故障与及分析压力变送器是一种常见的工业自动化仪表，用于测量和传递工业过程中的压力信号。
在使用过程中，压力变送器可能会出现一些常见的故障，例如零点漂移、量程漂移、输出信号不稳定等。
以下是对压力变送器常见故障的分析以及可能的原因和解决方法。
1.零点漂移零点漂移是指在无任何压力作用时，测量到的输出信号不为零。
可能的原因包括：机械部件撞击或振动、温度变化、电源电压波动等。
解决方法包括：重新校准零点、检查机械连接是否稳固、检查电源电压是否稳定。
2.量程漂移量程漂移是指在一定的压力范围内，测量到的输出信号不稳定或不准确。
可能的原因包括：机械部件磨损、密封不良、温度变化等。
解决方法包括：检查机械部件是否正常工作、更换密封件、进行温度补偿。
3.输出信号不稳定输出信号不稳定是指在稳定的压力下，测量到的输出信号波动较大。
可能的原因包括：供电电压不稳定、电磁干扰、传感器故障等。
解决方法包括：检查供电电源是否稳定、排除电磁干扰、检查传感器的连接和性能。
4.静压补偿不准确静压补偿是指在存在静态压力时，测量到的压力值与实际值不一致。
可能的原因包括：静压补偿装置损坏、参数设置错误等。
解决方法包括：检查静压补偿装置的状况、重新设置参数。
5.温度补偿不准确温度补偿是指在不同温度下，测量到的压力值与实际值不一致。
可能的原因包括：温度传感器故障、温度补偿参数错误等。
解决方法包括：检查温度传感器的连接和性能、重新设置温度补偿参数。
6.传感器失效传感器失效是指压力变送器测量压力值时无法正常输出信号。
可能的原因包括：传感器老化、损坏、连接不良等。
解决方法包括：更换传感器、检查连接是否稳固。
以上是压力变送器常见故障的分析以及可能的原因和解决方法。
在使用压力变送器时，应定期检查和维护，及时排除故障，以确保其正常工作并提供准确的压力信号。
罗斯蒙特3051型智能压力变送器检修规程(DOC)
3051型智能变送器检修工艺规程批准:审定:审核：初审：编写：舒惠2005／０3/27罗斯蒙特3０５1型智能压力变送器检修规程1．适用范围本规程适用于３051智能型压力变送器的检修与检验,保证检修质量与工艺符合要求。
2. 引用标准本规程引用以下标准：罗斯蒙特3051型智能压力变送器使用说明书；罗斯蒙特压力产品选型说明。
3. 概述3.1 工作原理３051压力（差压）变送器内有一隔离膜片，压力(差压）信号的变化经变送器内含的一种灌充液(硅油与惰性液）通过隔离膜片转换为电容的变化传送至压力传感膜头,压力传感膜头将输入的电容信号直接转换成可供电子板模块处理的数字信号，再经电子线路处理转化为二线制4－２0ｍＡ.ＤC模拟量输出。
3.2传感膜头３051系列变送器传感膜头与过程介质和外部环境保持机械、电气及热隔离，可释放传感器杯体上的机械应力，提高静压性能。
３0５１型传感器膜头还可进行温度测量，用于进行温度补偿。
传感膜头内的线路板能将输入的电容与温度信号转换成可供电子板模块进一步处理的数字化信号。
3.3电子线路板电子板采用专用集成电路(ＡSIＣ)，该板接受来自传感膜头的数字输入信号及其修正系数,对信号进行修正与线性化。
电子板模块的输出部分将数字信号转为模拟量输出，并与ＨART手操器进行通讯。
标准的30５1型模拟量输出为4-20ｍA;低功耗变送器为电压输出（1－5V或0.8-3．2V)。
可选液晶表头插在电子板上，以压力、流量或液位工程单位或模拟量程百分比显示数字输出。
3.4数据存储组态数据存储于变送器电子板的永久性ＥEＰRＯM中，变送器掉电后,数据仍保存，故而上电后变送器能立即工作。
3.5数／模转换与信号传送过程变量以数字式数据存储,可以进行精确的修正和工程单位的转换。
信号经修正后的数据转换为模拟输出信号。
ＨART手操器可以直接以数据信号方式存取传感器读数，不经过数/模转换以得到更高精度。
3.6通讯格式3051型采用HART协议进行通讯。
压力变送器的常见故障处理
压力变送器的常见故障处理概述压力变送器作为工业自动化控制系统中重要的传感器之一，经常会遇到各种故障。
本文将通过分析和总结压力变送器常见的故障现象，提出相应的解决方案，以帮助读者更好地解决问题。
常见故障现象及分析1. 输出信号异常或不稳定输出信号异常或不稳定是压力变送器常见的故障现象之一。
其可能的原因有：•传感器的接触不良；•传感器的电缆损坏或连接不稳；•传感器测量介质的压力、温度等参数波动过大。
解决方案：•检查传感器与系统的连接是否牢固，需要重新插拔插头，确保接触良好；•检查传感器的电缆是否完好，如发现损坏、老化等现象，更换电缆；•通过调整测量介质的压力、温度等参数，或者更换更为稳定的介质，以保持输出信号的稳定。
2. 输出信号异常或偏差较大压力变送器导致输出信号异常或偏差较大的原因有：•传感器在运输、安装、维护等过程中造成了机械损伤；•传感器的感温元件或电子接口损坏；•系统的电源电压不稳定，或电缆电导出现异常；•传感器更换后，未进行重新校准。
解决方案：•检查传感器是否存在机械损伤，包括有无敲击、挤压、掉落等现象；•检查传感器的感温元件和电子接口是否损坏；•检查系统的电源电压是否稳定，或更换更为适合的电缆；•在更换传感器后，及时进行校准，确保输出信号合适。
3. 压力传感器输出信号发生“死区”传感器输出信号发生“死区”是因为传感器在测量介质的过程中出现了一些问题，导致输出信号不稳定或中断。
解决方案：•检查传感器的信号线是否受到电磁干扰，如果是，则采取屏蔽措施；•检查传感器是否接触不良，可以进行检查，并逐一排除故障点；•检查系统的接地情况并适当调整，可以减小电磁干扰的影响。
总结通过以上几个方面的分析，可以有效地解决压力变送器常见故障问题。
当然，实际的故障情况是多种多样的，解决问题也需要结合具体情况具体分析，确定问题、分析原因并采取相应的措施。
3051压力变送器的检修
3051压力变送器的检修压力和差压是工业生产过程中常见的过程参数之一。
在许多场合需要直接检测、控制的压力参数，如锅炉的气包压力、炉膛压力、烟道压力；化学生产中的反应斧压力、加热炉压力等。
此外，还有一些不易直接测量的参数，如液位、流量等参数往往需要通过压力或差压的检测来间接获取。
因此，压力和差压的测量在各类工业生产领域中如石油、电力、化工、冶金、航天航空、环保、轻工等占有很重要的地位。
第一节变送器基础知识变送器在自动检测和控制系统中的作用，是将各种工艺参数，如温度、压力、流量、液位、成分等物理量转换成统一的标准信号，以供显示、记录或控制之用。
分类──按被测参数差压变送器压力变送器温度变送器液位变送器流量变送器等变送器的理想输入输出特性一、变送器的构成原理模拟式变送器的构成原理数字式变送器的构成原理（1）模拟式变送器的构成原理模拟式变送器的组成：测量部分，放大器，反馈部分，零点调整和零点迁移模拟式变送器的输入输出关系当满足>>1的条件时模拟式变送器的理想输入输出特性（2）数字式变送器的构成原理：数字式变送器组成:二大部分硬件电路──以微处理器CPU为核心软件──包括系统程序和功能模块a.数字式变送器的硬件构成智能式变送器还配置有手持终端(外部数据设定器或组态器)，用于对变送器参数进行设定，如设定变送器的型号、量程调整、零点调整、输入信号选择、输出信号选择、工程单位选择和阻尼时间常数设定以及自诊断等。
b.数字式变送器的软件构成──包括系统程序和功能模块系统程序:对变送器硬件的各部分电路进行管理，并使变送器能完成最基本的功能，如模拟信号和数字信号的转换、数据通信、变送器自检等功能模块可能有：资源模块变量转换阻尼时间设定模拟输入显示转换量程自动切换运算功能非线性校正·PID 控制功能温度误差校正警报（3）罗斯蒙特3051压力变送器的工作原理3051系列差压变送器是由Fisher-Rosemount公司生产的一种高性能两线制变送器。
3051压力变送器的校验与故障诊断
3051压力变送器的校验与故障诊断怎样使用375HC 对3051系列进行组态调校?3051C或其它压力变送器与375HART手操器的接线:现场可接在表的电源端子处,控制室可接在信号端子处. 回路电阻应保证在250Ω-----1000Ω的范围内.本小册子将分别介绍:1. 基本仪表组态或设定.仪表校验的方法及常见故障分析. 