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C-RS Ultrasonic Flow Transducer Installation Guide

1. Introduction

The

Model C-RS

clamp-on ultrasonic flow transducer for liquids is used exclusively with the GE line of ultrasonic

flowmeters. These transducers measure the flow rate of sonically-conductive liquids through pipes having diameters
from 2 in. (5 cm) to over 300 in. (7.6 m). Such measurements are typically independent of the pipe material.

2. Transducer Construction

C-RS transducers may be used at process temperatures from -40 to 302

F (-40 to 150

C). Each C-RS transducer

assembly consists of the following components (see Figure 1):

•

A stainless steel adapter with 3/4” NPT male thread for attaching a junction box

•

A transducer that consists of a piezoelectric element mounted on a wedge and wired to the BNC connector

•

A BNC style connector for use in connecting the transducer to the flowmeter.

Note:

The process temperature range specified above is for ATEX certified designs. Consult the factory for higher
temperatures.

Figure 1: General C-RS Transducer Assembly

BNC Connector

Transducer Body

Adapter

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Страница 1: ...GE Measurement Control Solutions Flow 916 077 Rev C July 2010 CModel C RS Ultrasonic Flow Transducer Installation Guide ...

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Страница 3: ...SensingInspection com 2010 General Electric Company All rights reserved Technical content subject to change without notice Model C RS Ultrasonic Flow Transducer Installation Guide 916 077 Rev C July 2010 ...

Страница 4: ...ii no content intended for this page ...

Страница 5: ...ts 6 5 3 The Double Traverse Method UCF 8 5 4 The Single Traverse Method UCF 11 5 5 Mounting Transducers into the UCF 17 6 Installing the General Clamping Fixture and Transducers GCF 20 6 1 The Double Traverse Method GCF 20 6 2 The Single Traverse Method GCF 24 6 3 Mounting Transducers into the GCF 28 6 4 Installing the Magnetic Clamping Fixture and Transducers MCF 31 6 5 Identifying the MCF Compo...

Страница 6: ...Contents iv C RS Ultrasonic Flow Transducer Installation Guide no content intended for this page ...

Страница 7: ...are met for each installation Auxiliary Equipment Local Safety Standards The user must make sure that he operates all auxiliary equipment in accordance with local codes standards regulations or laws applicable to safety Working Area WARNING Auxiliary equipment may have both manual and automatic modes of operation As equipment can move suddenly and without warning do not enter the work cell of this...

Страница 8: ...t could impact health and the environment In order to avoid the dissemination of those substances in our environment and to diminish the pressure on the natural resources we encourage you to use the appropriate take back systems Those systems will reuse or recycle most of the materials of your end life equipment in a sound way The crossed out wheeled bin symbol invites you to use those systems If ...

Страница 9: ... RS transducers may be used at process temperatures from 40 to 302oF 40 to 150oC Each C RS transducer assembly consists of the following components see Figure 1 A stainless steel adapter with 3 4 NPT male thread for attaching a junction box A transducer that consists of a piezoelectric element mounted on a wedge and wired to the BNC connector A BNC style connector for use in connecting the transdu...

Страница 10: ...temporary use as well as for high and low temperature applications For long term installations make sure the couplant does not dry or run out Standard couplants supplied by GE are listed in Table 1 4 Preparing for Installation Before the clamping fixture and transducers can be properly installed you must do the following Choose an installation location Prepare the pipe Obtain the transducer spacin...

Страница 11: ...accuracy of the flowmeter a straight section of pipe and a fully developed flow profile are highly recommended If such conditions are not possible the transducer location should be such that the acoustic signal travels through the full distribution of the under developed flow profile for best repeatability 2 Place the transducers as close as possible to the horizontal plane of the pipe see Figure ...

Страница 12: ...ducer spacing for the installation Refer to your flowmeter User s Manual for more details 4 4 Determining the Number of Traverses The next step in the installation is to determine the number of traverses that you will use The transducers can be mounted using one of two methods see Figure 3 on the next page Note The number of traverses refers to the number of times the ultrasonic signal transmitted...

Страница 13: ...tallation Guide 5 4 4 Determining the Number of Traverses cont Figure 3 Double and Single Traverse Installations Double Traverse V Method Single Traverse Z Method Ultrasonic Signal Path Transducer Transducer Transducers TOP VIEW TOP VIEW ...

Страница 14: ...er the single or double traverse method However the pipe size ranges listed in Table 2 below must be followed for each method Note The mounting chain or strap provided by GE with your UCF is the one best suited for your application 5 2 Identifying the UCF Components The UCF includes the following components see Figure 4 on page 7 Two adjustable short blocks for use in the double traverse method Tw...

