西门子超声波液位计THE PROBE

超声波液位计的常见故障及解决方案超声波液位计是一种常用的液位检测仪器，可广泛应用于化工、石油、食品、制药等行业中的液位监测和控制。

然而，由于使用场合和工作环境的不同，超声波液位计也会遇到一些常见故障。

本文将介绍超声波液位计的常见故障及解决方案。

1. 测量距离不准确或不稳定超声波液位计的使用距离受到多种因素的制约，如液位高度、温度、液体表面状态、物体密度等。

因此，当设备进行测量时，可能会出现距离不准确或不稳定的情况。

解决方案：•检查超声波液位计是否被杂物阻挡，清除杂物。

•调整超声波液位计发射和接收的时间差，让超声波的反射时间与测量距离相匹配。

•检查液位计传感器的位置是否正确，调整传感器的位置，避免其受到干扰。

2. 噪声干扰因为超声波液位计需要反射回来的声波进行测量，某些因素，如风扇、机器振动、设备本身的噪声，可能会对声波造成干扰，导致测量值不准确。

解决方案：•确保超声波液位计的定位稳固，不受外力的影响。

•检查设备的环境是否太吵，可以考虑增加隔音措施。

•选择带有抗干扰功能的超声波液位计，如在测量时仅考虑相关的回声，过滤掉不相关的信号。

3. 电源故障超声波液位计的工作需要电源供应，如果电源出现问题，将无法正常工作。

解决方案：•检查电源线是否连接紧密，插头是否锁定。

•建议连接不间断电源设备，确保设备有稳定的电源供应。

•联系设备生产商检查是否有其他电源故障。

4. 信号操作不稳定或无法正常传输信号操作不稳定或无法正常传输会导致超声波液位计无法正确读取并传输数据。

解决方案：•检查连接是否正确，信号线是否破损。

•调整电源电压，以保证设备稳定工作。

•联系设备生产商检查是否有其他信号操作故障。

5. 清洗和维护超声波液位计常年暴露在恶劣的环境下，需要定期进行清洗和维护。

解决方案：•每3-6个月进行一次清洗和维护。

•清洗前关闭电源，可使用干净的布或棉签轻轻擦拭超声波液位计的表面，避免使用清洗剂或化学药品。

•保持设备的周围环境干燥，防止潮湿或霉菌侵害。

西门子超声波液位计说明书连续测量 - 一体化液位变送器SITRANS Probe LU■ 概述■ 组态SITRANSProbe LU 二线制回路供电超声波变送器，测量储罐和简单过程容器中液体的液位、体积，同时也可用于明渠测量。

■ 产品特点连续液位测量，测量范围可达 12 m ? 易于安装，启动简单 ? 通过红外线本安手持编程器，SIMATIC PDM 或 HART? 手操器编程 ? 独一无二的高精度 ? 使用 HART 或 PROFIBUS PA 进行通讯 ? ETFE 或PVDF 传感器抗化学腐蚀能力强? 带专利的声智能回波处理技术? 极高的信 / 噪比 ? 对于固定干扰目标自动虚假回波抑制■ 应用SITRANS Probe LU 是供水和水处理行业和化工储罐液位测量的最佳解决方案。

SITRANS Probe LU 量程为 6m 或 12m。

使用自动虚假回波抑制技术可避免固定物体的影响，提高信/ 噪比，使精度到达量程的0.15% 或6mm，Probe LU 可提供很高的可靠性。

SITRANS Probe LU 内置了经过无数现场实践证明的声智能? 回波处理技术，结合了新的回波处理特性和最新的微处理器和通讯技术。

Probe LU 提供两种通讯选件：HART 或 PROFIBUS PA (3.0 型， B级) Probe LU 的传感器为 ETFE 或 PVDF 材质，可抗化学腐蚀。

