YOKOGAWA VY Series Manual
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Summary of Contents for YOKOGAWA VY Series
- Page 1 User’s Vortex Flowmeter Manual VY Series Maintenance Manual IM 01F07A01-02EN IM 01F07A01-02EN 1st Edition...
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Page 2: Table Of Contents
Installing the Amplifier Unit ................13 Removing and Installing the Shedder Bar ............14 Replacing the Lightning Protector Module ............. 17 Calculation Formulas ..................18 Revision Information ................... 21 1st Edition: Feb. 2022 IM 01F07A01-02EN All Rights Reserved, Copyright © 2022, Yokogawa Electric Corporation... -
Page 3: Introduction
• Yokogawa assumes no responsibilities for this product except as stated in the warranty. • If the customer or any third party is harmed by the use of this product, Yokogawa assumes no responsibility for any such harm owing to any defects in the product which were not predictable, or for any indirect damages. - Page 4 When these precautions are not complied with, the protection functions of this instrument may be impaired or instrument functions may not be fully demonstrated. In this case, Yokogawa makes no guarantee whatsoever for the quality, performance, functions, and safety of the product.
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Page 6: Using This Instrument Safely
(2) Modification Yokogawa will not be liable for malfunctions or damage resulting from any modification made to this instrument by the customer. (3) Product Disposal The instrument should be disposed of in accordance with local and national legislation/ regulations. -
Page 7: Warranty
„ • "HART" is the registered trademark of FieldComm Group. • All the brands or names of Yokogawa Electric's products used in this manual are either trademarks or registered trademarks of Yokogawa Electric Corporation. • Product names and company names in this document are trademarks or registered trademarks of the respective companies. -
Page 8: Handling Precautions
This section describes the precautions to follow when handling the product. Be sure to read this section before using the product. For information other than that described in this section, refer to the related section. If you have any problems or questions, contact your nearest YOKOGAWA service center or sales representative. Checking Model and Specifications This instrument is inspected thoroughly before it is shipped from the factory. -
Page 9: Transportation And Storage Precautions
<2. Handling Precautions> Transportation and Storage Precautions To prevent damage to the vortex flowmeter due to accidents during transportation, it should be carried in its original packing condition. Deterioration of insulation, corrosion or other abnormalities may occur due to unexpected situations if the vortex flowmeter is stored for a long period of time after it is delivered to the user site. -
Page 10: Maintenance
• If there is no lubricant on the O-rings, apply silicone-based grease. CAUTION Repairs and modifications to this instrument can only be performed at the Yokogawa factory. The orientation of the transmitter case and sensor terminal box can be changed in 90-degree increments (four directions). -
Page 11: Removing And Rotating The Indicator
<3. Maintenance> Removing and Rotating the Indicator IMPORTANT In the case of an explosion protected type instrument, modification by the user is prohibited. WARNING • In the case of an explosion protected type instrument, make sure that no explosive atmosphere conditions are present. •... - Page 12 <3. Maintenance> Follow the procedure below to remove and rotate the indicator. (1) Turn the power OFF. (2) Remove the cover. When opening the cover of a flameproof type instrument, turn the locking screws to the right to unlock the cover. (3) Loosen the two indicator mounting screws.
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Page 13: Removing The Amplifier Unit
<3. Maintenance> Removing the Amplifier Unit IMPORTANT Do not twist the amplifier unit when removing or installing it. Doing so may damage the connector pins. WARNING • In the case of an explosion protected type instrument, make sure that no explosive atmosphere conditions are present. •... -
Page 14: Installing The Amplifier Unit
<3. Maintenance> Installing the Amplifier Unit IMPORTANT Make sure to follow the procedure below when installing the amplifier unit. The amplifier unit may not function properly if it is installed without following the procedure exactly as described. Follow the procedure below to install the amplifier unit. (1) Place the amplifier unit in the transmitter case so that the flat side at the top of the amplifier unit fits against the flat surface inside the transmitter case. -
Page 15: Removing And Installing The Shedder Bar
IMPORTANT • The accuracy is not guaranteed after removing and replacing the shedder bar. If you require an accuracy guarantee, we recommend having the Yokogawa factory perform shedder bar removal and replacement. • Shedder bar replacement should be performed by trained personnel with knowledge of the product characteristics and safety. - Page 16 <3. Maintenance> (1) Remove the four transmitter case mounting bolts shown in Figure 3.5, and remove the transmitter case from the bracket. Shedder bar mounting bolts Transmitter case mounting bolts Sensor Cable Bracket mounting bolts Gasket F0304.ai Figure 3.5 Removing the Shedder Bar CAUTION The sensor cable is connected to the transmitter case.
- Page 17 <3. Maintenance> c. Check that the pin of the shedder bar fixing block is aligned with the pin hole of the shedder bar as shown in Figure 3.6. Upstream Downstream F0307.ai Figure 3.7 Shedder Bar F0305.ai Installation Figure 3.6 Installing the Shedder Bar Direction d.
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Page 18: Replacing The Lightning Protector Module
After assembly, make sure that no fluid leaks from the vortex flowmeter. Replacing the Lightning Protector Module For details on replacing the lightning protector module, read the Vortex Flowmeter VY Series Installation Manual listed in the related documents in Table 1.1. -
Page 19: Calculation Formulas
<3. Maintenance> Calculation Formulas (1) Flow rate calculation The flow rate is calculated based on the following formulas, where N is the count number of generated vortices. a) Instantaneous flow rate (actual flow rate unit) (RATE) RATE = N×1 /∆t×ε ×ε ×ε ×1 / KT×U ×U KT = KM×U / {1+Et (T -15)×10 b) Instantaneous flow rate (%) (RATE (%)) - Page 20 <3. Maintenance> (2) Flow rate unit conversion coefficient (Uk) The flow rate conversion coefficient Uk is calculated according to the measured fluid and the selected flow rate unit, as indicated below. a) Steam For M (mass): = ρ ×U ×U (kg) ρf For Q (flow rate): b) Gas For Q (flow rate):...
- Page 21 <3. Maintenance> b) Gas In the case of gas, perform temperature/pressure correction based on the measured temperature value, and calculate the volumetric flow rate at normal conditions. For the pressure, use the fixed value input in the parameters or the analog input value from an external pressure gauge.
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Page 22: Revision Information
Revision Information Title: Vortex Flowmeter VY Series Maintenance Manual Edition Date Page Revised Item Feb. 2022 New publication IM 01F07A01-02EN...
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