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C-PT Ultrasonic Flow Transducer Installation Guide

5

5.1 Determining the Number of Traverses (cont.)

Figure 2: Double- and Single-Traverse Installations

Double Traverse (“V” Method)

Single Traverse (“Z” Method)

Ultrasonic Signal Path

Transducer

Transducer

Transducers

TOP VIEW

TOP VIEW

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Summary of Contents for C-PT

Page 1: ...GE Measurement Control Solutions Flow 916 074 Rev B July 2010 C PT Ultrasonic Flow Transducer Installation Guide ...

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Page 3: ...GESensingInspection com 2010 General Electric Company All rights reserved Technical content subject to change without notice C PT Ultrasonic Flow Transducer Installation Guide 916 074 Rev B July 2010 ...

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

Page 5: ...ng Fixture GCF 19 5 3a The Double Traverse Method GCF 19 5 3b The Single Traverse Method GCF 23 5 3c Mounting Transducers into the GCF 27 5 4 Installing the Magnetic Clamping Fixture MCF 30 5 4a Identifying the MCF Components 30 5 4b The Double Traverse Method MCF 31 5 4c The Single Traverse Method MCF 33 5 4d Mounting Transducers into the MCF 37 6 Installing C PT Transducers for the TransFlection...

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

Page 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...

Page 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 ...

Page 9: ...ransducers page 50 Specifications page 51 2 Transducer Construction Each C PT transducer assembly consists of the following components see Figure 1 on page 2 a metallic cover with 1 2 NPT male thread for attaching a junction box a transducer that consists of a peizo electric element mounted on a wedge and wired to the BNC connector a BNC style connector for use in connecting the transducer to the ...

Page 10: ...rious digital signal processing techniques including cross correlation to determine transit times and then uses these times to calculate flow velocity 3 2 TransFlection Method To measure flow one transducer transmits a group of pulses typically 16 pulses at regular intervals approximately 5 000 to 10 000 transmissions sec The ultrasonic pulses travel through the liquid reflect off scatterers i e b...

Page 11: ...l order of preference gels grease propylene glycol oil glycerine and water Long term couplants include grease epoxy adhesive and solid rubber like sheet couplant GE provides couplants for both permanent and 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 from GE are listed in T...

Page 12: ... the same side of the pipe and the ultrasonic signal is bounced from one transducer to the other off the opposite pipe wall Single traverse method Z method transducers are mounted diagonally across from each other The ultrasonic signal is transmitted directly from one transducer to the other across the pipe For pipe diameters from 4 to 20 in always try the double traverse method because it is easi...

Page 13: ...tallation Guide 5 5 1 Determining the Number of Traverses cont Figure 2 Double and Single Traverse Installations Double Traverse V Method Single Traverse Z Method Ultrasonic Signal Path Transducer Transducer Transducers TOP VIEW TOP VIEW ...

Page 14: ...omponents The UCF has two adjustable short blocks that are used for the double traverse method Two slide tracks connect the blocks A ruler attached to one of the tracks helps set the transducer spacing For single traverse methods a long block is also used The blocks are used to hold the transducers in position for accurate measurement The UCF is chained or strapped around the pipe The blocks are p...

Page 15: ...ide 7 5 2b Identifying the UCF Components cont Figure 3 Components of the UCF End View Side View Counter Nut Short Block 1 Screw Hook Long Block 2 Screw Hooks Thumbscrew Chain Example with Short Blocks Slide Track fixed and adjustable Pressure Bolt ...

Page 16: ...e transducer spacing and fastening the fixture on the pipe Please note you will only need the short block assembly for a double traverse installation the long block is not used 1 Obtain the transducer spacing dimension S as described in the programming section of the Startup Guide 2 Be sure the location you have chosen for the installation has at least 10 pipe diameters of straight undisturbed flo...

Page 17: ...he chain around the pipe and fasten the chain on the J screw hook on the opposite side of the block Do this for both blocks 7 Using the screw 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 slack may cause the fixture to move around...

Page 18: ... The Double Traverse Method UCF cont Figure 4 shows a completed double traverse installation without transducers Proceed to Mounting Transducers into the UCF on page 16 Figure 4 A Double Traverse Clamping Fixture Installation w o transducers Side View Top View ...