2.375手操器meters village between road hardening, 11 km of pass group Highway, livelihood project; ordered advance XX finished pupils canteen, and wangji alone finished small teaching floor, and wangji alone finished pupils canteen, and ancient Dang "culture tourism features village", and wangji alone village and Bula village River suspension, and Bula village la Los end of pass group Highway, and XX Meters village debris flow disaster control, building project; started has victims will LOS, wood child moving, and autumn baby, pass group highway construction project; solid do "a water two dirt" regulation, and wood added Jia village, XING side fumin, and XX meters village pass village Highway hardening, and ancient Dang village disaster Hou traffic reconstruction, and Bulavillage whole village advance, and day care center, major project of early work. Second, develop eco-agriculture construction of the Canyon. Economic development of eco-agricultural construction in an important position, accelerated "8321" works completed caoguo 23700 acres planted, bubble 4125 acres planted walnuts, sumac 4000 acres planted, Yun Huang Lian 6040 acres planted, tea-oil tree planting 8887.8 acres. Tocultivate new economic growth points, good farmers ' well-off society of the industrial base. Third, start a poverty alleviation project. Storming the headquarters was established, well-organized, well arranged, formation of 7 supporting task force launched the poverty file state cards work in a timely manner, the task force entered the village door communication policy, mobilization mass base, making poverty eradicationplan, and find out about poverty, assist in the implementation of projects1.基本仪表组态或设定.1. 打开电源开关. 等待375进入主菜单画面.2. 使用光标笔双击”HART 应用栏”! 如果手操器与变送器通讯正常,则画面应转入在线画面.此时,双击”仪表设置”即可进入变送器的组态菜单.仪表组态画面有5 个选项:1. 双击”显示过程变量”后, 您可以察看与变送器相关的所有测量参数. meters village between road hardening, 11 km of pass group Highway, livelihood project; ordered advance XX finished pupils canteen, and wangji alone finished small teaching floor, and wangji alone finished pupils canteen, and ancient Dang "culture tourism features village", and wangji alone village and Bula village River suspension, and Bula village la Los end of pass group Highway, and XX Meters village debris flow disaster control, building project; started has victims will LOS, wood child moving, and autumn baby, pass group highway construction project; solid do "a water two dirt" regulation, and wood added Jia village, XING side fumin, and XX meters village pass village Highway hardening, and ancient Dang village disaster Hou traffic reconstruction, and Bulavillage whole village advance, and day care center, major project of early work. Second, develop eco-agriculture construction of the Canyon. Economic development of eco-agricultural construction in an important position, accelerated "8321" works completed caoguo 23700 acres planted, bubble 4125 acres planted walnuts, sumac 4000 acres planted, Yun Huang Lian 6040 acres planted, tea-oil tree planting 8887.8 acres. Tocultivate new economic growth points, good farmers ' well-off society of the industrial base. Third, start a poverty alleviation project. Storming the headquarters was established, well-organized, well arranged, formation of 7 supporting task force launched the poverty file state cards work in a timely manner, the task force entered the village door communication policy, mobilization mass base, making poverty eradicationplan, and find out about poverty, assist in the implementation of projects2. 进入诊断画面,您可以对仪表进行各种校验及回路测试,另外仪表的各项报警也可以查看! 注意!对于3051S高性能变送器, 增加了第6 项:” LCD display config”以便进行现场显示器的组态.此组态可以允许您进行多个参数的循环显示.3. 进入”基本设置”您可以进行修改位号;工程单位;量程及仪表的阻尼系数;传递涵数.因此,这是最常用的菜单. 您可以双击5个选项的任一个进入该菜单!以下是菜单3:请注意: 单击左箭头可以退回上一级菜单, 单击”X” 图标退回主菜单(此时可以关机).meters village between road hardening, 11 km of pass group Highway, livelihood project; ordered advance XX finished pupils canteen, and wangji alone finished small teaching floor, and wangji alone finished pupils canteen, and ancient Dang "culture tourism features village", and wangji alone village and Bula village River suspension, and Bula village la Los end of pass group Highway, and XX Meters village debris flow disaster control, building project; started has victims will LOS, wood child moving, and autumn baby, pass group highway construction project; solid do "a water two dirt" regulation, and wood added Jia village, XING