另外，对于材料和过程温度变化的应用， Probe LU 还集成一个内置传感器，以补偿温度变化。

? 主要应用：化学储罐，滤池，液体储罐SITRANS Probe LU 安装8连续测量 - 一体化液位变送器SITRANS Probe LU■ 技术规格操作模式测量原理典型应用输入测量范围 ? 6m 型 ? 12 m 型频率输出 mA/HART ? 范围 ? 精度 PROFIBUS PA 性能分辨率精度重复性盲区刷新时间 ? 4/20 mA/HART 型 ? PROFIBUS 型温度补偿波束角额定工作条件 ? 环境条件 - 地点 - 环境温度 - 相对湿度 / 入口保护 - 安装等级 - 污染等级 ? 介质条件 - 法兰或螺纹处温度 - 压力（容器）设计外壳材质防护等级重量电缆入口传感器 (2 个选件 ) 过程连接 ? 螺纹连接 ? 法兰连接 ? 其它连接 2" NPT， BSP 或 G/PF 3" 通用法兰（见 60 页 ) 或用 FMS200 安装套件户提供的安装套件 PBT （聚对苯二甲酸丁二醇酯）Type 4X/NEMA 4X, Type 6/NEMA 6/IP67/IP68 外壳 2.1 kg 2 x M20 x 1.5 电线接头或 2 x?" NPT 螺纹ETFE 或 PVDF -40 ~ +85 °C 0.5 bar 室内 / 室外 -40 ~ +80 °C 适于室外I 4 ≤ 3 mm 量程的 0.15% 或 6mm，取其较大值≤ 3 mm 0.25 m ≤ 5s ≤ 5s，4mA ≤ 4s， 15 mA 电流回路整个温度范围内的补偿功能10 ° 4 ~ 20 mA ± 0.02 mA 型式 3 ， B 级 0.25 ~ 6m 0.25 ~ 12m 54 KHz 超声波液位测量测量储罐和简单过程容器的液位显示和控制接口组态本地：LCD 带棒状图远程：通过 HART 或Profibus PA 使用西门子 SIMATIC PDM 软件（PC 机）或 HART 手操器或西门子红外线手操器 EEPROM 可在断电时保持信息，无需备用电池额定 24VDC， 550? 最大，最大 30 V DC 4 ~ 20 mA 12，13， 15 或 20 mA 取决于组态（一般用途或本安型）符合标准 IEC 61158-2 认证总则船用（只应用于 HART 通讯选件）危险区 ? 本安（欧洲） ? 本安（美国 / 加拿大 ) ATEX II 1G EEx ia IIC T4 FM/CSA （需安全栅） T4， I 类， 1 区， A ， B， C， D，组； II 类， E， F，G，组； III 类； FM ( 无需安全栅 ) T5：I 类， 2 区， A， B， C 和 D 组红外手操器具有 ATEX EEx ia IIC T4 的 IS 模件 FM/CSA I 类，1 区，A，B ，C，D 组 -20 ~ +40 °C 专有红外脉冲信号 3V 锂电池（不可换） CSAUS /C ， FM， CE ? 英国劳氏船用认证 ? ABS 形式认证存储器电源 4 ~ 20 mA/HARTPROFIBUS PA非易燃（美国）编程 ? 本安西门子红外手操器 - 用于红外手操器的认证 ? 环境温度 ? 接口 ? 功率9连续测量 - 一体化液位变送器SITRANS Probe LU选型和订货数据 SITRANS Probe LU 2 线制回路供电超声波变送器，用于测量液体的液位、体积和流量外壳塑料(PBT)，Qty 2 x M20 x 1.5 塑料 (PBT)， Qty 2 x 1/2"NPT 量程 / 传感器材质 6 m，ETFE 6 m， PVDF 共聚物 12 m， ETFE 12 m， PVDF 共聚物过程连接 2" NPT (ASME/ASME B1.20.1) 2" BSPT (EN 10226-1) 2” G (EN ISO 228-1) / PF2 (JIS B 0202) 通讯/ 输出4 ~ 20 mA，HART PROFIBUS PA 认证一般用途， FM， CSA ， CE 本安，FM I 类，1 区， A、B、C、D 组 ( 需安全栅 ); II 类， 1 区， E， F， G 组； III 类； ATEX II 1G EEx ia IIC T4 （仅 HART 模件）本安，CSA I 类，1 区， A，B ，C，D 组 ( 需安全栅 ); II 类， 1 区， G 组； III 类（仅HART 模件） FM， l 类， 2 区（只外壳选件 2 ）本安，FM/CSA I 类，1 区， A，B，C，D 组（需安全栅）； II 类， 1 区， E、 F、 G 组； III 类（仅 PROFIBUS PA 模件）本安， ATEX II 1G EEx ia IIC T4 （仅 PROFIBUS PA 模件） 1)C)订货号7 ML 5 2 2 1 ■■■■■选型和订货数据其它设计请在订货号上加“-Z”并规定订货代码不锈钢标牌：测量点数 / 识别（最多 16 个字符）订货号Y151 2 A B C D A B C 1 2 1 2 3 4 5 6用于 HART/mA 设备的使用手册 C) 7ML1998-5HT01 英文版注意：使用手册在订货中要单独订货。

