ST3000900智能压力变送器
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仪表工考试:高级仪表工(最新版)1、判断题用节流装置测流量时,节流装置应安装在调节阀后面。
正确答案:错2、单选压力表的适用范围一般在它量程的1/3~2/3处,如果超过2/3,则()A、接头或焊口漏B、接线柱间集(江南博哥)灰C、弹簧管线无法承受D、时间长了精度要下降正确答案:D3、单选常用的节流装置的取压方式有()。
A、角接取压和径距取压B、法兰取压和径距取压C、理论取压和管接取压D、角接取压和法兰取压正确答案:D4、单选霍尼韦尔ST3000/900系列全智能模拟方式变送器的精度为()。
A、±0.075%B、±0.02%C、±0.05%D、±0.1%正确答案:D5、问答题积分调节规律的含义是什么?正确答案:积分调节是依据‘偏差是否存在’来动作的;其输出与偏差对时间的积分成比例。
6、单选下列()可能导致连联锁系统产生误动作。
A、工艺参数波动B、联锁切除C、“三取二”检测回路中—检测原件故障D、电磁阀故障正确答案:D7、判断题要把浮筒室的放空阀打开时必须先把上下游的切断阀关闭。
正确答案:对8、填空题调节阀的放大系数主要由()决定。
正确答案:阀体9、单选反馈调节系统是闭环系统()A、不一定B、不是C、是正确答案:C10、判断题兆欧表的接线柱有两个。
正确答案:错11、判断题法兰式差压变送器的型号后面带"A"表示可进行正迁移;带"B"表示可进行负迁移。
正确答案:对12、判断题热电阻温度计指示值偏低,则热电阻有可能短路。
正确答案:对13、判断题用孔板测量流量,应将孔板安装在调节阀前。
正确答案:对14、问答题控制系统一般应包含什么?正确答案:控制器、执行器、测量变送器、受控对象。
15、单选有一个变化范围为150--450℃的温度,则用以下哪个温度仪表测量准确度最高()。
A.1级0--600℃B.0.5级200--450℃C.0.5级0--600℃D.1级200--450℃正确答案:C16、判断题比例调节过程的余差与调节器的比例度成正比.正确答案:对17、判断题用双法兰差压变送器测量液位时,变送器的量程应该等于正、负压的间距乘以介质的比重正确答案:对18、判断题热电阻Cu50在接线时,不要将正负接反正确答案:错19、单选变浮力式液位计是根据()随液位的变化而变化来进行液位测量的。
ST3000压力变送器美国霍尼韦尔(HONEYWELL)公司于1983年独家率先向全世界推出智能化现场仪表-ST3000 100系列全智能压力变送器!这是对传统现场仪表的一次深刻变革!它为工业自动化仪表及其系统应用,向更高层次的发展奠定了基础。
全智能变送器的问世,开创了现场仪表的新纪元。
美国霍尼韦尔公司,在92年4月6日向中国推出了ST3000/900系列全智能变送器,它具有数字式全智能变送器的全部优越性能,而价格接近传统模拟式常规变送器。
97年底,霍尼韦尔公司又推出可测高温的压力变送器,接收过程温度最高可达150℃。
以及新推出SMV多变量流量变送器。
新的传感器,电子线路以及软件都可提供动能流量补偿,提供流量测量的精度,并用SCT3000组态软件装载到PC上对变送器进行组态主要特点* 高安全、可靠性* 高稳定性、重复性* 高精度* 宽量程比* 宽移率* 宽域温度静压补偿* 过程组态* 完善的自诊断功能* 双向数字通讯* 模拟、数字两种输出方式* 全数字技术TDC3000(TPS)系统简介TDC3000X开放而安全的生产与过程控制系统:•强大与多样性TDC3000集散控制系统,它是TotalPlant全厂一体化开放概念里的一个平台。
通过一个创新的系统结构和开放的通讯环境,TDC3000将过程和现场仪表的管理(控制层)与生产和信息的管理(信息层)集成在一起,形成一个信息与控制的集成系统。
由此,通过一个单一窗口就可以为企业管理者提供各类数据,辅助他们及时地作出经营决策;同时,系统的通用性和可靠性确保了过程运作的安全进行。
•开放与安全性控制层与信息层的结合,主要是靠系统内的两种双处理器模件--------万能工作站(UxS)与应用模件(AxM)来实现。
这两种模件形成了TDC3000结构中称为X-LAYER的X层。
UxS是TDC3000系统的用户界面,符合X WINDOWS/MOTIF工业标准,它向操作者和工程师提供了一个面向现场过程控制与全厂信息的统一窗口;AxM是TDC3000系统内一个高性能且可靠的应用平台,可执行专用的或开放的应用软件。
1.1总题内容与使用范围1.2本规程规定了ST3000智能变送器的维护、检修投运及其安全注意事项的具体技术要求和实施程序。
1.3本规程适用于化工装置中在线使用的ST3000智能变送器(以下简称仪表)。
1.4基本工作原理。
1.5该仪表基于惠斯通电桥原理工作。
它以微处理器为核心,可实现对信号的运算、处理及通讯。
1.6构成及功能1.7该仪表构成如图1所示。
1.81.91.101.114 ~ 20mA1.12直流或数字1.131.14信号1.151.161.17图 11.181.191.20检测元件:将检测的差压、压力、温度、静压信号转变为电流信号。
1.21模数转换器:将电流信号转换为数字信号。
1.22存储器:用于存储各类数据.1.23微处理器:完成各类数据的运算、处理。
1.24数模转换器:将数字信号转换为4~20mA Dc的模拟输出信号。
1.25主要技术性能及规格1.261.4.1 性能指标1.27基本误差:±%1.28响应时间:1.29规格1.30输出:4~20mA1.31供电电压:24V DC±10%1.32负载电阻:250Ω1.33温度: -5~65℃1.34湿度:10%~90%1.35对维修人员的要求1.36熟悉本规程的产品说明书和有关技术资料;1.37了解有关的生产工艺流程及该仪表在其中的作用;1.38掌握数字电路技术、模拟电路技术、化工测量仪表等方面的基础理论知识;1.39掌握该仪表维护、检修、投运几常见故障处理的基本技能;1.40掌握常用测试仪器和有关的标准仪器使用方法;1.41掌握ST3000现场通讯器的使用方法。
1.422 完好条件1.43零部件完整,符合技术要求,即:1.44铭牌应清晰无误;1.45零部件应完好齐全;1.46紧固件不得松动;1.47接插件应接触良好。
1.48运行正常,符合使用要求,即运行时仪表应达到规定的性能指标。
1.49设备及环境整洁符合工作要求,即:1.50整机应清洁、无锈蚀,漆层平整、光亮、无脱落;1.51仪表线路敷设整齐;1.52仪表标记齐全、清晰、准确;1.53环境应满足本规程条的要求。
ST3000/900智能压力变送器应用领域:差压测量,压力测量,与节流装置配合进行流量测量,液位测量,界面测量。