Page 19: ...u will need a marker or scribe to locate and mark the transducer locations on the pipe Do the following 1 Obtain the transducer spacing dimension S as described in the programming section of the Startup Guide 2 Be sure the location you have chosen for the installation has at least 10 pipe diameters of straight undisturbed flow upstream and 5 pipe diameters downstream of the measurement point 3 Pre...

Page 20: ... meter 6 From one of the marks measure around the circumference of the pipe a distance equal to one quarter the pipe s circumference and make a crossmark with the marker or scribe 7 From the other mark go in the other direction around the pipe for one quarter the circumference and make another crossmark Spacing Mark Mark Side View Spacing Crossmark Side View Spacing Crossmark Side View ...

Page 21: ...ng both chains around the pipe and fastening the chains to the screw hooks on the opposite side of the block 9 Use the wing nuts to tighten the chains on the long block until it is secured snugly to the pipe Note Make sure both chains are perpendicular to the bottom of the block and are not twisted If the chains are slanted the slack will cause the block to slide Fasten Chains Top View Fasten Chai...

Page 22: ... of the long block 11 Wrap the chain around the pipe and fasten the chain to the screw hook on the opposite side of the block Do this for both short blocks Note Make sure the chains on both blocks are on the same side of the fixture and are opposite the ruler 12 Tighten the pressure bolt all the way down on the short block that is NOT positioned over the crossmark This will act as a reminder to no...

Page 23: ...hains are perpendicular to the clamping fixture and are not twisted If the chains are slanted the slack will cause the blocks to slide The slack may also change the transducer spacing after the transducers are mounted Figure 5 shows a completed single traverse installation without transducers Proceed to Mounting Transducers into the UCF on page 16 Figure 5 Single Traverse Clamping Fixture Installa...

Page 24: ...not required within the US however a sealant must be used in European Communities 2 Before mounting the transducers thread the junction box onto the end of the transducer with the BNC connector Ensure that at least five full threads are engaged Make sure to orient the cover of the junction box so it is accessible to make cable connections once the box is installed 3 Take one of the transducers and...

Page 25: ...upstream and downstream directions of the pipe and place the transducers into the appropriate blocks 5 Use the pressure bolt to secure the transducer in place The pressure bolt should fit into the dimple Hand tighten enough to hold the transducer in place Do not overtighten so that the fixture lifts off the pipe CAUTION FOR ATEX CERTIFIED INSTALLATIONS To ensure against impact to the transducer fa...

Page 26: ...special clamping fixture and specifying either the thread lock or the washers 7 Repeat Steps 1 to 6 to mount the other transducer in the remaining block 8 Tighten the thumbscrews on the short blocks to make sure the block is secure on the rail See Figure 6 on page 18 for completed UCF installations WARNING Before performing the next step make sure the power to the flowmeter electronics is disconne...

Page 27: ...riate section that follows for instructions Double traverse Method below Single traverse Method page 23 Figure 7 General Clamping Fixture Block 5 3a The Double Traverse Method GCF Note The instructions in this section can also be used for a multiple traverse method However you must use an EVEN number of traverses The distance the signal travels from one side of the pipe wall to the opposite side o...

Page 28: ...S as described in the programming section of the Startup Guide 2 Be sure the location you have chosen for the installation has at least 10 pipe diameters of straight undisturbed flow upstream and 5 pipe diameters downstream of the 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 requ...

Page 29: ...ual to one quarter the pipe s circumference Make a crossmark with a marker or scribe 7 Center one of the blocks over one of the crossmarks on the pipe Align the block so that the pressure bolt is over the center of the mark Secure the block by wrapping the two straps around the block and pipe and tightening them Make sure the turnbuckles are at least 1 2 pipe diameter away from the clamping fixtur...

Page 30: ...pendicular to the bottom of the block If the straps are slanted the slack will cause the block to slide The slack may also change the transducer spacing after the transducers are mounted Figure 8 shows a double traverse installation without transducers Proceed to Mounting Transducers into the GCF on page 27 Figure 8 A Double Traverse GCF Installation without Transducers Top View Top View End View ...