side fumin, and XX meters village pass village Highway hardening, and ancient Dang village disaster Hou traffic reconstruction, and Bula village whole village advance, and day care center, major project of early work. Second, develop eco-agriculture construction of the Canyon. Economic development of eco-agricultural construction in an important position, accelerated "8321" works completed caoguo 23700 acres planted,bubble 4125 acres planted walnuts, sumac 4000 acres planted, Yun Huang Lian 6040 acres planted, tea-oil tree planting 8887.8 acres. Tocultivate new economic growth points, good farmers ' well-off society of the industrial base. Third, start a poverty alleviation project. Storming the headquarters was established, well-organized, well arranged, formation of 7 supporting task force launched the poverty file state cards work in a timely manner, the task force entered the village door communication policy, mobilization mass base, making poverty eradication plan, and find out about poverty, assist in the implementation ofprojects单击”HOME”退回在线菜单(Online, 此菜单为实时参数更新画面)3-1: 修改单位:双击”单位”进入修改工程单位子菜单:使用光笔单击所选定的单位,然后单击”ENTER”,这时候会出现一个提示,告诉你当前过程变量在该选定单位尚未发送至变送器之前仍然为原单位,提示你应在下随菜单中进行发送(SEND).因此,见到提示后,即按OK 则出现下随菜单:此时单击”SEND”并在见到提示后,按OK,修该后的单位即下装到变送器中.meters village between road hardening, 11 km of pass group Highway, livelihood project; ordered advance XX finished pupils canteen, and wangji alone finished small teaching floor, and wangji alone finished pupils canteen, and ancient Dang "culture tourism features village", and wangji alone village and Bula village River suspension, and Bula village la Los end of pass group Highway, and XX Meters village debris flow disaster control, building project; started has victims will LOS, wood child moving, and autumn baby, pass group highway construction project; solid do "a water two dirt" regulation, and wood added Jia village, XING side fumin, and XX meters village pass village Highway hardening, and ancient Dang village disaster Hou traffic reconstruction, and Bula village whole village advance, and day care center, major project of early work. Second, develop eco-agriculture construction of the Canyon. Economic development of eco-agricultural construction in an important position, accelerated "8321" works completed caoguo 23700 acres planted, bubble 4125 acres planted walnuts, sumac 4000 acres planted, Yun HuangLian 6040 acres planted, tea-oil tree planting 8887.8 acres. Tocultivate new economic growth points, good farmers ' well-off society of the industrial base. Third, start a poverty alleviation project. Storming the headquarters was established, well-organized, well arranged, formation of 7 supporting task force launched the poverty file state cards work in a timely manner, the task force entered the village door communication policy, mobilization mass base, making poverty eradication plan, and find out about poverty, assist in the implementation ofprojects最后见提示单击OK 完成该操作.(注意,单位Unit左上角”*”在发送成功后,应消失!)如何对3051S 系列仪表进行自定义工程单位修改? 该新型仪表具有可自定义单位功能(Scaled Variable),并使其和模头压力值进行组态对应,同时进行切除及传递涵数的定义.此时的组态画面有所不同:需要进入4:DETAILED SETUP/详细设置菜单进行自定义单位的设置:选择3 /输出处理.然后选择4 /Scaled Variable/自定义变量设置,见下图:第6项功能是进行多变量的组态,您可以通过这一个组态将任一变量指定为4-20MA输出!meters village between road hardening, 11 km of pass group Highway, livelihood project; ordered advance XX finished pupils canteen, and wangji alone finished small teaching floor, and wangji alone finished pupils canteen, and ancient Dang "culture tourism features village", and wangji alone village and Bula village River suspension, and Bula villagela Los end of pass group Highway, and XX Meters village debris flow disaster control, building project; started has victims will LOS, wood child moving, and autumn baby, pass group highway construction project; solid do "a water two dirt" regulation, and wood added Jia village, XING side fumin, and XX meters village pass village Highway hardening, and ancient Dang