一、概述ST3000系列压力变送器是以微处理器为基础的智能变送器。
最新推出的R300版本,全面提升了变送器的精度、可靠性及长期稳定型指标。
他能测量各种液体和气体的压力,并输出对应的4~20mA模拟信号。
它独特的温度和静压误差自动修正功能使其能满足苛刻的使用环境。
它具有DE通讯协议,可与霍尼韦尔的Experion PKS™集散控制系统和智能现场通讯器(SFC)实现双向数字通讯,消除了模拟信号传输误差,方便了变送器的调试、校验和故障诊断。
二、产品特点先进的传感技术:采用离子注入硅技术,在差压传感器上继承了静压和温度传感器,随时修正过程温度和静压引起的误差,提高了测量精度和稳定性。
高可靠性:平均无故障时间470年。
高稳定性:±0.015%/年。
高精度:±0.065%。
测量范围宽:STG944 0-3.5MPaSTG974 0-21 MPa规格齐全:接液部分有各种防腐材料备选,能满足各种工况条件下的使用,特殊要求,请与我公司联系。
具备各种本安和隔爆认证。
可选HART协议。
可选现场总线(FF)通讯协议。
使用现场通讯器或MCT多协议通讯器实现对ST3000变送器的组态、校验和故障诊断等。
可通过便携电脑,用SCT组态工具组态。
可与霍尼韦尔Experion PK集散控制系统实现数字一体化。
体积小、重量轻:4.1Kg。
三、适用场合电力,冶金,石油、石化,化工,造船,建材(水泥、玻璃等),水处理,制药,造纸,食品及烟草,气象等工矿场合。
选型说明主型号选择可选项表Ⅰ-表体表Ⅱ表Ⅲ-可选项表Ⅳ选择限制表。
ST 3000 Smart TransmitterSeries 900 Flange Mounted Liquid Level ModelsSTF924 0 to 400 inH 2O 0 to 1000 mbar STF932 0 to 100 psi 0 to 7 barSTF92F0 to 400 inH 2O0 to 1000 mbarSTF93F 0 to 100 psi 0 to 7 bar34-ST-03-6810/2002Specification and Model SelectionGuideIn 1983, Honeywell introduced the first Smart Pressure Transmitter ― the ST 3000®. In 1989, Honeywell launched for smart field devices. Today, its ST 3000 Series 900 Flange-mountproven “smart” technology to a wide spectrum of pressure measurement applications. Flange-mounttank connections including ANSI flanges and sanitary. Applications include gauge pressure measurement in pressure vessels in the chemical industry as well as level applications in both the chemical and hydrocarbon processing industries with either wet or dry legs on the low side. Versatility is made possible though compound characterization of the meter body as well as the ability to measure a broad range of differential pressures.All ST 3000 transmitters can provide a 4-20 mA output, Honeywell Digitally Enhanced (DE) output, HART * output, or F OUNDATION™ Fieldbus output. When digitally integrated with Honeywell’s Process Knowledge System™, EXPERION PKS™,ST 3000 instruments provide a more accurate process variable as well as advanced diagnostics.Honeywell’s cost-effective ST 3000 S900 transmitters lead the industry in reliability and stability:• Stability = +/-0.01% per year • Reliability = 470 years MTBFFigure 1—Series 900 Flange Mounted Pressure Transmitters feature proven piezoresistive sensor technology.The devices provide comprehensive self-diagnostics to help users maintain high uptime, meet regulatory requirements, and attain high quality standards. S900 transmitters allow smart performance at analog prices. Accurate, reliable and stable, Series 900 transmitters offer greater turndown ratio than conventional transmitters."Honeywell transmitters operating in the digital mode usingHoneywell's Digitally Enhanced (DE) protocol make diagnostics available right at the control system's human interface. Equallyimportant, transmitter status information is continuously displayed to alert the operator immediately of a fault condition. Because theprocess variable (PV) status