Page 31: ...n the transducer spacing dimension S as described in the programming section of the Startup Guide 2 Be sure the location you have chosen for the installation has at least 10 pipe diameters of straight undisturbed flow upstream and 5 pipe diameters downstream of the measurement point 3 Prepare the pipe where you intend to place the GCF by making sure it is clean and free of loose material Sanding t...

Page 32: ...sure around the circumference of the pipe a distance equal to one quarter the pipe s circumference Make a crossmark with a marker or scribe 7 From the other mark go in the opposite direction around the pipe for one quarter the circumference and make another crossmark Spacing Crossmark Side View Spacing Crossmark Side View ...

Page 33: ...ng two straps around the block and pipe and tightening them Make sure the turnbuckles are at least 1 2 pipe diameter away from the clamping fixture 9 Repeat Step 8 to install the other block over the other punch mark Note Make sure both straps are perpendicular to the bottom of the block If the straps are slanted the slack will cause the block to slide The slack may also change the transducer spac...

Page 34: ...Guide 5 3b The Single Traverse Method GCF cont Figure 9 shows a single traverse installation without transducers Proceed to Mounting Transducers into the GCF on page 27 Figure 9 A Single Traverse GCF Installation without Transducers Top View End View ...

Page 35: ...not required within the US however a sealant must be used in European Communities 2 Before mounting the transducers thread the junction box onto the end of the transducer with the BNC connector Ensure that at least five full threads are engaged Make sure to orient the cover of the junction box so it is accessible to make cable connections once the box is installed 3 Take one of the transducers and...

Page 36: ...ple Hand tighten enough to hold the transducer in place Do not overtighten so that the fixture lifts off the pipe 6 Tighten the counter nut on the pressure bolt see above IMPORTANT When using the GCF in a pipe location with possible mechanical vibration the locking nut must be used to secure the position of the pressure bolt on the transducer after the bolt has been hand tightened into the transdu...

Page 37: ... disconnected 8 Make transducer cable connections as described in the Installation chapter of the Startup Guide Figure 10 Completed GCF Installations with Transducers Note If you have mounted the transducers into GCF properly the two transducer cable connectors will face away from each other as shown in Figure 10 Double Traverse Installation Top View Single Traverse Installation Top View ...

Page 38: ...ither end of the fixtures When the magnets are turned ON the fixture magnetically clamps to the pipe wall To properly mount the MCF you should become familiar with the components of each type of fixture 5 4a Identifying the MCF Components Refer to Figure 11 to identify these components then refer to one of the following sections to install the clamping fixture Double traverse Method page 31 Single...

Page 39: ...om one side of the pipe wall to the opposite side of the pipe wall is considered one traverse 1 Obtain the transducer spacing dimension S as described in the programming section of the Startup Guide 2 Be sure the location you have chosen for the installation has at least 10 pipe diameters of straight undisturbed flow upstream and 5 pipe diameters downstream of the measurement point 3 Prepare the p...

Page 40: ...netic block in the same manner as the transducer block 6 Position the clamping fixture along the horizontal plane of the pipe If the pipe is horizontal do not place the fixture on the top or bottom of the pipe 7 Turn the switches on each magnet to the ON position 8 If provided secure the safety chain The safety chain prevents the fixture from falling of the pipe in the event the magnet releases 9 ...

Page 41: ...tion Note The instructions in this section can also be used for a multiple traverse method However you must use an ODD number of traverses The distance the signal travels from one side of the pipe wall to the opposite side of the pipe wall is considered one traverse 1 Obtain the transducer spacing dimension S as described in the programming section of the Startup Guide 2 Be sure the location you h...

Page 42: ...the meter 6 From one of the marks measure around the circumference of the pipe a distance equal to one quarter the pipe s circumference Use a marker or scribe to make a crossmark 7 From the other mark go in the opposite direction around the pipe for one quarter the circumference and make another crossmark Spacing Mark Mark Side View Spacing Crossmark Side View Spacing Crossmark Side View ...

Page 43: ... measuring point for the block Repeat for the other fixture 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 act as a reminder to not install the transducer in that block 9 Center the block over one of the marks on the ...

