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GE C-PT Installation Manual

Ultrasonic flow transducer
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GE
Measurement & Control Solutions
Flow
C-PT Ultrasonic Flow Transducer
Installation Guide
916-074 Rev. B
July 2010

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  • Page 1 Measurement & Control Solutions Flow C-PT Ultrasonic Flow Transducer Installation Guide 916-074 Rev. B July 2010...
  • Page 3 C-PT Ultrasonic Flow Transducer Installation Guide 916-074 Rev. B July 2010 GESensingInspection.com ©2010 General Electric Company. All rights reserved. Technical content subject to change without notice.
  • Page 4 [no content intended for this page]...

  • Page 5: Table Of Contents

    Installing C-PT Transducers for the TransFlection Method ........
  • Page 6 Contents [no content intended for this page] C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 7 Make sure that operators and maintenance personnel have all safety equipment applicable to the auxiliary equipment. Examples include safety glasses, protective headgear, safety shoes, etc. Unauthorized Operation Make sure that unauthorized personnel cannot gain access to the operation of the equipment. C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 8 Environmental Compliance Waste Electrical and Electronic Equipment (WEEE) Directive GE Measurement & Control Solutions is an active participant in Europe’s Waste Electrical and Electronic Equipment (WEEE) take-back initiative, directive 2002/96/EC. The equipment that you bought has required the extraction and use of natural resources for its production. It may contain hazardous substances that could impact health and the environment.

  • Page 9: Introduction

    1. Introduction The C-PT ultrasonic flow transducer is used exclusively with the GE line of ultrasonic flowmeters. These transducers measure the flow rate of sonically-conductive liquids through pipes having diameters between 2 in. (5 cm) and over 300 in. (760 cm). Such measurements are typically independent of the pipe material.

  • Page 10: Measurement Methods

    Figure 1: General C-PT Transducer Assembly 3. Measurement Methods C-PT transducers can be installed using a number of configurations and clamping fixtures; however, how this is done largely depends on the flowmeter’s measurement mode. Although many of GE flowmeters have one mode called Transit-time, some GE flowmeters have an additional measurement mode called TransFlection.

  • Page 11: Couplants

    4. Couplants GE supplies an ultrasonic couplant for your C-PT installation. The purpose of the couplant is to provide reliable transmission of ultrasound between two adjacent solid surfaces. Generally speaking, couplants perform this task by excluding air from between the adjacent surfaces. Accordingly, the C-PT transducers should be pressed tightly against the pipe, using hand pressure on the set screw to squeeze the couplant to as thin a film as practical for the given pipe surface.

  • Page 12: Installing C-Pt Transducers For The Transit-Time Method

    5. Installing C-PT Transducers for the Transit-time Method Installing the C-PT transducers consists of determining the number of traverses, mounting the clamping fixture to the pipe and then mounting the transducers into the clamping fixture. Use the sections that follow to properly install the fixture and transducers.
  • Page 13 5.1 Determining the Number of Traverses (cont.) Double Traverse (“V” Method) Transducers Ultrasonic Signal Path TOP VIEW Single Traverse (“Z” Method) Transducer Transducer TOP VIEW Figure 2: Double- and Single-Traverse Installations C-PT Ultrasonic Flow Transducer Installation Guide...

  • Page 14: Installing The Universal Clamping Fixture - Ucf

    The transducer installation consists of mounting the UCF to the pipe and then mounting the transducers into the fixture. Refer to the appropriate section that follows for instructions: • Double-traverse Method - page 8 • Single-traverse Method - page 11 C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 15 End View Side View Pressure Bolt Counter Nut Thumbscrew Short Block 1 Screw Hook (fixed and adjustable) Chain Long Block 2 Screw Hooks Slide Track Example with Short Blocks Figure 3: Components of the UCF C-PT Ultrasonic Flow Transducer Installation Guide...

  • Page 16: The Double-Traverse Method -Ucf

    EVEN 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. For more than two traverses, consult the GE factory. There are three advantages to using the double-traverse method: •...
  • Page 17 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. The slack may also change the transducer spacing after the transducers are mounted. C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 18 5.2c 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. Side View Top View Figure 4: A Double-Traverse Clamping Fixture Installation (w/o transducers) C-PT Ultrasonic Flow Transducer Installation Guide...