transmission precedes the PV value, we are guaranteed that a bad PV is not used in a control algorithm. In addition, bi-directional communication provides for remote transmitter configuration directly from the human interface, enabling management of the complete loop.”Maureen Atchison, DuPontSite Electrical & Instrumentation LeaderIntroduction34-ST-03-68Page 2Description FeaturesThe ST 3000 transmitter can replace any 4 to 20 mA output transmitter in use today and operates over a standard two-wire system.The measuring means is a piezoresistive sensor, which actually contains three sensors in one. It contains a differential pressure sensor, a temperature sensor, and a static pressure sensor.Microprocessor-based electronics provide higher span-turndown ratio, improved temperature and pressure compensation, and improved accuracy.The transmitter’s meter body and electronics housing resist shock, vibration, corrosion, and moisture. The electronics housing contains a compartment for the single-board electronics, which is isolated from an integral junction box. The single-board electronics is replaceable and interchangeable with any other ST 3000 Series 100 or Series 900 model transmitter.Like other Honeywell transmitters, the ST 3000 features two-way communication between the operator and the transmitter through our Smart Field Configurator (SFC). You can connect the SFC anywhere that you can access the transmitter signal lines.The SCT 3000 Smartline® Configuration Toolkit provides an easy way to configure instruments using a personal computer. The toolkit enables configuration of devices before shipping or installation. The SCT 3000 can operate in the offline mode to configure an unlimited number of devices. The database can then be loaded downline during commissioning. • Choice of linear or square root output conformity is asimple configurationselection.• Direct digital integration with Experion PKS and othercontrol systems provides localmeasurement accuracy to thesystem level without addingtypical A/D and D/A converterinaccuracies.• Unique piezoresistive sensor automatically compensatesinput for temperature andstatic pressure.Added “smart”features include configuringlower and upper rangevalues, simulating accurateanalog output, and selectingpreprogrammed engineeringunits for display.• Smart transmitter capabilities with local or remoteinterfacing means significantmanpower efficiencyimprovements incommissioning, start-up, andongoing maintenancefunctions.34-ST-03-68Page 3SpecificationsOperating Conditions – All ModelsParameter ReferenceCondition (at zero static)Rated Condition Operative LimitsTransportation and Storage°C °F °C °F °C °F°C°FAmbient Temperature 25 ±1 77 ±2 -40 to 85 -40 to 158-40 to 85-40 to 185 -55 to 125-67 to 257Meter Body Temperature 25 ±1 77 ±2 -40 to 110*-40 to 230*-40 to 125 -40 to 257 -55 to 125-67 to 257Process Interface