sitrans lr一体结构聚丙烯天线可以抗强化腐蚀，可用于测量硫酸、盐酸、醋酸及液氨等介质。

℃。

专利的红外本安手持编程器，可对SITRANS LR进行操作，无须打开仪表外壳，甚至在有防爆要求的场合也能使用。

使用太阳能长效电池，可保证长期使用。

平面法兰，杆式天线，整体密封带屏蔽杆式天线可消除卫生型天线用于食品制波导天线用于低介电常数介质平面法兰JIS 喇叭天线，用于隔离高温，* >SITRANS LR 200>SITRANS LR 300″用本安红外手持编程器对SITRANS LR400进行设定信号(db)来自搅拌器的回波物料表面回波距离14SITRANS LR 300喇叭型天线订货数据订货号7ML5411--12ABCDEFGHJKABCDEFGHJKABCDEAAAAABBBBBCCCCCDDDDDEEEEE112123ABCDEFGHJKLMNPQRS1ADEFGHJ订货数据订货号SITRANS LR 300喇叭型天线用先进的脉冲雷达技术对液体和浆体提供可靠的液位测量，最大量程20m天线材质・316L S.S带PTFE锥形发射器・316L S.S带PTFE锥形发射器和清扫，见注5・带1000mm滑动波导管，见注1和5注1：只与喇叭尺寸选项C，D，E同时提供注5：只与压力等级选项1同时提供过程连接参见压力变化曲线・DIN DN 50 PN16，FF法兰，316S.S.・DIN DN 80 PN16，FF法兰，316S.S.・DIN DN 100 PN16，FF法兰，316S.S.・DIN DN 150 PN16，FF法兰，316S.S.・DIN DN 200 PN16，FF法兰，316S.S.・2″ANSI 150lb，FF法兰，316S.S.・3″ANSI 150lb，FF法兰，316S.S.・4″ANSI 150lb，FF法兰，316S.S.・6″ANSI 150lb，FF法兰，316S.S.・8″ANSI 150lb，FF法兰，316S.S.・DIN DN 50 PN40，FF法兰，316S.S.・DIN DN 80 PN40，FF法兰，316S.S.・DIN DN 100 PN40，FF法兰，316S.S.・DIN DN 150 PN40，FF法兰，316S.S.・DIN DN 200 PN40，FF法兰，316S.S.・2″ANSI 300lb，FF法兰，316S.S.・3″ANSI 300lb，FF法兰，316S.S.・4″ANSI 300lb，FF法兰，316S.S.・6″ANSI 300lb，FF法兰，316S.S.・8″ANSI 300lb，FF法兰，316S.S.・JIS DN 50 10K，FF法兰，316S.S.・JIS DN 80 10K，FF法兰，316S.S.・JIS DN 100 10K，FF法兰，316S.S.・JIS DN 150 10K，FF法兰，316S.S.・JIS DN 200 10K，FF法兰，316S.S.通讯/输出・4 - 20mA，HART，Modbus・Profibus PA，Modbus过程密封/垫片・FKM・Nitrile，只与波导管一起提供・FFKM，(-35~200℃)外壳/电缆入口・铝，环氧涂层2个1/2″NPT・铝，环氧涂层2个M20・316S.S.，2个1/2″NPT・316S.S.，2个M20喇叭尺寸/波导管・只带波导管 - 长度为用户自定・80mm喇叭，只用于有立管的情况・100mm喇叭・150mm喇叭・200mm喇叭・100mm喇叭，带100mm长的波导管・100mm喇叭，带150mm长的波导管・100mm喇叭，带200mm长的波导管・100mm喇叭，带250mm长的波导管・150mm喇叭，带100mm长的波导管・150mm喇叭，带150mm长的波导管・150mm喇叭，带200mm长的波导管・150mm喇叭，带250mm长的波导管・200mm喇叭，带100mm长的波导管・200mm喇叭，带150mm长的波导管・200mm喇叭，带200mm长的波导管・200mm喇叭，带250mm长的波导管认证・普通用途，CE，CSA US/C，见注2・CSA Class 1，Div 1，Groups A-G，CE，见注2・ATEX ll 1/2G EEx de llC T6，CE，见注2・FM，Class 1，Div 1，Groups A-G，FCC,6.3GHz，仅用于美国・普通用途，FM，FCC，6.3GHz，仅用于美国・EEx de [ia] llC T6，见注3・ATEX ll 1/2G EEx de [ia] llC T6，见注3注2：包括欧洲电磁波及加拿大工业认证，注3：只适用于通讯/输出选项1压力等级・按照操作手册上的压力/温度曲线等级・最大0.5 bar选件・红外手持编程器，本安，EEx ia 7ML 5830-2AH・PTEE杆式天线7ML 1830-1HC・PTEE杆式天线延长杆50mm(2″) 7ML 1830-1CH・PTEE杆式天线延长杆50mm(4 )7ML 1830-1CG・外壳扳手7ML 1830-1HB・RS485-RS232转换器，非隔离，端口供电7ML 1830-1HA・Doiphin PlusIQ Radar/SITRANS LR 300导波管・不锈钢。

