Toshiba Electromagnetic Flowmeter LF470/LF612 Specification Sheet

Contents

specifications

TIC-LF470BField Intelligent Device SeriesElectromagnetic FlowmeterLF470/LF6121/10",1/6”,1/4" (2.5,4,6mm )IntroductionThe electromagnetic flowmeter uses Faraday’s Law ofelectromagnetic induction to measure the process flow.The device consists of two units: a detector, throughwhich the fluid to be measured flows and in whichlow-level signals proportional to flow rates are obtained;and a converter, which supplies excitation current to thedetector, and amplifies the signals from the detector andthen processes and converts the signals into the 4–20mA dc current signal. The LF470 is a small meter sizedetector designed to measure a small amount of fluidscontaining substances such as chemicals.The wetted materials for the LF470 are corrosionresistant ceramic and platinum electrods and areapplicable to almost any kind of fluids. The LF470 is alightweight palm-sized detector.Combined withmulti-functional converter LF612 (separate type) andLF232*1 (separate type) equipped with its patentedNoise-Sentry original noise-suppression circuit andadvanced algorithms. The LF470 is highly resistant tonoise and provides a stable output even for fluidscontaining slurries. IR (Infrared) switches enableparameter setting of the converter without removing thecover. Flow direction can be set in either way, and itsunique 128 x 128 dot matrix LCD display allows theLCD to be rotated electronically to be rotated to 90, 180and 270 degrees without opening the coverThe AF900 hand-held terminal (HART* 2 communicator)can be used to communicate with the flowmeter from aremote place. PROFIBUS-PA* 3 interface is availableas an option.*1: Please refer to the document ”TIC-LF232”.*2: HART protocol (Highway Addressable RemoteTransducer) is a communication protocol for industrialsensors recommended by the HCF (HART CommunicationFoundation).*3: PROFIBUS is the communication protocol for factoryand process automation that the PROFIBUS Organizationrecommends. Instead of analog control with aconventional analog signal (4-20mA), it is the fieldbuswhich digitizes all signals. Flowmeters supportPROFIBUS-PA.Figure 2. Electromagnetic FlowmeterLF470/LF612Specifications Overall SpecificationsMeasurement range in terms of flow velocity:0–1.0ft/s to 0–32.8ft/s (0–0.3 m/s to 0–10 m/s )Accuracy: The overall accuracy combined with theLF612 or LF232 converter is shown in thefollowing table.AccuracyFlow rate as apercent of range 1.0-3.3ft/s(0.3-1.0m/s ) 3.3-32.8ft/s(1.0-10m/s )50 100 0.8% of FS 0.8% of rate0 50 0.8% of FS 0.4% of FSNote: The accuracy is measured under standardoperating conditions at Toshiba's calibration facility.Fluid conductivity: 50μS/cm minimumFluid temperature:Pipe connection material Fluid temperatureStainless steel and other metals 14 to 248 °F( 10 120 )Polyvinyl chloride(shock-resistant)14 to 140 °F( 10 60 )Ambient temperature: 14 to 140 °F (–10 to +60 °C )Structure: IP67Power consumption:・When combined with the LF612 converter:approximately 12W (20VA)・When combined with the LF232 converter:approximately 14W (25VA)Fluid to bemeasuredSignal cableExcitation cablePower supply4-20mA dc outputand pulse outputFigure 1. Configuration DiagramLF470 LF612Certification numberZ01207LF612 or LF232ConverterLF470Detector