TemperatureSTF924, STF932 only25 ±177 ±2-40 to 110**-40 to 230**-40 to 175†-40 to 350†-55 to 125-67 to 257Humidity %RH 10 to 550 to 100 0 to 100 0 to 100Overpressure (Flange Rating) ANSI Class 150 psi bar0 0265 18 210 14ANSI Class 300 psibar 0 0 690 48 640 44 Vacuum Region - Minimum PressuremmHg absoluteinH 2O absolute atmospheric atmospheric 25 132 (short term ††) 1 (short term ††)Supply Voltage, Current,and Load ResistanceVoltage Range: 10.8 to 42.4 Vdc at terminals Current Range: 3.0 to 21.8 mALoad Resistance: 0 to 1440 ohms (as shown in Figure 2)* For model STF932 with CTFE fill fluid, the rating is –15 to 110°C (5 to 230°F); for models STF92F and STF93F with CTFE fill fluid, the rating is –15 to 70°C (5 to 158°F).** For model STF932 with CTFE fill fluid, the rating is –15 to 110°C (5 to 230°F). † For CTFE fill fluid, the maximum temperature rating is 150°C (300°F).34-ST-03-68Page 4O/1000 mbar)Performance Under Rated Conditions* - Model STF924 (0 to 400 inH34-ST-03-685Page* Performance specifications are based on reference conditions of 25°C (77°F), zero (0) static pressure, 10 to 55% RH, and316L Stainless Steel barrier diaphragm.34-ST-03-68Page 6O/25 mbar)Performance Under Rated Conditions* - Model STF92F (0 to 400 inH316L Stainless Steel barrier diaphragm.34-ST-03-687Page316L Stainless Steel barrier diaphragm.34-ST-03-68Page 8Performance Under Rated Conditions - General for all ModelsParameter DescriptionOutput (two-wire) Analog 4 to 20 mA or DE digital communications mode. Options available for F OUNDATION Fieldbus and HART protocol. Supply Voltage Effect 0.005% span per volt.Damping Time Constant Adjustable from 0 to 32 seconds digital damping.CE Conformity (Europe) 89/336/EEC, Electromagnetic Compatibility (EMC) Directive. Lightning Protection Option (Code “LP”)LeakageCurrent:***********************,93°CImpulse Rating: 10/20 µ sec. 5,000 Amps (50 strikes) 10,000 Amps (20 strikes)(rise/decay) 10/1000 µ sec. 250 Amps (1000 strikes) 500 Amps (400 strikes)Physical and Approval BodiesParameter DescriptionBarrier Diaphragms Material (Wetted)316L SS, Hastelloy C-276 Gasket Ring Material (Wetted) 316 SS, Hastelloy C-276* Extension Tube Material (Wetted)316 SSProcess Head and Adapter Flange Material 316 SS, Carbon Steel (zinc-plated), Hastelloy C-276* Sanitary Flange Mount All parts are 316 SS. Process Head Gaskets Teflon is standard.Meter Body Bolting Carbon Steel or 316 SS (NACE) bolts. Mounting Flange STF924, STF932STF92F, STF93FFlush or Extended Diaphragm : Zinc Chromate plated Carbon Steel, 304 SS, or 316 SS.Sanitary Design: 316 SS316 SS (NOTE: Mounting Flange is process wetted.)Fill FluidSilicone oil or CTFE (Chlorotrifluoroethylene)Electronic Housing Epoxy-Polyester hybrid paint. Low Copper-Aluminum. Meets NEMA 4X (watertight) and NEMA 7 (explosion proof). Stainless steel optional. Process ConnectionsAll ModelsSTF924, STF932STF92F, STF93FProcess Head: 1/4-inch NPT; 1/2-inch NPT with adapter, standard option.Flange: 3 or 4-inch Class 150 or 300 ANSI; DN80-PN40 or DN100-PN40 DIN flange. Extended Diaphragm: 2, 4, or 6 inches (50, 101, 152 mm) long.Sanitary Flange Mount: 4-inch sanitary tank spud with Ladish 4-inch Tri-Clamp. See Specification 34-ST-03-26. 