Страница 15: ...uide 7 5 2 Identifying the UCF Components cont Figure 4 Components of the UCF End View Side View Locking Nut Short Block 1 Screw Hook Long Block 2 Screw Hooks Thumbscrew Chain Example with Short Blocks Slide Track fixed and adjustable Pressure Bolt ...

Страница 16: ...ture is easier to install Note You will only need the short block assembly for a double traverse installation The long block is not used To install a double traverse UCF complete the following steps 1 Obtain the transducer spacing dimension as described in your flowmeter User s Manual 2 Be sure the location you have chosen for the installation has a straight pipe and undisturbed flow for at least ...

Страница 17: ...from each other As shown below use either the pressure bolts or the ends of the blocks as reference points 5 Position the clamping fixture along the horizontal plane of the pipe not on the top or bottom Make sure the chains are both on the opposite side of the pipe from the slide track with the ruler S Spacing S Spacing S Spacing Centerline Centerline Side View ...

Страница 18: ...hook on the blocks tighten the chains until the fixture is secured snugly to the side of the pipe Note Make sure the chains are perpendicular to the clamping fixture and are not twisted If the chains are slanted the fixture may move and this could change the final transducer spacing Figure 5 shows a completed double traverse installation without transducers Figure 5 Double Traverse Clamping Fixtur...

Страница 19: ...eps 1 Obtain the transducer spacing dimension as described in your flowmeter User s Manual 2 Be sure the location you have chosen for the installation has a straight pipe and undisturbed flow for at least 10 pipe diameters upstream and 5 pipe diameters downstream from the flow measurement point 3 Prepare the pipe where you intend to place the clamping fixture by making sure it is clean and free of...

Страница 20: ... line at the top of the pipe The distance between these two marks must equal the calculated transducer spacing S 6 From one of the marks measure around the circumference of the pipe a distance equal to 1 4 of the pipe circumference Make a crossmark at this point Spacing Mark Mark Side View Spacing Crossmark Side View ...

Страница 21: ... for 1 4 of the circumference Make another crossmark at this point 8 Center the long block over one of the crosssmarks on the pipe Align the long block so that the pressure bolt is over the center of the crossmark Fasten the block by wrapping both chains around the pipe and fastening the chains to the screw hooks on the opposite side of the block Spacing Crossmark Side View Fasten Chains ...

Страница 22: ...nd are not twisted If the chains are slanted the fixture may move and this could change the final transducer spacing 10 Position the clamping fixture rails so that one of the short blocks is placed over the remaining crossmark on the opposite side of the pipe and the pressure bolt is over the center of the crossmark Make sure the block does not lie on top of the long block chains Top View Tighten ...

Страница 23: ...on the opposite side from the ruler 12 Tighten the pressure bolt all the way down on the short block that is NOT positioned over a crossmark This will act as a reminder that a transducer in NOT installed in that block 13 Use the screw hooks to tighten the chains on the fixed and adjustable short blocks until the blocks are secured snugly to the pipe Note Make sure the chains are perpendicular to t...

Страница 24: ...ransducer Installation Guide 5 4 The Single Traverse Method UCF cont Figure 6 shows a completed single traverse installation without the transducers Figure 6 Single Traverse Clamping Fixture w o Transducers Side View Top View S ...

Страница 25: ...alant to the transducer threads A sealant is not required for installations in the USA but a sealant must be used for installations in EU countries 2 Before mounting the transducers into the UCF thread the electrical junction box onto the BNC connector end of the transducer Make sure that at least five full threads are engaged Be sure to orient the cover of the junction box so it is accessible to ...

Страница 26: ...d fit into the dimple in the transducer body Hand tighten the bolt just enough to hold the transducer in place Do not overtighten the bolt or the clamping fixture may lift off the pipe 6 Tighten the locking nut on the pressure bolt see Figure 4 on page 7 IMPORTANT When using the UCF on a pipe subject to mechanical vibration the locking nut must be used to secure the pressure bolt to the transducer...

Страница 27: ...s in Figure 7 Note If you have mounted the transducers into the UCF properly the two transducer cable connectors will face away from each other as shown below Figure 7 Completed UCF Installations with Transducers WARNING Before performing the next step make sure power to the flowmeter electronics has been disconnected 9 Make the transducer cable connections as described in the flowmeter User s Man...

Страница 28: ...roved because the signal is in contact with the fluid longer than with a single traverse method This configuration can reduce some effect of an underdeveloped flow profile If there is enough pipe length available the double traverse fixture is easier to install You will need a level and a marker or scribe to locate and mark the transducer locations on the pipe To install a double traverse GCF comp...