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Our non-contacting transducers are impervious to dust, moisture, vibrations, flooding, and high temperatures. With the ability to detect submer-gence – when paired with a submergence shield – and an active face to reduce material buildup, these transducers are a perfect fit for a range of industrial applications. Siemens transducers are easy to install and require little to no maintenance.Echomax transducers feature Process Intelligence (when paired with a Siemens controller), our field-proven echo processing algorithms which guarantee the most reliable performance possible. And how about our unmatched beam angle – stronger pulse and sensitivity in a compact beam make our ultrasonic trans-ducers the most powerful in the industry.Echomax XPS-30 Echomax XPS-15Echomax XPS-10Echomax ST-H Echomax XRS-5Echomax XPS-15FHydrostaticHydrostatic level measurement with Siemens gauge, absolute, and differential pressure transmitters is a low cost option for direct mounting or mounting with remote seals on tanks and vessels. These instruments can handle extreme chemical and mechanical loads as well as electromagnetic interference. They are widely applied in chemical and petrochemical industries.SITRANS P500SITRANS LH100SITRANS LH300SITRANS P320/420Level by weightWith SIWAREX electronics and load cells, not only are you choosing the highest quality in construction, long-lasting performance, and easy integration into your weighing systems, you are also opening the doors to Siemens comprehensive spectrum of instrumentation.Automate all of your scales with SIWAREX weighing modules. Part of Siemens Totally Integrated Automation (TIA), SIWAREX modules can be integrated into SIMATIC and expanded as required to meet your individual requirements.SIWAREX WP231SIWAREX WT231Load cells for level weighingSIWAREX load cells have high precision and repeatability of weighing and batching processes. They are designed for a range of applications, especially when accuracy is a must. With Siemens, you can source both your load cells and electronics. Choose from our extensive, performance-graded line of weighing systems – with everything you need for the whole range of tasksin your industry.SIWAREX load cells are ideal in almost any industrial sector – food-processing, steel-making, chemical and pharmaceutical, to name a few. With the diverse construc t ion types and comprehensive, graded load classes ranging from 300 grams to 500 tons (6.6 pounds to 551 short tons), you are sure to find the right load cell for your application.SIWAREX WL270SIWAREX WL250SIWAREX WL230SIWAREX WL230SIWAREX WL260Vibratory and paddle switchesWith options as simple or sophisticated as you need them to be, Siemens point level devices are your answer.Whether you’re looking for backup high- or low-level detection, interface, or dry run protection – these switches will reduce your maintenance, downtime, and equipment replacement costs.Remote testing? Not a problem. A range of Siemens point level instruments now feature convenient remote testing via single or two-channel remote test signal conditioners or your control system.Product buildup? In addition to Siemens capacitance technology’s immunity to buildup, rotating point level devices specialize in low bulk density applications, ensuring accurate readings even in dusty, turbulent, and vaporous environments. Need functional safety in your application? Siemens offers the world’s first rotary paddle switch with SIL options in addition to a series of SIL instruments in all our point level lines.Whatever your requirement, Siemens has a switch solution.SITRANS LVS100SITRANS LVS200SITRANS LVL100/200SITRANS LPS200SITRANS LVS300RF Capacitance and ultrasonic switchesOur level switches offer superior performance while reducing maintenance, downtime, and equipment replacement cost. Their robust design lasts in harsh and abrasive environments, guaranteeing a long service life and low cost of ownership. They are easy to set up and connect to any alarm or control system. Our unique inverse frequency shift approach to capacitance technology ensures accurate, reliable, and repeatable measurement, even in dusty, turbulent, and vaporous environments or in situations with product buildup. Because even a small level change creates a large and detectable change in frequency, Siemens Pointek CLS series provides