3-inch, Class 150 ANSI flange.Table continued on next page ⇒34-ST-03-68Page 9Physical and Approval Bodies, continuedParameter DescriptionWiring Accepts up to 16 AWG (1.5 mm diameter).Mounting See Figure 3 for typical flange mounting arrangement. Dimensions See Figures 4, 5, and 6Net WeightSTF924, STF932STF92F, STF93FFlush Model: 26.5 pounds (12 Kg)15.4 pounds (7 Kg) Approval Bodies - Hazardous AreasApproved as explosion proof and intrinsically safe for use in Class I, Division 1, Groups A, B, C, D locations, and nonincendive for Class I, Division 2, Groups A, B, C, Dlocations. Approved EEx ia IIC T4, T5, T6 and EEx d IIC T5, T6 per ATEX standards. See attached Model Selection Guide for options.Pressure Equipment Directive (97/23/EC)The ST 3000 pressure transmitters listed in this Specification have no pressurized internal volume or have a pressurized internal volume rated less than 1,000 bar(14,500 psig) and/or have a maximum volume of less than 0.1 liter. Therefore, these transmitters are either; not subject to the essential requirements of the directive 97/23/EC (PED, Annex 1) and shall not have the CE mark, or the manufacturer has the free choice of a module when the CE mark is required for pressures > 200 bar (2,900 psig).• Flush design only.NOTE: Pressure transmitters that are part of safety equipment for the protection of piping (systems) or vessel(s) from exceeding allowable pressure limits, (equipment with safety functions in accordance with Pressure Equipment Directive 97/23/EC article 1, 2.1.3), require separate examination.Figure 3—Typical mounting arrangement for flange mounted liquid level transmitter34-ST-03-68Page 10Figure 4—Approximate mounting dimensions for STF924 and STF932 flush diaphragm typeFigure 5—Approximate mounting dimensions for STF924 and STF932 extended diaphragm typeFigure 6—Approximate mounting dimensions for STF92F and STF93F pseudo flange type50 1971/4" NPT55.72.19283.211.15181.67.15or53.32.10154.96.10orOptional external ground 23.5 .925266.6 10.5OptionalmetersRotationallock1/2"NPTFigure 7—Typical mounting dimensions for Flange-Mounted Liquid Level Transmitter with sanitary flange for 4-inch diameter tank spud—For Reference OnlyOptions Ordering InformationMounting BracketThe angle mounting bracket is available in either zinc-plated carbon steel or stainless steel and is suitable for horizontal or vertical mounting on a two inch (50 millimeter) pipe, as well as wall mounting. An optional flat mounting bracket is also available in carbon steel for two inch (50 millimeter) pipe mounting.Indicating