Manual do usuário Toshiba Electromagnetic Flowmeter LF470/LF612

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LF470/LF612
Field Intelligent Device Series

1/10",1/6”,1/4" (2.5,4,6mm )
Electromagnetic Flowmeter




Introduction

The electromagnetic flowmeter uses Faraday’s Law of

electromagnetic induction to measure the process flow.

The device consists of two units: a detector, through

which the fluid to be measured flows and in which

low-level signals proportional to flow rates are obtained;

and a converter, which supplies excitation current to the

detector, and amp

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TIC-LF470B Model LF470 Detectors Output signals - - Fluid pressure: 15 to 150 psi, or 1.0 to 10 bar Current output: (-0.1 to 1 MPa) 4–20mAdc (load resistance 0 to 750Ω ) Principal materials: Note: The current output cannot be used with the Measurement tube – Alumina ceramics PROFIBUS-PA communication. Electrodes – Platinum Digital outputs — One point (std.) and one more Pipe connection port: point is optionally available as follows. Standard – 316 stainless steel Option – Ti

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TIC-LF470B Power supply: Communications output ： One of the following can be selected: • HART (std.) — Digital signal is superimposed on • 100 to 240Vac, 50/60Hz (std.) 4–20mAdc current signal as follows: (allowable voltage 80 to 264Vac) Conforms to HART protocol • 24Vdc (allowable voltage 18 to 36Vdc) Load resistance: 240 to 750Ω • 110Vdc (allowable voltage 90 to 130Vdc) Load capacitance: 0.25µF maximum Load inductance: 4mH maximum Surge protection: • PROFIBUS(opt.) Arrester

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TIC-LF470B Installation Dimensions Unit : inch (mm) 2.20(56) Unit : inch (mm) 3.39(86) 2.95(75) 1.18(30) ** * * ** 1.46(37) Signal cable Detector mounting plate 2-φ0.24(φ6) hole Excitation cable (4mm thick) φ0.28(φ7) φ0.28(φ7) * 2.76(70) 4-φ0.20(φ5) hole Mounting screws * This length becomes 78mm if the pipe connection port thread is Rc(PT)1/2 Note: 1 inch = 25.4mm and Rc(PT)3/4. If a

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TIC-LF470B Separate type LF470/LF612 flowmeter Terminal board IV wire 2 5.5 mm or more Thick walled steel conduit Grounded with 100 Ω or less ground resistance Power switch (External double-pole power switch ) [Instrument panel : ordered separately] Grounded with 100 Ω or less Signal cable ground resistance (2-wire shielded hard-rubber Power supply sheathed cable) Current output (4~20mAdc) or PROFIBUS Digital output 1 Signal common for DI and DO Connected detector Digi

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TIC-LF470B Wiring Precautions About establishment environment (1) Connect the following two cables correctly: Do not store or install the flowmeter: 1) signal cable (on the right facing the LF470) • Where there is direct sunlight. 2) excitation cable (on the left facing the LF470) • Where excessive vibration or mechanical shock (2) Do not bend apply excessive force to these cables. occurs. Piping Precautions • Where high temperature or high humidity conditions (1) Connect

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TIC-LF470B Table 4. Specification Code ( LF470 Detector ) Model Specification Code Description 1 2 3 4 5 6 7 8 9 10 11 12 1314 L F 4 7 0 LF470 Flowmeter Meter size 2 1/10" (2.5 mm ) 4 1/6" (4 mm ) 6 1/4" (6 mm ) Converter ( Separate type ) combined D LF612 E LF232 (Note 1) Pipe connection port (adapter) A Rc (PT) 1/4 female screw (standard) B Rc (PT) 1/8 femal

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TIC-LF470B Table 5. Specification Code for converters Model Specification Code Contents LF612 1 2 3 4 5 6 7 8 9 1011 12 13 14 type L F 6 1 Electromagnetic flowmeter converter 2 Separate (Remote) type Purpose A Standard Shape B Separate type with case Converter mounting fitting A None C Panel, Accessory for wall mounting (BNP material: SUS304) E Accessory for pipe insta