village disaster Hou traffic reconstruction, and Bulavillage whole village advance, and day care center, major project of early work. Second, develop eco-agriculture construction of the Canyon. Economic development of eco-agricultural construction in an important position, accelerated "8321" works completed caoguo 23700 acres planted, bubble 4125 acres planted walnuts, sumac 4000 acres planted, Yun Huang Lian 6040 acres planted, tea-oil tree planting 8887.8 acres. Tocultivate new economic growth points, good farmers ' well-off society of the industrial base. Third, start a poverty alleviation project. Storming the headquarters was established, well-organized, well arranged, formation of 7 supporting task force launched the poverty file state cards work in a timely manner, the task force entered the village door communication policy, mobilization mass base, making poverty eradication plan, and find out about poverty, assist in the implementation ofprojects在Scaled Variable 下,选择7.可定义变量组态,进入该菜单后,利用引导提示和触屏键盘(类似于3051C的修改量程方法),你可以输入你所自定义的工程单位.同时可以组态该输出单位的范围及传递涵数(即线性或开方输出);切除值.为进一步确认组态的正确与否,可在上面的屏幕上进行检查,其中,进入1(可定义变量的压力对应值)可以看到模头差压与流量或液位的关系.meters village between road hardening, 11 km of pass group Highway, livelihood project; ordered advance XX finished pupils canteen, and wangji alone finished small teaching floor, and wangji alone finished pupils canteen, and ancient Dang "culture tourism features village", and wangji alone village and Bula village River suspension, and Bula village la Los end of pass group Highway, and XX Meters village debris flow disaster control, building project; started has victims will LOS, wood child moving, and autumn baby, pass group highway construction project; solid do "a water two dirt" regulation, and wood added Jia village, XING side fumin, and XX meters village pass village Highway hardening, and ancient Dang village disaster Hou traffic reconstruction, and Bulavillage whole village advance, and day care center, major project of early work. Second, develop eco-agriculture construction of the Canyon. Economic development of eco-agricultural construction in an important position, accelerated "8321" works completed caoguo 23700 acres planted, bubble 4125 acres planted walnuts, sumac 4000 acres planted, Yun Huang Lian 6040 acres planted, tea-oil tree planting 8887.8 acres. Tocultivate new economic growth points, good farmers ' well-off society of the industrial base. Third, start a poverty alleviation project. Storming the headquarters was established, well-organized, well arranged, formation of 7 supporting task force launched the poverty file state cards work in a timely manner, the task force entered the village door communication policy, mobilization mass base, making poverty eradicationplan, and find out about poverty, assist in the implementation of projects3-2: 修改量程:在基本设置中,用光标笔选中”3 量程”并双击,则进入量程修改菜单.在此菜单中,有两种修改方式.1. 直接键盘输入.这是最方便的方式.2. 提供标准压力值并将该压力确认为4 或20MA的设定点. 下面,为直接键盘输入方式:双击选项1.一般来说,如不做迁移,则只需修改量程上限.因此,双击”URV”进入键盘画面.meters village between road hardening, 11 km of pass group Highway, livelihood project; ordered advance XX finished pupils canteen, and wangji alone finished small teaching floor, and wangji alone finished pupils canteen, and ancient Dang "culture tourism features village", and wangji alone village and Bula village River suspension, and Bula village la Los end of pass group Highway, and XX Meters village debris flow disaster control, building project; started has victims will LOS, wood child moving, and autumn baby, pass group highway construction project; solid do "a water two dirt" regulation, and wood added Jia village, XING side fumin, and XX meters village pass village Highway hardening, and ancient Dang village disaster Hou traffic reconstruction, and Bulavillage whole village advance, and day care center, major project of early work. Second, develop eco-agriculture construction of the Canyon. Economic development of