Meter(ME and SM Options)Two integral meter options are available. An analog meter (option ME) is available with a 0 to 100% linear scale. The Smart Meter (option SM) provides an LCD display for both analog and digital output and can be configured to display pressure in pre-selected engineering units.Lightning Protection (Option LP)A terminal block is available with circuitry that protects the transmitter from transient surges induced by nearby lightning strikes. HART Protocol Compatibility (Option HC)An optional electronics module is available for the ST 3000 that provides HART Protocol compatibility. Transmitters with the HART Option are compatible with the AMS System. (Contact your AMS Supplier if an upgrade is required.) Indicator Configuration(Option CI)Provides custom configurationof Smart Meters.Tagging (Option TG)Up to 30 characters can be addedon the stainless steel nameplatemounted on the transmitter’s elec-tronics housing at no extra cost.Note that a separate nameplate onthe meter body contains the serialnumber and body-related data. Astainless steel wired on tag withadditional data of up to 4 lines of 28characters is also available. Thenumber of characters for taggingincludes spaces.Transmitter Configuration(Option TC)The factory can configure thetransmitter linear/square rootextraction, damping time, LRV,URV and mode (analog/digital) andenter an ID tag of up to eight char-acters and scratchpad informationas specified.Custom Calibration and ID inMemory (Option CC)The factory can calibrate any rangewithin the scope of the transmitter’srange and enter an ID tag of up toeight characters in the transmitter’smemory.F OUNDATION Fieldbus(Option FF)Equips transmitter with FF protocolfor use in 31.25 kbit/s FF networks.See document 34-ST-03-72 foradditional information on ST 3000Fieldbus transmitters.Contact your nearest Honeywell salesoffice, orIn the U.S.:HoneywellIndustrial Automation & Control16404 North Black Canyon Hwy.Phoenix, AZ 850531-800-288-7491In Canada:The Honeywell Centre155 Gordon Baker Rd.North York, Ontario M2H 3N71-800-461-0013In Latin America:Honeywell Inc.480 Sawgrass Corporate Parkway,Suite 200Sunrise, FL 33325(954) 845-2600In Europe and Africa:Honeywell S. A.Avenue du Bourget 11140 Brussels, BelgiumIn Eastern Europe:Honeywell Praha,s.r.o. Budejovicka 1140 21 Prague 4,Czech RepublicIn the Middle East:Honeywell Middle East Ltd.Khalifa Street,Sheikh Faisal BuildingAbu Dhabi, U. A. E.In Asia:Honeywell Asia Pacific Inc.Honeywell Building,17 Changi Business Park Central 1Singapore 486073Republic of SingaporeIn the Pacific:Honeywell Pty Ltd.5 Thomas Holt DriveNorth Ryde NSW Australia 2113(61 2) 9353 7000In Japan:Honeywell K.K.14-6 Shibaura 1-chromeMinato-ku, Tokyo, Japan 105-0023Specifications are subject to change without notice.