传感器在金属管道上安装（金属管道内壁没有绝缘涂层），按下图接地，传感器在塑料管道上或在有绝缘衬里的管道上安装,传感器的两端应安装接地环、或接地法兰、或带有接地电极的短管,按下图接地。使管内流动的被测介质与大地短路,具有零电位，否则，电磁流量计无法正常工作。近年来随着纺织机械机电一体化技术水平的不断提高，交流变频调速已成一种趋势。在大多数新开发的纺织机械产品中几乎无一例外地应用了交流异步电动机变频调速装置。 fs20r06ve3-b2 只要在gppw软件的配置菜单中，设置相应的参数，远程i/o信号就可自动刷新到cpu内存，还能自动设置cc-link远程元件的初始参数，如果整个cc-link现场总线系统是由q系列和64个远程i/o模块构成的，甚至不须设置参数即可自动完成通信设置的初试化。
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铸铁机是小高炉炼铁工艺的最后一到工序，从高炉流出来的铁水经铁水罐车运到铸铁机，经循环，水喷淋冷却出成品面包铁。铸铁机是倾斜30度的链条轨道，轨道上固定着面包铁模具。随着链条轨道循环滚动天车将铁水罐缓慢倾斜, 铁水罐内铁水流到面包铁模具内，穿过循环水喷淋冷却区，铁水冷却形成成品面包铁。 为便于维修工作的开展，有些plc制造商提供维修用的专用仪表或设备，提供故障维修树等维修用资料；有些厂商还提供维修用的智能卡或插件板，使维修工作变得十分方便。此外，plc的面板和结构设计也考虑了维修的方便性。例如，对需要维修的部件设置在便于维修的位置，信号灯设置在易于观察的位置，接线端子采用便于接线和更换的类型等，这些设计使维修工作能方便地进行，大大缩短了维修时间。采用标准化元件和标准化工艺生产流水作业，使维修用备品备件简化等，也使维修工作变得方便。 根据仪器仪表行业的预测，“十五”期间我国仪器仪表市场大致是：2002年1628亿，2003年1790亿，2004年1969亿，2005年2165亿。五年间，平均年市场容量为1806亿（相当于220亿美元），其中工业自动化仪表和控制系统占41%、科学测试仪器占25%、医疗仪器占17%、其它占17%，平均年增长率将不会低于10%。 fs20r06ve3-b2 我国大坝电厂、井冈山电厂就发生过因和应涌流导致差动保护误动作跳机事故。究其原因，主要是因为当时机组厂用电系统处于非正常运行方式，差动保护动作值整定的相对较小，变压器空载合闸时差动保护因和应涌流而误动。井冈山电厂变压器差动保护动作值为1.330a，最小制动电流3.716a(整定值为最小动作电流为1.295a，最小制动电流3.676a)，从差动保护动作值分析，只要适当抬高差动保护定值，就有可能避免这类事故。
1mbi600np-060-03 智能化管理系统(1bms／bms)首先是一体化的集成管理、监控的实时系统，能够实现大厦内所有信息资源的采集、监视和共享。通过系统对信息的整理、优化、判断，给大厦的各部门、各级别管理人员，提供决策的依据和执行控制与管理的自动化，给大厦的使用者提供安全、舒适、快捷的优质服务。fs20r06ve3-b2 模拟信号的输入：信号与地之间应加钽电容滤波，其电容的量值以限度的滤除谐波为。可用示波器观察滤波效果，采用一台或两台变频器互为备用的方式，应视设备的重要程度而定。根据实践：上料车应选用两台互为备用方案。其转换操作应简洁、可靠、准确互不影响。
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fs20r06ve3-b2 油田数据采集系统的需求，为实现油田生产的监控，生产调度中心需要实时得到各站的压力、温度、流量等数据，从而进行数据分析，得到生产能耗指标情况和生产运行状况，如对于长距离输油管道，就需要实时得到管道进出口的压力数据，由泄漏监测报警系统软件即可进行泄漏报警和泄漏点的定位，简短地说，数据采集系统主要包括数据采集与通信两个方面的内容。， 反冲洗自动控制系统的输入信号主要有上位机操作台和触摸屏的控制输入及阀位开关反馈信号。共有开关量（di）120个输入点。plc系统的控制负载主要包括调节阀控制、搅拌器启/停、变频器控制负载,共有开关量（do）270个输出点，模拟量（ao）2个输出点。