eco-agricultural construction in an important position, accelerated "8321" works completed caoguo 23700 acres planted, bubble 4125 acres planted walnuts, sumac 4000 acres planted, Yun Huang Lian 6040 acres planted, tea-oil tree planting 8887.8 acres. Tocultivate new economic growth points, good farmers ' well-off society of the industrial base. Third, start a poverty alleviation project. Storming the headquarters was established, well-organized, well arranged, formation of 7 supporting task force launched the poverty file state cards work in a timely manner, the task force entered the village door communication policy, mobilization mass base, making poverty eradicationplan, and find out about poverty, assist in the implementation of projects您可以使用光笔,点击数字键直接输入希望修改的量程.然后点击”ENTER”确认.当返回上一级菜单后,单击”SEND”进行发送!见下图.(URV左上角*号表示该参数尚未发送!)发送后,有两个提示,请单击OK 确认即可!请按左键返回基本设置菜单(BASIC SETUP)进行下一步!meters village between road hardening, 11 km of pass group Highway, livelihood project; ordered advance XX finished pupils canteen, and wangji alone finished small teaching floor, and wangji alone finished pupils canteen, and ancient Dang "culture tourism features village", and wangji alone village and Bula village River suspension, and Bula village la Los end of pass group Highway, and XX Meters village debris flow disaster control, building project; started has victims will LOS, wood child moving, and autumn baby, pass group highway construction project; solid do "a water two dirt" regulation, and wood added Jia village, XING side fumin, and XX meters village pass village Highway hardening, and ancient Dang village disaster Hou traffic reconstruction, and Bulavillage whole village advance, and day care center, major project of early work. Second, develop eco-agriculture construction of the Canyon. Economic development of eco-agricultural construction in an important position, accelerated "8321" works completed caoguo 23700 acres planted, bubble 4125 acres planted walnuts, sumac 4000 acres planted, Yun Huang Lian 6040 acres planted, tea-oil tree planting 8887.8 acres. Tocultivate new economic growth points, good farmers ' well-off society of the industrial base. Third, start a poverty alleviation project. Storming the headquarters was established, well-organized, well arranged, formation of 7 supporting task force launched the poverty file state cards work in a timely manner, the task force entered the village door communication policy, mobilization mass base, making poverty eradicationplan, and find out about poverty, assist in the implementation of projects3-3 :如何修改阻尼值?其方法和修改的量程方法一样. 此参数出厂设定为0.4秒!2-1.在基本设置中,选项2 是专门针对仪表的调校及故障诊断设置的.一般地说,变送器完成现场安装后,须进行读数的清零. 此功能在375 菜单中称之为:”ZERO RTIM”.以下为进入和完成该功能的步骤:由主菜单双击”仪表设置”即可进入上面的菜单.选中2 并双击,则进入诊断及服务子菜单. (见上图)meters village between road hardening, 11 km of pass group Highway, livelihood project; ordered advance XX finished pupils canteen, and wangji alone finished small teaching floor, and wangji alone finished pupils canteen, and ancient Dang "culture tourism features village", and wangji alone village and Bula village River suspension, and Bula village la Los end of pass group Highway, and XX Meters village debris flowdisaster control, building project; started has victims will LOS, wood child moving, and autumn baby, pass group highway construction project; solid do "a water two dirt" regulation, and wood added Jia village, XING side fumin, and XX meters village pass village Highway hardening, and ancient Dang village disaster Hou traffic reconstruction, and Bulavillage whole village advance, and day care center, major project of early work. Second, develop eco-agriculture construction of the Canyon. Economic development of eco-agricultural construction in an important position, accelerated "8321" works completed caoguo 23700 acres planted, bubble 4125 acres planted walnuts, sumac 4000 acres planted, Yun Huang Lian 6040 acres planted, tea-oil tree planting 8887.8 acres. Tocultivate new economic growth points, good farmers ' well-off society of the industrial base. Third, start a poverty alleviation project. Storming the headquarters was established, well-organized, well arranged, formation of 7 supporting task force launched the poverty file state cards work in a timely manner, the task force entered the village door communication policy, mobilization mass base, making poverty eradication plan, and find out about poverty, assist in the implementation ofprojects选中3 并双击,弹出下面的菜单.