Principle of Operation, －４７－, ６Ｆ８Ａ０８７０

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Toshiba LF414 manual －４７－, ６Ｆ８Ａ０８７０, Square-Wave Excitation .1 Principle of Operation

Contents

６Ｆ８Ａ０８７０６Ｆ８Ａ０８７０－１－About Safety Precautions Integral type LF414/LF600F, LF414/LF610F, LF414/LF620F SAFETY PRECAUTIONS Explanation of signal wordsSafety symbols －２－ SAFETY PRECAUTIONS Safety Precautions for Installation and Wiring －３－DON’T „ Do not modify or disassemble the enclosure SAFETY PRECAUTIONS continued Safety Precautions for Installation and WiringDON’T －４－ Safety Precautions for Maintenance and Inspection Warranty and Limitation of LiabilityUsage limitation －５－ Handling Precautions －６－・Places where excessive vibration or mechanical shock occurs 2 Wire cables correctly and securely Handling Precautions continued －７－ Table of Contents －８－ 1. Product Inspection and Storage 1.1 Product Inspection1.2 Strage －９－ Features 2. Overview－１０－ 5 Intelligent functions 3. Names of Parts 3.1 Appearance3.1.1 Appearance of LF414/LF600F, LF414/LF610F Integral 1 Meter size of 1/2 inch 15mm 2 Meter size of 1inch 25mm －１２－Figure 3.1.2 Appearance of LF414/LF600F, LF610F Meter size 1 inch25mm Ground terminal for converter 3 Meter size of 1 1/2 to 4 inch 40 to 100mm －１３－Figure 3.1.3 Appearance of LF414/LF600F, LF610F Meter size 1 1/2 to 4 inch 40 to 100mm 4 Meter size of 6 and 8 inch 150 and 200mm －１４－Lifting Lugs provided 3.1.2 Appearance of LF414/LF620F －１５－Figure 3.1.5 Appearance of LF414/LF620F Meter size 1/2inch15mm Ground terminal for converter Flow direction arrow Detector －１６－ Figure 3.1.6 Appearance of LF414/LF620F Meter size 1 inch25mmGround terminal for converter Flow direction arrow －１７－ Figure 3.1.7 Appearance of LF414/LF620F －１８－ Figure 3.1.8 Appearance of LF414/LF620FMeter size 6 and 8 inch 150 and 200mm Ground terminal for converter Lifting Lugs 3.1.3 Appearance of LF414 Separate 1 Meter size of 1/2 inch 15mm－１９－ Signal cable －２０－ for Signal cableFigure 3.1.10 Appearance of LF414 Meter size 1 inch25mm for Excitation cable －２１－ Signal cableFigure 3.1.11 Appearance of LF414 Excitation cable －２２－ Figure 3.1.12 Appearance of LF414Meter size 6 and 8 inch150 and 200mm Signal cable terminal 3.2 Construction of the terminal blocks3.2.2 Terminal Block Construction of LF414 Type －２３－ 4. Installation Safety Precautions for Installation－２４－ „ Use an appropriate device to carry and install 4.1 Notes on Selecting the Installation Location 4.2 Mounting Procedure 4.2.1 Pipe checks－２５－ 2. Avoid places where excessive pipe vibration occurs －２６－ Figure 4.2 Example of Pipe Fixing ProcedureFigure 4.3 Model Diagram of Unsupported Pipes 4.2.2 Installation Procedure －２７－Figure 4.4 LF414 flowmeter detector piping connections －２８－ Table 4.1 Bolt length and Nut tightening torque 1a Ideal Upstream Straight Pipe Length Installation Requirements 1b Optional “Mount Anywhere” Installation Mount-Anywhere Technology4.3 Piping Connections L=5D 2 Pipe Orientation －３０－Figure 4.6 Installation position of the detector Figure 4.5 Detector Piping Orientation 3 Flow Direction 4 Preventing an Empty Pipe Condition－３１－ Figure 4.7 Flow direction arrow on the detector 4.4 Grounding 1 Grounding of the LF414/LF620F type－３２－ Figure 4.10 Grounding the LF414/LF620F Type 2 Grounding of the LF414 type －３３－ 5.Wiring Safety Precautions for Wiring－３４－６Ｆ８Ａ０８７０－３５－„ Install a switch and fuse to isolate the independently from power equipment. 100 ohm Notes on wiring 5.1 Cables－３６－ Table 5.1 Installation Cables 5.3 Notes on Wiring 5.3.1 Notes on Instrumentation-Converter Wiring 5.3.2 Notes on Wiring of the Separate type LF4145.2 External Device Connections and Grounding －３７－ 5.4 Wiring 5.4.1 Terminal Treatment of Cables 1 Power cable, current output cable, digital I/O cablesSeparate 2 Excitation cable －３８－ 3 Connecting the input signal cable Notes on signal cable shield processing work－３９－ Figure 5.3 Terminal Treatment of Flow Rate Signal Cable 5.4.2 Cable Connection －４０－Figure 5.5 Connecting a Cable to Terminal Block 6. Operation Preparatory check－４１－ „ Check the wiring between the converter and related instruments 7. Maintenance and Troubleshooting Safety precaution for Maintenance and Troubleshooting－４２－ „ Do not conduct wiring work when power is applied 7.1 Maintenance „ CleaningCheck/Replacement of the display unit materials 7.2 Troubleshooting 7.2.1 Flow rate is not indicated－４４－ START Are power supplies correct NO for each device? YES 7.2.2 Flow rate indicated is not correct －４５－Perform the zero adjustment Refer to combined converters manual Clean the inside of the detector pipe 7.2.3 Flow rate indication is not stable －４６－Is power supply voltage Use a power supply within the specified range 8. Principle of Operation －４７－Square-Wave Excitation Figure 8.1 Principle of Operation 9. Specifications 9.1Specifications－４８－ Measurement range in terms of flow velocity －４９－ Electrical conductivity μS/cmFigure 9.1 Electrical Conductivity vs. Cable Length －５０－ Table 9.1 Standard Flow Range －５１－ Table 9.2 Flow velocity vs. flow volumeUnit gal/min Unit m3/h Table 9.3 Type Specification Code －５２－9.2 Type Specification Code Table 9.4 Type Specification Code Exciting Cable and Signal Cable －５３－Exciting cable length Nominal cross-sectional area Overall diameter 10. Outline Dimensions 10.1 Outline dimensions of LF414/LF600F, LF414/LF610F1 Meter size of 1/2 inch 15mm 2 Meter size of 1 inch 25mm 3 Meter size of 1 1/2 to 8 inch 40 to 200mm －５５－ 10.2 Outline dimensions of LF414/LF620F －５６－Waight approx 9 lb 4kg －５７－ 10.3 Outline dimensions of LF414 －５８－Waight approx 7 lb 3kg －５９－ Appendix 1-1 A system block diagram for LF414/LF600F, LF414/LF610F －６０－ 1-2 A system block diagram for LF414/LF620F －６１－ 2-1 A system block diagram for LF414 －６２－－６３－ Distributor Address NamePhone number （ Product code FCF50017

Toshiba LF414 manual Principle of Operation, －４７－, ６Ｆ８Ａ０８７０

Models: LF414