(Note that specifications may differ slightly for transmitters manufactured before October 30, 1995.)Or, visit Honeywell on the World Wide Web at: Model Selection Guide (34-ST-16-30)Use Stainless Steel heads.** Vent/Drains are Teflon coated for lubricity.Model Selection Guide, cont.Availability*** For part numbers and pricing information on Tank Spuds refer to page ST-91 (Supplementary Accessories & Kits).Model Selection Guide, cont.AvailabilityModel Selection Guide, cont.AvailabilitySTF9Ex n IIC T6 (T4 with SM option)Intrinsically Saft, Zone Enclosure IP 66/67Non-Sparking, Zone 2(Honeywell). Enclosure IP 66/67*See ATEX installation requirements in the ST 3000 User's Manual97/23/EC Pressure Equipment Directive (PED)The ST 3000 pressure transmitters listed in this Model Selection Guide are in conformity with the essential requirements of the PED. A formal statement from TÜV IndustryService Group of TÜV America, Inc., a division of TÜV Süddeutschland, a Notified Body regarding the Pressure Equipment Directive, is available upon requestModel Selection Guide, cont.Note:See ST-83 for Published Specials with pricing.See ST-89 and User's Manual for part numbers.See ST-OE-9 for OMS Order Entry Information including TC, manuals, certificates, drawings and SPINS.See ST-OD-1 for tagging, ID, Transmitter Configuration (TC) andcalibration including factory default values.To request a quotation for a non-published "special", fax RFQ to Marketing Applications.Model Selection Guide, cont.This page is intentionally left Blank.ST 3000 is a registered trademark of Honeywell International Inc.HART* is a trademark of the Hart Communication Foundation.FOUNDATION™ is a trademark of the Fieldbus Foundation.Industrial Measurement and ControlHoneywell International Inc.16404 North Black Canyon HighwayPhoenix, Arizona 85053 Honeywell International Inc.。
HONYWELL ST3000智能变送器典型故障分析及对策1引言ST3000智能变送器,是美国霍尼韦公司用于现场压力,差压,温度等测量的智能化仪表。
它可工作常规的4—20mA DC 模拟信号下,也可与TPS系统进行数字传输,传输精度较常规模拟信号比较要高一个数量级达到0.1%,采用DE通讯协议,具有通讯频率低,网络的最大时间常数较大,电缆分布电容较HART协议的智能仪表宽容的多。
日益得到广泛应用。
2ST3000系列智能变送器由于智能变送器可工作于模拟信号传输方式,也可工作数字信号的传输方式。
变送器的故障及产生原因也不尽相同,为弄清变送器故障及产生原因,有必要介邵一下智能变送器的结构及通讯原理2.1.1 ST3000智能变送器的结构ST3000智能变送器由复合传感器和微处理器两部分组成。
差压,温度,静压三种物理量作用到复合传感器上,复合传感器采用集成电路的扩展工艺生成在一片单晶硅上。
传感器的检测信号经模数转换后周期地读入微处理器,经综和运算处理,完成精确的对应压力,差压,静压计算,产生波特率为220Hz的低频脉冲与TPS进行数字信号传输,或数模转换产生4—20mA DC信号。
具体如图示。
2.1.2 ST3000智能变送器的通讯原理ST3000智能变送器在模拟方式下,只能用SFC进行修改,通讯时使用半双工通讯方式。
即SFC发出一条指令信息和一个26mA叫醒脉冲,使变送器处于通讯模式输出4mA,进行数据通讯。
智能变送器收到指令信息后,经处理发一响应给SFC,结束一次通讯。
在数字方式下,使用主从管理模式,数字通讯下,只能与霍尼韦尔智能通讯卡相连,采用波特率为220Hz的电流脉冲“4mA” “20mA”分别代表逻辑“1” “0”,数据以24位浮点数,通过标准的双绞线发送至智能通讯卡,完成数据传送2.2 ST3000系列智能变送器故障及产生原因2.2.1 ST3000智能变送器工作在模拟方式下,引起变送器故障原因,是现场强电磁场产生的尖峰脉冲和回路电阻对输出信号影响。