选中3 并双击,弹出下面的菜单:meters village between road hardening, 11 km of pass group Highway, livelihood project; ordered advance XX finished pupils canteen, and wangji alone finished small teaching floor, and wangji alone finished pupils canteen, and ancient Dang "culture tourism features village", and wangji alone village and Bula village River suspension, and Bula village la Los end of pass group Highway, and XX Meters village debris flow disaster control, building project; started has victims will LOS, wood child moving, and autumn baby, pass group highway construction project;solid do "a water two dirt" regulation, and wood added Jia village, XING side fumin, and XX meters village pass village Highway hardening, and ancient Dang village disaster Hou traffic reconstruction, and Bulavillage whole village advance, and day care center, major project of early work. Second, develop eco-agriculture construction of the Canyon. Economic development of eco-agricultural construction in an important position, accelerated "8321" works completed caoguo 23700 acres planted, bubble 4125 acres planted walnuts, sumac 4000 acres planted, Yun Huang Lian 6040 acres planted, tea-oil tree planting 8887.8 acres. Tocultivate new economic growth points, good farmers ' well-off society of the industrial base. Third, start a poverty alleviation project. Storming the headquarters was established, well-organized, well arranged, formation of 7 supporting task force launched the poverty file state cards work in a timely manner, the task force entered the village door communication policy, mobilization mass base, making poverty eradication plan, and find out about poverty, assist in the implementation ofprojects选择1 并双击.然后点击OK.对两个提示进行确认,注意, 此项校准应确认在控制系统处于手动状态下进行并变送器处于零差压/压力下进行,绝压表不能进行此项操作.接下来,375将提示仪表应确认处于零点压力状态!即应该在现场操作人员配合下进行压力平衡或放空操作. 确认完成上述工作后,点击OK. 见下图:接下来的提示, 告诉您仪表需确认零点读数的稳定, 然后,点击OK 结束操作.meters village between road hardening, 11 km of pass group Highway, livelihood project; ordered advance XX finished pupils canteen, and wangji alone finished small teaching floor, and wangji alone finished pupils canteen, and ancient Dang "culture tourism features village", and wangji alone village and Bula village River suspension, and Bula village la Los end of pass group Highway, and XX Meters village debris flow disaster control, building project; started has victims will LOS, wood child moving, and autumn baby, pass group highway construction project; solid do "a water two dirt" regulation, and wood added Jia village, XING side fumin, and XX meters village pass village Highway hardening, andancient Dang village disaster Hou traffic reconstruction, and Bulavillage whole village advance, and day care center, major project of early work. Second, develop eco-agriculture construction of the Canyon. Economic development of eco-agricultural construction in an important position, accelerated "8321" works completed caoguo 23700 acres planted, bubble 4125 acres planted walnuts, sumac 4000 acres planted, Yun Huang Lian 6040 acres planted, tea-oil tree planting 8887.8 acres. Tocultivate new economic growth points, good farmers ' well-off society of the industrial base. Third, start a poverty alleviation project. Storming the headquarters was established, well-organized, well arranged, formation of 7 supporting task force launched the poverty file state cards work in a timely manner, the task force entered the village door communication policy, mobilization mass base, making poverty eradication plan, and find out about poverty, assist in the implementation ofprojects最后的操作,应单击”HOME”键返回在线显示. 