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<1.  Introduction>

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IM 01F07A01-02EN

1.  INTRODUCTION

Thank you for purchasing a VY Series Vortex Flowmeter. This manual describes maintenance 

procedures for VY Series Vortex Flowmeters. You can refer to the related manuals for this 

instrument listed in Table 1.1 in the Vortex Flowmeter VY Series Installation Manual (IM 

01F07A01-01EN). Manuals for each product can be downloaded from the Yokogawa website. Be 

sure to read these manuals to ensure correct use of the products.

Website address:

https://www.yokogawa.com/library/

 

„

 Regarding This Manual

•   This manual should be provided to the end user.
•   The contents of this manual may be changed without prior notice.
•   All rights are reserved. No part of this manual may be reproduced in any form without 

Yokogawa's written permission.

•   Yokogawa makes no warranty of any kind with regard to this material, including, but not 

limited to, implied warranties of merchantability and suitability for a particular purpose.

•   All reasonable effort has been made to ensure the accuracy of the contents of this manual. 

However, if any errors or omissions are found, please inform Yokogawa.

•   The specifications covered by this manual are limited to those for the standard type under 

the specified model number break-down and do not cover custom-made instruments.

•   Please note that this manual may not be revised for any specification changes, 

construction changes or operating part changes that are not considered to affect function or 

performance.

•   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.

 

„

 Safety and Modification Precautions

•   When handling this instrument, follow the safety precautions described in this document 

for protection and safety of personnel, this instrument and systems that incorporate this 

instrument. Yokogawa does not guarantee the safety of this instrument if the customer has 

failed to comply with these precautions.

•   Modification of the product in question without the authorization of Yokogawa is strictly 

forbidden.

•   When an explosion protected type instrument has been repaired or modified by the 

customer and cannot be restored to its original condition, the explosion protective structure 

of this instrument will be impaired and a hazardous condition will arise. Be sure to consult 

Yokogawa regarding repairs and modifications.

Summary of Contents for VY Series

Page 1: ...User s Manual Vortex Flowmeter VY Series Maintenance Manual IM 01F07A01 02EN IM 01F07A01 02EN 1st Edition...

Page 2: ...rage Precautions 8 3 MAINTENANCE 9 3 1 Changing the Orientation of the Transmitter Case and Sensor Terminal Box 9 3 2 Removing and Rotating the Indicator 10 3 3 Removing the Amplifier Unit 12 3 4 Inst...

Page 3: ...those for the standard type under the specified model number break down and do not cover custom made instruments Please note that this manual may not be revised for any specification changes construc...

Page 4: ...follows Functional ground terminal Direct current Handling precaution This is attached to locations where this manual must be referenced to protect personnel safety and devices When handling this ins...

Page 5: ...in accordance with local and national legislation regulations Table 1 1 Related Documents Document title Document No Vortex Flowmeter VY Series GS 01F07A00 01EN FSA130 Magnetic Flowmeter Vortex Flowm...

Page 6: ...ctronic components by for example wearing wrist straps to prevent charging by static electricity and not directly touching electronic components circuits and other components susceptible to static ele...

Page 7: ...resulting from handling operation or storage that violates the intended use and specifications Problems that result from using or performing maintenance on the instrument in a location that does not c...

Page 8: ...ected thoroughly before it is shipped from the factory When this instrument is delivered to the installation site check its external appearance for damage and make sure that all parts for installation...

Page 9: ...ould be as follows The preferred ambient temperature and humidity levels are 25 C and approximately 65 RH Ambient temperature 40 to 85 C Humidity 0 to 100 RH no condensation 3 When storing a vortex fl...

Page 10: ...ormed at the Yokogawa factory The orientation of the transmitter case and sensor terminal box can be changed in 90 degree increments four directions Follow the procedure below to change the orientatio...

Page 11: ...nd adhesion of foreign matter Replace O rings if they are damaged or deformed If there is no lubricant on the O rings apply silicone based grease CAUTION In the case of an explosion protected type ins...

Page 12: ...htening the screws and washers 6 When installing the indicator perform the removal procedure in reverse to return the parts to their original positions then tighten the indicator mounting screws The i...

Page 13: ...oreign matter Replace O rings if they are damaged or deformed If there is no lubricant on the O rings apply silicone based grease Follow the procedure below to remove the amplifier unit 1 Turn the pow...

Page 14: ...amplifier unit mounting guide pins into the mounting holes 3 Lightly press the upper and lower parts of the amplifier unit simultaneously to insert the amplifier unit into the transmitter case Take c...

Page 15: ...ent make sure that no explosive atmosphere conditions are present Before removing the shedder bar stop the flow and remove any remaining fluid When removing or installing the shedder bar pay careful a...

Page 16: ...tention to the sensor cable 3 Remove the shedder bar mounting bolts 2 to 10 bolts and washers then remove the shedder bar fixing block and shedder bar with attention to the sensor cable The instrument...

Page 17: ...Table 3 2 Partially tighten each bolt equally 3 to 4 times until the tightening torque value is reached Read Figure 3 8 for the bolt tightening sequence F1105 ai Upstream Number of bolts 2 Number of...

Page 18: ...49 3 74 3 49 3 VY150 0 VY200 1 69 98 69 VY200 0 69 98 69 VY250 0 157 210 140 VY300 0 157 210 140 VY400 0 160 240 140 1 For SPG stainless steel gasket plated with silver only 2 For ASME JPI Class 150...

Page 19: ...e Flow velocity V V N 1 t 1 KT UKT 4 D2 f Reynolds number Re Re V D f 1 1000 N Number of input pulses pulse t Time corresponding to N sec f Instrument error correction coefficient e Compressible fluid...

Page 20: ...low rate Uk Uk m3 For M mass Uk f U f Uk kg d For user specified units Uk Uk User 3 Mass flow rate calculation for instruments with built in temperature sensor and analog input a Steam In the case of...

Page 21: ...2 T1 T2 2 T2 T1 2 10 2 a2 k1 1 T2 k2 1 T1 T1 2 T2 T2 2 T1 10 6 kx 1 a1 Tx 10 2 a2 Tx 2 10 6 Tx Tx Tn x 1 2 M Mass flow rate Qn Volumetric flow rate at normal conditions Qf Volumetric flow rate at ope...

Page 22: ...21 IM 01F07A01 02EN Revision Information Title Vortex Flowmeter VY Series Maintenance Manual Edition Date Page Revised Item 1st Feb 2022 New publication...

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