Page 44: ... MCF cont 11 Repeat Steps 9 and 10 for the other fixture on the opposite pipe marking 12 If provided secure the safety chain The safety chain prevents the fixture from falling off the pipe in the event the magnet releases Proceed to Mounting Transducers into the MCF on page 37 Top View ...

Page 45: ... not required within the US however a sealant must be used in European Communities 2 Before mounting the transducers thread the junction box onto the end of the transducer with the BNC connector Ensure that at least five full threads are engaged Make sure to orient the cover of the junction box so it is accessible to make cable connections once the box is installed 3 Take one of the transducers an...

Page 46: ...e If the transducer cables are already connected you must determine the upstream and downstream directions of the pipe and place the transducers into the appropriate blocks 5 Use the pressure bolt to secure the transducer in place The pressure bolt should fit into the dimple Hand tighten enough to hold the transducer in place Do not overtighten so that the fixture lifts off the pipe WARNING Do not...

Page 47: ...Repeat Steps 1 to 6 to mount the other transducer in the remaining block See Figure 12 for completed installations WARNING Before performing the next step make sure the power to the flowmeter electronics is disconnected 8 Make transducer cable connections as described in the Installation chapter of the Startup Guide WARNING If your fixture is installed at an elevated location GE recommends securin...

Page 48: ... fixture Use this guide to properly install the fixture and transducers on your pipe 6 1 Mounting the TransFlection Mode Clamping Fixture TMCF The transducers can be mounted up to 180 apart around the circumference of the pipe The angle between the transducers is dependent on the size of the pipe Generally transducers are located opposite each other 180 on pipes 2 to 4 inches in diameter For pipes...

Page 49: ...aking sure it is clean and free of loose material Sanding though usually not required may be necessary to take off any high spots Be careful to preserve the original curvature of the pipe 3 If not already connected connect the bracket from each block using the quick release pin The distance between the blocks depends on where you are placing them on the pipe You only need to estimate the distance ...

Page 50: ...tion the fixture with the two blocks in a common axial plane of the pipe but not on the top or bottom of the pipe 5 Wrap the chains around the pipe and fasten them to the screw hooks on the other block If necessary adjust the distance between the blocks Note Make sure the chains are not twisted End View End View ...

Page 51: ...ly against the pipe Note Make sure the blocks are in a common axial plane so the chains are not slanted If the chains are slanted the slack will allow the fixture to move around 7 Proceed to Mounting the Transducers into the TransFlection Mode Clamping Fixture TMCF on page 37 Figure 13 shows an example of a completed 180o installation without transducers Figure 13 Completed 180o Installation witho...

Page 52: ...he TMCF by making sure it is clean and free of loose material Sanding though usually not required may be necessary to take off any high spots Be careful to preserve the original curvature of the pipe 3 If not already connected connect the chain from one block to the screw hooks on the other block The distance between the blocks depends on where you are placing them on the pipe You only need to est...

Page 53: ...ning chains around the pipe and fasten them to the screw hooks on the other block Make sure the chains on either side of the pipe are approximately the same length 6 Tighten and or loosen the chains using the screw hooks on both blocks to fine tune the angle between the blocks Make sure the chains are not twisted or slanted 7 Proceed to Mounting the Transducers into the TransFlection Mode Clamping...

Page 54: ...allation Guide 6 1b Mounting the TMCF in a 180o Configuration cont Figure 14 shows an example of a completed 180o installation without transducers Figure 14 Completed 180o Installation without Transducers Top View End View End View Top View ...

Page 55: ...e transducer threads A sealant is not required within the US however a sealant must be used in European Communities 2 Before mounting the transducers thread the junction box onto the end of the transducer with the BNC connector Ensure that at least five full threads are engaged Make sure to orient the cover of the junction box so it is accessible to make cable connections once the box is installed...

Page 56: ... drawing above IMPORTANT When using the TMCF in a pipe location with possible mechanical vibration the locking nut must be used to secure the position of the pressure bolt on the transducer after the bolt has been hand tightened into the transducer dimple For additional resistance to vibration a thread lock compound or a stainless steel washer and lock washer may also be used These items can be or...