此时,PV 值应为零点值并且AO( 4-20MA)应为4.00MA.如PV 仍有误差,可再进行一次.如PV 正确,但4.00MA 有误差,则需进行校验菜单的第2 项- Trim analog output/校准模拟量输出.以下为操作菜单:双击选项1,确认系统处于手动状态,并将标准电流表串入变送器回路然后点击OK 3 次.进入编辑菜单.meters village between road hardening, 11 km of pass group Highway, livelihood project; ordered advance XX finished pupils canteen, and wangji alone finished small teaching floor, and wangji alone finished pupils canteen, and ancient Dang "culture tourism features village", and wangji alone village and Bula village River suspension, and Bula village la Los end of pass group Highway, and XX Meters village debris flow disaster control, building project; started has victims will LOS, wood child moving, and autumn baby, pass group highway construction project; solid do "a water two dirt" regulation, and wood added Jia village, XING side fumin, and XX meters village pass village Highway hardening, and ancient Dang village disaster Hou traffic reconstruction, and Bula village whole village advance, and day care center, major project ofearly work. Second, develop eco-agriculture construction of the Canyon. Economic development of eco-agricultural construction in an important position, accelerated "8321" works completed caoguo 23700 acres planted, bubble 4125 acres planted walnuts, sumac 4000 acres planted, Yun Huang Lian 6040 acres planted, tea-oil tree planting 8887.8 acres. Tocultivate new economic growth points, good farmers ' well-off society of the industrial base. Third, start a poverty alleviation project. Storming the headquarters was established, well-organized, well arranged, formation of 7 supporting task force launched the poverty file state cards work in a timely manner, the task force entered the village door communication policy, mobilization mass base, making poverty eradication plan, and find out about poverty, assist in the implementation ofprojects使用光笔点击数字键,输入标准表的读数,例如:4.025MA.点击ENTER确认.接下来的提示将问你此时的输出是否与标准表一致.如一致,则选1/Yes. 如不一致,则需重做,选2/No.下一步,将对20MA点进行相同的校准.孰不重复. 最后,使用HOME 键退回在线菜单即可.注意:为确保手操器与现场仪表通讯正常,请确认回路负载电阻为250-1000欧姆,且对大多数变送器来说,输出端应保证4MA /12V 的供电.(基本能量) 如果变送器回路电缆受到强电干扰(例如与供电系统共用穿线管,则可能引起通讯问题.或回路电缆单端对地绝缘不良等).在有强干扰情况下,(例如有大功率变频器)应特别注意仪表的接地.meters village between road hardening, 11 km of pass group Highway, livelihood project; ordered advance XX finished pupils canteen, and wangji alone finished small teaching floor, and wangji alone finished pupils canteen, and ancient Dang "culture tourism features village", and wangji alone village and Bula village River suspension, and Bula village la Los end of pass group Highway, and XX Meters village debris flow disaster control, building project; started has victims will LOS, wood child moving, and autumn baby, pass group highway construction project; solid do "a water two dirt" regulation, and wood added Jia village, XING side fumin, and XX meters village pass village Highway hardening, and ancient Dang village disaster Hou traffic reconstruction, and Bula village whole village advance, and day care center, major project of early work. Second, develop eco-agriculture construction of the Canyon. Economic development of eco-agricultural construction in an important position, accelerated "8321" works completed caoguo 23700 acres planted, bubble 4125 acres planted walnuts, sumac 4000 acres planted, Yun Huang Lian 6040 acres planted, tea-oil tree planting 8887.8 acres. Tocultivate new economic growth points, good farmers ' well-off society of the industrial base. Third, start a poverty alleviation project. Storming the headquarters was established, well-organized, well arranged, formation of 7 supporting task force launched the poverty file state cards work in a timely manner, the task force entered the village door communication policy, mobilization mass base, making poverty eradication plan, and find out about poverty, assist in the implementation ofprojects2.