霍尼韦尔(honeywell)美国霍尼韦尔(honeywell)ST3000/900系列全智能变送器*Honeywell- HoneywellST3000 系列变送器(备有现货,优势价格,项目协作)差压型号:STD924 STD930 STD974 STD904微差压:STD120 STD110 STD130 STD170 STD125压力型号:STG944,STG974 ,STG94L ,STG97L,STG98L ,STG99L单法兰:STF924 STF932 STF92F STF93F双法兰:STR93D STR94G霍尼韦尔绝压型号:STA922 STA940 STA92L STA94L温度变送器:STT171 STT173 STT250SFC智能手操器STS103-001-00006-24常用型号: 霍尼韦尔差压变送器的型号有以下等:STD924-A1A-00000-MB,SM,1C (0-100KPa)STD924-E1A-00000-AN,MB,SM,1C (0-100KPa)STD924-E1H-00000-MB,S2,SM,1C (0-100KPa)STD930-A1A-00000-MB,SM,1C (0-700KPa)STD930-E1A-00000-MB,SM,1C (0-700KPa)STD930-E1H-00000-S2,MB,SM,1C (0-700KPa)STD924霍尼韦尔差压变送器 霍尼韦尔压力变送器 ST3000STD930STG944/974 霍尼韦尔压力变送器STG944(0~140 至 0~3500kPa)STG974(0~2.1 至 0~21MPa)常用型号: 霍尼韦尔压力变送器的型号有以下等:STG944-A1A-00000-SM,MB,1C (0~140 至 0~3500kPa)STG944-E1A-00000-SM,MB,1C (0~140 至 0~3500kPa)STG944-E1G-00000-S2,SM,MB,1C (0~140 至 0~3500kPa)STG944-A1G-00000-S2,SM,MB,1C (0~140 至 0~3500kPa)STG974-A1A-00000-SM,MB,1C (0~2.1 至 0~21MPa)STG974-E1A-00000-SM,MB,1C (0~2.1 至 0~21MPa)1)4~20mA标准的制定者,全球第一台智能变送器的提供者2)真正的全量程精度达到0.075%,而非其它厂家标称的参考精度0.075%;这一点得益于霍尼韦尔所独有的复合传感器技术;3)最小的耐静压值为21Mpa(STD110与远传法兰除外);4)任何一台霍尼韦尔变送器均可满足最严格的防爆要求,防爆要求不需另加价;5)负载能力高达1440欧姆……Honeywell压力变送器ST3000系列包含了差压,绝压,表压,微差压,远传法兰,和液位变送器一系列完整的产品。
HoneywellST3000智能变送器安装指南吉林省华煤机电技术有限责任公司编2009年2月声明:本资料主要是使用于ST300型100系列和900系列的几种型号变送器,只作为安装此系列变送器的便携指南。
详情请参考原产品配套的用户手册。
第一节开始1.1有关主要事项特殊限制:必须使用屏蔽的双绞(Belden9318)作为信号线和电源线。
必须仅在电源接线侧将屏蔽侧接地,并且在变送器侧保持绝缘。
1.2初步检查系列与型号数据霍尼韦尔的ST3000智能变送器主要包括两个系列:100系列900系列每一台变送器都带一个铭牌,上面表明了该变送器的特定“型号号码”。
例如:基本类型仪表本体法兰组件选项工厂标示关键号表1 表2 表3 表4STD120 ——E1H ——0000 ——SB,1C ——####查看关键号码的第三位和第四位,确认产品的系列和基本类型。
第三位上的字母代表的下面的变送器基本类型:A = 绝对压力D= 压差F= 法兰安装G= 表压力R= 远传压力第四位上的数字则对应变送器所属的系列。
也就是说,“1”表明该变送器为100系列;而“9”则表明该变送器为900系列。
与ST3000变送器的通讯与ST3000变送器的通讯可以通过使用下列的任一界面完成:●霍尼韦尔手提智能现场通讯器(SFC)●可在不同个人电脑(PC)平台上运行的Smartline配置工具包(SCT3000)●如果变送器与霍尼韦尔的TPS系统进行了数据集成,可使用全球通用工作站(GUS)一般客户常选择使用SCT。
SCT3000Smartline配置工具包可使用Wivindows98 或更高版本软件的PC平台上运行。
它是一种与微软软件捆绑打造一起的PC接口硬件,可对现场仪器进行快速,准确的配置。
第二节检测关于试验台检测试验台检测是一项可选的程序,可以利用它在变送器安装之前进行检测。
具体的检测方法如下:●将变送器与电源及SFC(或一台运行的SCT3000软件的PC)相连●使用SFC(或SCT3000)进行通讯测试●检查运行状态及配置数据当使用SCT3000时,可以提供关于配置说明和设备模板的在线帮助,以便对变送器进行配置工厂校验每一台ST300变送器在装运之前都进行了工厂校验。
ST3000/900智能压力变送器
应用领域:
差压测量,压力测量,与节流装置配合进
行流量测量,液位测量,界面测量。
一、概述
ST3000系列压力变送器是以微处理器为基础的智能变送器。
最新推出的R300版本,全面提升了变送器的精度、可靠性及长期稳定型指标。
他能测量各种液体和气体的压力,并输出对应的4~20mA模拟信号。
它独特的温度和静压误差自动修正功能使其能满足苛刻的使用环境。
它具有DE通讯协议,可与霍尼韦尔的Experion PKS™集散控制系统和智能现场通讯器(SFC)实现双向数字通讯,消除了模拟信号传输误差,方便了变送器的调试、校验和故障诊断。
二、产品特点
➢先进的传感技术:
采用离子注入硅技术,在差压传感器上继承了静压和温度传感器,随时修正过程温度和静压引起的误差,提高了测量精度和稳定性。
➢高可靠性:平均无故障时间470年。
➢高稳定性:±0.015%/年。
➢高精度:±0.065%。
➢测量范围宽:
➢STG944 0-3.5MPa
➢STG974 0-21 MPa
➢规格齐全:
接液部分有各种防腐材料备选,能满足各种工况条件下的使用,特殊要求,请与我公司联系。
➢具备各种本安和隔爆认证。
➢可选HART协议。
➢可选现场总线(FF)通讯协议。
➢使用现场通讯器或MCT多协议通讯器实现对ST3000变送器的组态、校验和故障诊断等。
➢可通过便携电脑,用SCT组态工具组态。
➢可与霍尼韦尔Experion PK集散控制系统实现数字一体化。
➢体积小、重量轻:4.1Kg。
三、适用场合
电力,冶金,石油、石化,化工,造船,建材(水泥、玻璃等),水处理,制药,造纸,食品及烟草,气象等工矿场合。
隔离膜片材料316L SS,哈氏合金C-276
选型说明
主型号选择可选项
表Ⅰ-表体
表Ⅱ
表Ⅲ-可选项
表Ⅳ
选择限制表
限制字母
只允许不允许表选择表选择
b 从该组仅可选择一个选项
c Ⅰ_ _G
d ⅢDN,B1
h Ⅰ_2_
i Ⅲ1C或2J
m ⅢSM
n Ⅲ1C,2J
o ⅢCR或B1
r ⅢTC,ME,4G,3A s ⅢFF,ME
t 从表Ⅲ中选择转换接头S1或T1
u Ⅲ1C或2J
w ⅠE_A,F_A ⅢSV
x ⅢFF,SM
y Ⅰ
ⅢE_A,F_A
DN
ⅢSV
z ⅡSTG974。