Page 57: ... WARNING Before performing the next step make sure the power to the flowmeter electronics is disconnected 8 Make transducer cable connections as described in the Installation chapter of the Startup Guide Figure 15 Examples of Completed TMCF Installations with Transducers in 180o Configuration End View Viewing Angle Viewing Angle End View ...

Page 58: ...ing the C PT Transducers Once properly installed into the fixture the C PT transducers require no additional adjustments If you suspect something is wrong with a transducer or need to replace a transducer simply loosen the pressure bolt that secures the transducer in place and remove it If necessary loosen the counter locking nut with a wrench To insert a new transducer refer to the appropriate se...

Page 59: ...s a breaking capacity in accordance with the short circuit current of the supply Mounting Clamp on Material C PT cover is 316 Stainless Steel Pipe Sizes 2 to 300 diameter and larger Pipe Material All Frequency 200 kHz 500 kHz 1 0 MHz and 2 0 MHz Electrical Rating 200 V peak to peak 5 mA Ambient Temperature Range C PT N 4 to 122 F 20 to 50 C C PT M and H 4 to 140 F 20 to 60 C Process Temperature Ra...

Page 60: ...opean Certification Flameproof GE Sensing 221 Crescent St Waltham MA 02453 USA C PT KEMA03ATEX1147X 1180 II 2 G EEx md IIC T6 T2 Serial Mfg Date C PT N 20 C Tamb 50 C 200 Vpp 5 mA C PT M H 20 C Tamb 60 C 200 Vpp 5 mA Certified Model String Ultrasonic Flow Transducer Model CPT aa b c aa Frequency 02 200KHz 05 500KHz 10 1MHz or 20 2MHz b Process Temperature N Normal M Medium or H High c Connector Ty...

Page 61: ... a particular purpose and warranties arising from course of dealing or usage or trade Return Policy If a GE Sensing instrument malfunctions within the warranty period the following procedure must be completed 1 Notify GE Sensing giving full details of the problem and provide the model number and serial number of the instrument If the nature of the problem indicates the need for factory service GE ...

Page 62: ...Warranty 54 C PT Ultrasonic Flow Transducer Installation Guide no content intended for this page ...

Page 63: ...87 II 2 G EEx md IIC T6 or T3 C PT N M H KEMA03ATEX1147 X CXL KEMA03ATEX1459 X KEMA Ultrechtseweg 310 Arnhem The Netherlands EN 61326 1998 Class A Annex A Continuous Unmonitored Operation following the provisions of the 89 336 EEC EMC Directive and the 94 9 EC ATEX Directive The units listed above and any ancillary sample handling systems supplied with them do not bear CE marking for the Pressure ...

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Page 65: ...H KEMA03ATEX1147 X CXL KEMA03ATEX1459 X KEMA Ultrechtseweg 310 Arnhem The Netherlands EN 61326 1998 Class A Annex A Continuous Unmonitored Operation suivant les régles de la Directive de Compatibilité Electromagnétique 89 336 EEC et d ATEX 94 9 EC Les matériels listés ci dessus ainsi que les systèmes d échantillonnages pouvant être livrés avec ne portent pas le marquage CE de la directive des équi...

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Page 67: ...C T6 or T3 C PT N M H KEMA03ATEX1147 X CXL KEMA03ATEX1459 X KEMA Ultrechtseweg 310 Arnhem The Netherlands EN 61326 1998 Class A Annex A Continuous Unmonitored Operation gemäß den Europäischen Richtlinien Niederspannungsrichtlinie EMV Richtlinie Nr 89 336 EG und ATEX Richtlinie Nr 94 9 EG Die oben aufgeführten Geräte und zugehörige mitgelieferte Handhabungssysteme tragen keine CE Kennzeichnung gemä...

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Page 69: ...ade during operation Only trained competent personnel may install operate and maintain the equipment The product has been designed so that the protection afforded will not be reduced due to the effects of corrosion of materials electrical conductivity impact strength aging resistance or the effects of temperature variations The product cannot be repaired by the user it must be replaced by an equiv...

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Page 72: ...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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