仪表校验的方法及常见故障分析.2-1.* 压力变送器效验的基本条件:通常,仪表校验应在试验台上正常环境温度下进行.所使用的标准压力源的参考精度至少为被测表的3-4倍.电流标准应使用3位半以上的数字万用表.除此以外,275/375 HART 手操器是必备工具.2-2.* 什么情况需要进行校验:常见的故障大致为:1. 仪表PV值与实际压力不一致.2. 仪表PV值与实际压力一致,但4-20MA 输出与标准表不一致.上述两个参数均对不上. 3.以下分别针对这些问题进行分析解决.3051C型仪表是智能化变送器,感压膜头的信号首先通过A/D转换,接着由内部数据处理器将该信号通过标定曲线再转换为用户组态的压力变量(即PV值)进行显示.最后经D/A转换形成4-20MA输出.当我们用手操器进行膜头校验时,实质上是对上述曲线进行矫正.我们称为: SENSOR TRIM!FULL TRIM 及ZERO TRIM 等.通常,这些操作菜单都在 SENSOR TRIM 下,具体选FULL TRIM 还是 ZERO TRIM 要看具体误差的情况.但是,不同的变送器对曲线的矫正度有不同的限制,通常为满量程的3-5%!A. 使用ZERO TRIM,如果仪表在安装结束后,处于零点状态,或差压表虽为平衡状态,但管道内有静压,此时仪表的输出会有很小的偏差(0.25-0.31Kpa)视安装位置及仪表类型而不同,此时应使用ZERO TRIM进行矫正.这种操作仅对标定曲线进行平移,并不影响斜率,因此是针对D/A的单点校验.如果用户手头没有HART手操器,而且仪表本身具有外部零点调整按钮,此项矫正也可以通过激活(按住2秒以上)该外部按钮完成.所不同的是,这种操作只将当前的零位PV值调整为4MA,压力的读数并不改变!相当于进行了一次微量零点迁移.B. 使用FULL TRIM,此项调整为两点校验,需标准压力源进行打压,因此只能在离线情况下进行.此项操作为针对膜头内部A/D的校正.meters village between road hardening, 11 km of pass group Highway, livelihood project; ordered advance XX finished pupils canteen, andwangji alone finished small teaching floor, and wangji alone finished pupils canteen, and ancient Dang "culture tourism features village", and wangji alone village and Bula village River suspension, and Bula village la Los end of pass group Highway, and XX Meters village debris flow disaster control, building project; started has victims will LOS, wood child moving, and autumn baby, pass group highway construction project; solid do "a water two dirt" regulation, and wood added Jia village, XING side fumin, and XX meters village pass village Highway hardening, andancient Dang village disaster Hou traffic reconstruction, and Bulavillage whole village advance, and day care center, major project of early work. Second, develop eco-agriculture construction of the Canyon. Economic development of eco-agricultural construction in an important position, accelerated "8321" works completed caoguo 23700 acres planted, bubble 4125 acres planted walnuts, sumac 4000 acres planted, Yun Huang Lian 6040 acres planted, tea-oil tree planting 8887.8 acres. Tocultivate new economic growth points, good farmers ' well-off society of the industrial base. Third, start a poverty alleviation project. Storming the headquarters was established, well-organized, well arranged, formation of 7 supporting task force launched the poverty file state cards work in a timely manner, the task force entered the village door communication policy, mobilization mass base, making poverty eradication plan, and find out about poverty, assist in the implementation ofprojects进行这一操作,必须先进行低端调整(Low sensor trim)再进行高端(Upper sensorTrim).进行FULL TRIM 以后,仪表的标定曲线完成了拟合.进入膜头校验菜单后(见下图)选中2,或直接按2键即可进入操作!。
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3051压力变送器的常见故障及排除
3051压力变送器广泛应用于各种工业自控环境，涉及水利水电、铁路交通、智能建筑、生产自控、航空航天、军工、石化、油井、电力、船舶、机床、管道等众多行业，下面就简单介
绍一些常用变送器的常见故障及排除方法。
压力变送器的常见故障及排除
1)压力上去，变送器输出上不去加压变送器输出不变化，再加压变送器输出突然变化，泄
压变送器零位回不去。
这种情况应检查压力接口是否漏气或者被堵住，在检查接线方式和电源，如果正常再察看传感器零位是否有输出，或者进行简单加压看输出是否变化，有变化证明传感器没有损坏，如果无变化传感器即已经损坏。
最后在考虑还可能是仪表损坏，或者整个系统的其他环节的问题。
2)3051压力变送器输出信号不稳
出现这种情况应考虑A.压力源本身是一个不稳定的压力B.仪表或压力传感器抗干扰能力不强C.传感器接线不牢D.传感器本身振动很厉害E.传感器故障
3)加压变送器输出不变化，再加压变送器输出突然变化，泄压变送器零位回不去,检查传感器器密封圈，一般是因为密封圈规格原因(太软或太厚)，传感器拧紧时，密封圈被压缩到传感器引压口里面堵塞传感器，加压时压力介质进不去，但是压力很大时突然冲开密封圈，压力传感器受到压力而变化，而压力再次降低时，密封圈又回位堵住引压口，残存的压力释放不出，因此传感器零位又下不来。
排除此原因方法是将传感器卸下看零位是否正常，如果正常更换密
封圈再试。
4)3051压力变送器接电无输出
a)接错线(仪表和传感器都要检查)
b)导线本身的断路或短路
c)电源无输出或电源不匹配
d)仪表损坏或仪表不匹配
e)传感器损坏
5)3051压力变送器的误差
确认正常误差范围的方法：计算出压力表的误差值例如：压力表量程为30bar，精度1.5%，最小刻度为0.2bar 正常的误差为：30bar*1.5%+ 0.2*0.5(视觉误差)=0. 55bar 压力变送器的误
差值。
总体来说对3051压力变送器在使用过程中出现的一些故障分析和处理主要由以下几种方
法。
a)替换法：准备一块正常使用的3051压力变送器直接替换怀疑有故障的这样可以简单快捷
的判定是3051压力变送器本身的故障还是管路或其他设备的故障。
b)断路法：将怀疑有故障的部分与其它部分分开来，查看故障是否消失，如果消失，则确定故障所在，否则可进行下一步查找，如：智能差压变送器不能正常Hart远程通讯，可将电源从仪表本体上断开，用现场另加电源的方法为变送器通电进行通讯，以查看是否电缆是否叠加
约2kHz的电磁信号而干扰通讯。
c)短路检测：在保证安全的情况下，将相关部分回路直接短接，如：差变送器输出值偏小，可将导压管断开，从一次取压阀外直接将差压信号直接引到差压变送器双侧，观察变送器输出，
以判断导压管路的堵、漏的连通性。