Страница 29: ...ipe The distance between these two marks must equal the calculated transducer spacing S 6 From each of the marks measure around the circumference of the pipe in the same direction a distance equal to 1 4 of the pipe circumference Make a crossmark at each point Line Top of Pipe Side View Spacing Mark Mark Side View Spacing Crossmarks Side View ...

Страница 30: ...ecure the block by wrapping the two straps around the block and the pipe and tightening them Make sure the turnbuckles are at least 1 2 pipe diameter away from the block 8 Repeat Step 7 to install the other block over the other crossmark Note Make sure the straps are perpendicular to the bottom of the blocks If the straps are slanted the blocks may move and this could change the final transducer s...

Страница 31: ...w Transducer Installation Guide 23 6 1 The Double Traverse Method GCF cont Figure 9 shows a double traverse installation without the transducers Figure 9 Double Traverse GCF Installation w o Transducers Top View End View ...

Страница 32: ...osen for the installation has a straight pipe and undisturbed flow for at least 10 pipe diameters upstream and 5 pipe diameters downstream from the flow measurement point 3 Prepare the pipe where you intend to place the clamping fixture by making sure it is clean and free of loose material Sanding though usually not required may be necessary to remove any high spots on the pipe When sanding be car...

Страница 33: ...ks measure around the circumference of the pipe a distance equal to 1 4 of the pipe circumference Make a crossmark at this point 7 From the second mark on the top of the pipe measure in the opposite direction around the pipe for 1 4 of the circumference Make another crossmark at this point Top View Spacing Crossmark ...

Страница 34: ...rk Secure the block by wrapping two straps around the block and the pipe and tightening them Make sure the turnbuckles are at least 1 2 pipe diameter away from the block 9 Repeat Step 8 to install the other block over the other crossmark Note Make sure the straps are perpendicular to the bottom of the blocks If the straps are slanted the blocks may move and this could change the final transducer s...

Страница 35: ... Transducer Installation Guide 27 6 2 The Single Traverse Method GCF cont Figure 10 shows a single traverse installation without the transducers Figure 10 Single Traverse GCF Installation w o Transducers Top View End View ...

Страница 36: ...ng the transducers into the clamping fixture To mount the transducers into the GCF complete the following steps 1 Apply a thread sealant to the transducer threads A sealant is not required for installations in the USA but a sealant must be used for installations in EU countries 2 Before mounting the transducers into the GCF thread the electrical junction box onto the BNC connector end of the trans...

Страница 37: ...ion box faces away from the mounting block as shown below Note If the transducer cables are already connected to the flowmeter you must identify the upstream and downstream cables and connect them to the appropriate transducers 5 Use the pressure bolt on the block to secure one of the transducers in place The pressure bolt should fit into the dimple in the transducer body Hand tighten the bolt jus...

Страница 38: ...questing a special clamping fixture and specifying either the thread lock or the washers See typical completed GCF installations in Figure 11 Note If you have mounted the transducers into the UCF properly the two transducer cable connectors will face away from each other as shown below Figure 11 Completed GCF Installations with Transducers WARNING Before performing the next step make sure power to...

Страница 39: ...e single and double traverse installations Each type of MCF has magnets at both ends of the fixtures When the magnets are turned ON the fixture magnetically clamps to the pipe wall 6 5 Identifying the MCF Components Refer to Figure 12 to identify the MCF components Then proceed to the instructions for either the double traverse method or the single traverse method Figure 12 Transducer Block and Ma...

Страница 40: ...le If there is enough pipe length available the double traverse fixture is easier to install To install a double traverse MCF complete the following steps 1 Obtain the transducer spacing dimension as described in your flowmeter User s Manual 2 Be sure the location you have chosen for the installation has a straight pipe and undisturbed flow for at least 10 pipe diameters upstream and 5 pipe diamet...

Страница 41: ...the adjustable magnetic blocks in the same manner as the transducer blocks 6 Position the clamping fixture along the horizontal plane of the pipe However if the pipe is horizontal do not place the fixture on either the top or bottom of the pipe 7 Turn the switches on each magnet to the ON position 8 If provided secure the optional safety chain The safety chain prevents the fixture from falling off...

Страница 42: ...ple traverse method However you must use an ODD number of traverses Consult the factory for details To install a single traverse MCF complete the following steps 1 Obtain the transducer spacing dimension as described in your flowmeter User s Manual 2 Be sure the location you have chosen for the installation has a straight pipe and undisturbed flow for at least 10 pipe diameters upstream and 5 pipe...