excellent resolution while consistently outperform-ing conventional devices.POINTEK CLS100 POINTEK CLS200POINTEK CLS300Remote monitoring and displaysIdeal for remote monitoring applications including inventory levels, regulatory monitoring, remote maintenance alarming, or process and environmental monitoring, SITRANS RD500 remote data manager helps you stay connected and informed. SITRANS RD500 provides remote monitoring through datalogging, web access, and alarming.SITRANS RD100, SITRANS RD150, SITRANS RD200, and SITRANS RD300 remote displays bring you the flexibility of seeing instrumentation readings in a conve-nient location for your operators. Our family of displays offer options for inte-grated pump control, totalizing, dual input, remote communication and moni-toring via HART or Modbus and remote configuration of connected sensors. There are times when information in the control room or on the instrument is not enough. Siemens’ selection of displays gives you an inexpensive view into your processes.SITRANS RD500SITRANS RD100SITRANS RD200 SITRANS RD150Sales and supportCustom engineeringSiemens provides custom-engineered products to solve your special application needs. From material compatibility challenges to unique size requirements, Siemens custom engineering team can help.Service around the worldPlants must function reliably at all times. Efficient and effective process instrumentation and analytics are an indispensable requirement to this end. You also need to be certain of fast and competent service from your supplier. Siemens is a global company that reacts locally. Whether you require consulting, quick delivery, or installation of new devices, the Siemens network of specialists is available to you around the world, wherever your loca-tion.Service around the clockOur online support system offers rapid, comprehensive assistance regardless of time or location. From product support to service information, Siemens Industry online support is your first choice – around the clock, 365 days a year./automation/service&supportTotally integrated automation Products from the controller level tothe field levelWith Totally Integrated Automation (TIA), Siemens is the only provider of an end-to-end integrated portfolio of products and systems for the automation of the entire production workflow. From the goods receiving area to the finished goods warehouse.Totally Integrated Automation reduces the complexity of the automation solution and enables what really counts: the practical combination of optimally coordinated indi-vidual components without interface problems.Totally Integrated Automation integrates not only the produc-tion process but all parts of the company from the field level to the management level. The result: a perfectly coordinated overall concept that enables higher productivity.Communication-flexibilitySiemens TIA approach offers ease of connection to a DCS systemsuch as SIMATIC PCS 7 using industrial standards. Siemensprovides communication flexibility, supporting:• SIMATIC PDM• PROFIBUS• HART• FOUNDATION Fieldbus• Model 375/475 HART field communicatorand Emerson AMS• SmartLinx (cards are available forPROFIBUS DP, Modbus RTU, and DeviceNet)• FDT Software via SITRANS DTM31Published by Siemens AG 2018Process Industries and Drives Östliche Rheinbrückenstr. 5076187 Karlsruhe GermanyArticle No.: PDPA-T90009-00-7600 Dispo 27900WS 01182.0Printed in Germany © Siemens AG 2018Subject to changes and errors. The information given in this document only contains general descriptions and/or performance features which may not always specifically reflect those described, or which may undergo modification in the course of further development of the products. The requested performance features are binding only when they are expressly agreed upon in the concluded contract.All product designations may be registered trademarks of Siemens AG. All other designations in this document may represent trademarks whose use by third parties for their own purposes may violate the proprietary rights of the owner.Follow us on:/siemenssensors /siemenssensors/siemensMeasuring everything that matters:/processinstrumentation Siemens Process Instrumentation offers best-in-class measurement and seamless integration into your automation system. We are the total solution provider for flow, level, pressure, temperature, weighing, positioners and more.。

User's Manual杭州米科传感技术有限公司更多资讯请扫二维码服务电话：400-163-1718杭州米科传感技术有限公司U-MIK-ZPZPM-ZZ CN2第2版超声波液位计使用说明书前言●感谢您购买本公司产品。

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版本U-MIK-ZPZPM-ZZCN2第二版2021年1月I目录第一章、产品概述 (1)第二章、产品特色 (2)第三章、主要技术参数 (3)第四章、菜单操作及参数设置 (5)第五章、安装方法及使用注意事项 (10)第六章、接线示意图 (16)第七章、常见疑难现象及处理方法 (22)第八章、质保及售后服务 (26)第九章、通讯协议 (27)II第一章产品概述第一章产品概述超声波物(液)位仪是一台博采众长，吸取了国内外多种物（液）位仪优点，解决了高温不能用超声难题。

实现了全数字化，人性化设计理念的通用型物（液）位仪，具有完善的物（液）位测控，数据传输和人机交流功能。

本产品支持隔离4-20mA、HART输出。

本产品具有抗干扰性强、线性好、精度高等特点。

本产品不必接触工业介质就能满足大部分液位、料位测量要求，彻底解决了压力式、电容式、浮子式等传统测量方式带来的缠绕、堵塞、泄露、介质腐蚀、维护不便等缺点。

因此可广泛应用于与料位、液位测控相关的各个领域。

1第二章产品特色第二章产品特色●电压适应范围宽●备份和还原设置功能●可测多种物理量功能●可任意调整模拟量输出●支持自定义串口数据格式●具有输出量程起点、终点任意设置●具有增值/差值测距选择既可测距离也可测物位●具有多级发射脉冲强度，可根据工况设定●OLED中英文菜单（带自发光）2第三章主要技术参数第三章主要技术参数3第三章主要技术参数安装方式螺纹安装/法兰安装温度补偿自动温度补偿，具备温度校准功能测量变量物位/距离发射角度＜10°＜6°仪表材质ABS工程塑料、PP ABS工程塑料电气接口M20X1.5-2安装接口M60X2M30X1.5键盘三位轻触键4第四章菜单操作及参数设置第四章菜单操作及参数设置请认真阅读以下说明，对应所购买产品类型菜单，谨慎操作菜单5第四章菜单操作及参数设置6输出设置开关1通道D值默认1，单位m1通道H值默认2，单位m2通道D值默认1，单位m2通道H值默认2，单位m3通道D值默认1，单位m3通道H值默认2，单位m开关配置不可修改显示设置显示单位m（认）,cm,mm,yard,foot,inch,L,m3,g,kg小数位数3（默认）显示换算不可修改对比度不可修改关显示时15分钟（默认）探头设置介质介质选择不可修改自定义声速探头特性测量周期盲区发射强度接收增益最大增益采样门限采样率滤波无急速快速默认一般稳定第四章菜单操作及参数设置7探头设置参数修正温度不可修改显示线性声速效准杆系统设置用户用户密码“0000”管理员密码“1000”低功耗设置唤醒周期不可修改工作时间低压保护语言中文、English 还原取消、确定选择确定备份取消、确定选择确定第四章菜单操作及参数设置输出设置模拟量输出高端微调可微调虚拟输出不可修改模拟量输出配置不可修改串口串口地址HART设备地址串口读写状态显示设置显示单位m（认）,cm,mm,yard,foot,inch,L,m3,g,kg 保留小数位数3（默认）显示换算不可修改对比度不可修改关显示延时15分钟（默认）探头设置介质介质选择不可修改自定义声速探头特性测量周期盲区发射强度接收增益采样门限滤波无急速快速默认一般稳定参数修正温度修正不可修改显示修正线性修正第四章菜单操作及参数设置探头设置参数修正声速效准杆不可修改系统设置用户设置用户密码修改“0000”管理员密码修改“1000”语言中文、English还原取消、确定选择确定备份取消、确定不建议修改第五章安装方法及使用注意事项第五章安装方法及使用注意事项5.1产品尺寸图1常规款第五章安装方法及使用注意事项图2小盲区款第五章安装方法及使用注意事项5.2探头的安装1.探头同时产生超声脉冲波和检测回波，超声脉冲波以一定的锥形波面从探头的表面传播出去。