Страница 43: ... line at the top of the pipe The distance between these two marks must equal the calculated transducer spacing S 6 From one of the marks measure around the circumference of the pipe a distance equal to 1 4 of the pipe circumference Make a crossmark at this point Spacing Mark Mark Side View Spacing Crossmark Side View ...

Страница 44: ...rews slide the block to the desired location and tighten the thumbscrews Use the pressure bolt as the measuring point for the block Repeat for the other fixture section Note If you are using a fixture with two transducer blocks adjust one block as described above and push the unused block all the way to one side of the rail Tighten the pressure bolt all the way down on the unused block This will a...

Страница 45: ...0 Turn the switches on both magnets to the ON position 11 Repeat steps 9 and 10 to mount the other fixture section on the opposite side of the pipe 12 If provided secure the optional safety chain The safety chain prevents the fixture from falling off the pipe if the magnets fail to hold Top View ...

Страница 46: ...ng the transducers into the clamping fixture To mount the transducers into the GCF complete the following steps 1 Apply a thread sealant to the transducer threads A sealant is not required for installations in the USA but a sealant must be used for installations in EU countries 2 Before mounting the transducers into the MCF thread the electrical junction box onto the BNC connector end of the trans...

Страница 47: ...event the loss of couplant do not slide the transducer with couplant along the surface of the pipe when mounting 4 Place the two transducers into the blocks Make sure the junction box faces away from the mounting block as shown below Note If the transducer cables are already connected to the flowmeter you must identify the upstream and downstream cables and connect them to the appropriate transduc...

Страница 48: ...king nut on the pressure bolt as shown below Note If you have mounted the transducer into the MCF properly the junction box will face away from the center of the fixture as shown below 7 Repeat Steps 1 to 6 to mount the other transducer in the remaining block IMPORTANT When using the MCF on a pipe subject to mechanical vibration the locking nut must be used to secure the pressure bolt to the trans...

Страница 49: ...ing the fixture with the optional safety chain or a tether leash to prevent injury if the fixture falls off the pipe Figure 13 Completed MCF Installations with Transducers WARNING Before performing the next step make sure power to the flowmeter electronics has been disconnected 8 Make the transducer cable connections as described in the flowmeter User s Manual Double Traverse Installation Top View...

Страница 50: ...t If necessary loosen the locking nut with a wrench Refer to Installing the Transducers to insert a new transducer No cleaning is required Couplant Verify every 6 months in dry areas e g the desert Verify every 12 months in other areas Measure the signal strength using the flowmeter diagnostics and compare it to the value taken at the time of installation Good and bad limits are listed in the flow...

Страница 51: ...15 cm diameter Operating Frequency 0 5 MHz 1 0 MHz 2 0 MHz Electrical Rating 200 V peak to peak 5 mA Ambient Temperature Range 40 to 167 F 40 to 75 C Process Temperature Range 40 to 302 F 40 to 150 C North American Certification Explosion proof Class I Division 1 Group B C D European Certification Flameproof II 2 GD EEx md IIC T6 80 C Tam 40 to 75o C 40 to 167o F KEMA 02ATEX2337 X North American C...

Страница 52: ...44 C RS Ultrasonic Flow Transducer Installation Guide no content intended for this page ...

Страница 53: ...ing determines that the equipment was defective the warranty period is one year from delivery for electronic or mechanical failures one year from delivery for sensor shelf life If GE Sensing determines that the equipment was damaged by misuse improper installation the use of unauthorized replacement parts or operating conditions outside the guidelines specified by GE Sensing the repairs are not co...

Страница 54: ...ensing instructs you to send your instrument to a service center it must be shipped prepaid to the authorized repair station indicated in the shipping instructions 3 Upon receipt GE Sensing will evaluate the instrument to determine the cause of the malfunction Then one of the following courses of action will then be taken If the damage is covered under the terms of the warranty the instrument will...

Страница 55: ...s used EN 50014 1997 A1 A2 1999 EN 50018 2000 EN 50028 1987 following the provisions of the 2004 108 EC EMC 2006 95 EC Low Voltage and 94 9 EC ATEX Directives Where products were initially assessed for compliance with the Essential Health and Safety Requirements of the ATEX Directive 94 9 EC using earlier harmonized standards a subsequent review has determined that technical knowledge is unaffecte...

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Страница 58: ...Certified Company www gesensinginspection com en about_us quality html Customer Support Centers U S A The Boston Center 1100 Technology Park Drive Billerica MA 01821 U S A Tel 800 833 9438 toll free 978 437 1000 E mail sensing ge com Ireland Sensing House Shannon Free Zone East Shannon County Clare Ireland Tel 353 0 61 470291 E mail gesensingsnnservices ge com ...

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