超声波液位计操作规程本规程适用于公司在用的Sitrans PROBE LU一体化超声波液位计的维护、校准、投运及检修的具体技术要求和操作程序。

一、工作原理超声波液位计工作原理是由超声波换能器(探头)发出高频脉冲声波遇到被测物位(物料)表面被反射折回反射回波被换能器接收转换成电信号。

声波的传播时间与声波的发出到物体表面的距离成正比。

声波传输距离H与声速V和声传输时间T的关系可用公式表示:H=V×T/2.这样，只要测得超声波从发射到接收的这个传播时间，就可以得到从探头到物料的距离了。

Sitrans PROBE LU一个回路供电的连续物位监测器。

仪表整体包括传感器和与之相连的电子元器件。

传感器的材质为ETFE（乙烯-聚四氟乙烯），另外，在传感器中内置一个温度敏感元件来补偿应用过程当中的温度变化。

电源：24VDC 最大550Ω频率：54KHz量程范围：6m型：0.25m～6m，12m型：0.25m～12m盲区：0.25m精度：最大量程的0.15%二、运行模式上电后，Sitrans PROBE LU自动启动探测料位。

初始读数为以设置的零点（空位）为基准的料位值（单位米）。

正常显示如下图：1—初始读数（显示物位，采用物理单位或百分比）2—次级读数（显示补充读数的参数代码）3—回声状态指示标志：可信回波或不可信回波4—物理单位或百分比5—状态棒图显示物位值6—补充读数如果回波的置信度降到低于回波置信度阈值，则故障保护计时器开始运行。

当计时器计时满时，字母LOE（回波丢失）与读数交替显示。

三、编程模式1、编程模式显示如下图：1—初始读数（显示参数值）2—次级读数（显示参数代码）3—编程状态标志4—补充读数（如果可选语言，则显示P001～P010的参数名称。

否则显示具有编号的参数的代码，如P054）编程模式下的手持编程器功能键：2、参数读取：①、按下PROGRAM键，再按DISPLAY键，击活编程模式②、或者使用箭头键滚动显示不同的参数值，③、按DISPLAY打开参数代码显示区。

The Probe一体化超声波液位计安装与操作1.介绍注意：PROBE 仅在本说明书规定方式下使用。

PROBE 超声波液位计将传感元件与电子元件一体化，用于测量敞口或封闭容器液位，PROBE 在工业上应用范围很广，尤其在食品及化工行业。

传感元件包含超声波传感器和温度检测元件。

超声波传感器发出一系列超声波脉冲，每一个脉冲经介质反射回一个回波，PROBE 对回波进行处理，经过滤区分真实回波与其它虚假回波，脉冲到达介质表面并返回的时间经过温度补偿后转化成mA 信号输出，远传显示。

安装环境PROBE 的安装环境温度应在规定范围内，且该位置应能满足仪表对安装等级及建筑材料的要求。

前盖应很容易打开以便编程、接线、及观察显示。

建议使PROBE 远离强电压、电流、开关、及SCR 控制激励器。

安装位置PROBE 液位计的安装要保证其声波通道畅通且与液面垂直。

液位计的声波通道不能与进料物流、粗糙的内壁、接缝、横档等交叉。

-40°C 60°C 管横档接缝卫生接头fill 2.安装注意：PROBE 安装时中，其传感器表面到预计最高液位的距离不低于25cm。

螺纹连接PROBE 液位计有三种螺纹：2＂NPT，2＂BSP 或PF2。

注意：在将液位计插入安装孔前，确认螺纹类型一致，以免液位计螺纹损坏。

法兰适配器（可选）PROBE 液位计可配备75mm （3＂）法兰适配器（可选），它可以与3＂ANSI，DIN 65PN10 及JIS 10K3B 法兰配用。

接线A. 盖子未打开前，根椐接线需要起开某一侧的“KNOCK OUT”塞子。

B. 松开螺丝，打开盖子。

C. 把电缆引入液位计D. 接好电缆。

E. 合上盖子，拧紧螺丝，使扭矩达到1.1～1.7N-m （10～15in-lb）。

系统图：可选法兰适配器盖电缆入口电子单元安装螺纹传感器螺纹PROBE液位计回路仪表286mm 74mm The Probe 3 本质安全型FM/SAA 根据FM/SAA 评价理论，PROBE 液位计具有以下特点：Vmax=30V dc Imax=200mA dc Ci=0 Li=0 该评价理论允许本质安全型仪表与相关仪表的连接在这种系统中不必经过专门检验，连接的标准为：本质安全型仪表可以接受并能保持本质安全的最大电压（V oc 或Vt）和电流（Isc 或It）（包括故障情况时）必需等于或大于所连接仪表所能发出的电压和电流（包括故障情况时），本质安全型仪表最大无防护电感（Ci）和电容（Li）（包括连接导线）必需等于或小于相联仪表可安全连接的电感和电容。