  • Page 19: The Single-Traverse Method - Ucf

    4. Find the top of the pipe and use a level to draw a line parallel to the pipe’s axis. Top of Pipe Line Side View C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 20 Spacing Crossmark Side View 7. From the other mark, go in the other direction around the pipe for one quarter the circumference and make another crossmark. Spacing Crossmark Side View C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 21 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. Tighten Tighten Screw Screw Hooks Hooks Top View Top View C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 22 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 not install the transducer in that block. C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 23 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. Side View Top View Figure 5: Single-Traverse Clamping Fixture Installation without Transducers C-PT Ultrasonic Flow Transducer Installation Guide...

  • Page 24: Mounting Transducers Into The Ucf

    5.2e Mounting Transducers into the UCF The last step of installation is mounting the transducers into the clamping fixture. C-PT transducers are manufactured with a dimple on top of the transducer body. In addition, there are scribe marks on each side.
  • Page 25 Do not overtighten so that the fixture lifts off the pipe. CAUTION FOR ATEX CERTIFIED INSTALLATIONS To ensure against impact to the transducer face, it must always be mounted flush to the pipe. Pressure Bolt Top View C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 26 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 ordered from GE by requesting a special clamping fixture and specifying either the thread lock or the washers.

  • Page 27: Installing The General Clamping Fixture - Gcf

    EVEN 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. For more than two traverses, consult the GE factory. There are three advantages in using the double-traverse method: •...
  • Page 28 Sanding, though usually not required, may be necessary to take off any high spots. Be careful to preserve the original curvature of the pipe. 4. Find the top of the pipe and use a level to draw a line parallel to the pipe’s axis. Top of Pipe Line Side View C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 29 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 fixture. Turnbuckles Top View C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 30 The slack may also change the transducer spacing after the transducers are mounted. Top View Figure 8 shows a double-traverse installation without transducers. Proceed to Mounting Transducers into the GCF on page 27. Top View End View Figure 8: A Double-Traverse GCF Installation without Transducers C-PT Ultrasonic Flow Transducer Installation Guide...

  • Page 31: The Single-Traverse Method - Gcf

    4. Find the top of the pipe and use a level to draw a line parallel to the pipe’s axis. Top of Pipe Line Side View 5. Make two marks on the line equal to the transducer spacing distance S, as calculated by the meter. Spacing Mark Mark Side View C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 32 Make a crossmark with a marker or scribe. Spacing Crossmark Side View 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 C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 33 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 spacing after the transducers are mounted. Top View C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 34 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. Top View End View Figure 9: A Single-Traverse GCF Installation without Transducers C-PT Ultrasonic Flow Transducer Installation Guide...

  • Page 35: Mounting Transducers Into The Gcf

    5.3c Mounting Transducers into the GCF The last step of installation is mounting the transducers into the clamping fixture. C-PT transducers are manufactured with a dimple on top of the transducer body. In addition, there are scribe marks on each side.
  • Page 36 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 ordered from GE by requesting a "special" clamping fixture and specifying either the thread lock or the washers.
  • Page 37 Single-Traverse Installation (Top View) 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. C-PT Ultrasonic Flow Transducer Installation Guide...

  • Page 38: Installing The Magnetic Clamping Fixture - Mcf

    • Double-traverse Method - page 31 • Single-traverse Method - page 33 Magnetic Block Transducer Block Pressure Bolt Optional Safety Chain ON/OFF Switch Counter Nut Thumbscrews Rails Figure 11: Transducer Block and Magnetic Block C-PT Ultrasonic Flow Transducer Installation Guide...

  • Page 39: The Double-Traverse Method - Mcf

    To move the block, loosen the red thumb screws, slide the block to the desired location and tighten the thumb screws. Use the pressure bolt or the edge of the block as the measuring point for the block. Select one method to set spacing C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 40 8. If provided, secure the safety chain. The safety chain prevents the fixture from falling of the pipe in the event the magnet releases. on page 37. 9. Proceed to Mounting Transducers into the MCF C-PT Ultrasonic Flow Transducer Installation Guide...

  • Page 41: The Single-Traverse Method - Mcf

    4. Find the top of the pipe and use a level to draw a line parallel to the pipe’s axis. Top of Pipe Line Side View C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 42 Use a marker or scribe to make a crossmark. Spacing Crossmark Side View 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 C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 43 9. Center the block over one of the marks on the pipe. Align it such that the pressure bolt on the transducer block is right over the center of the crossmark. Pressure Bolt Top View 10. Turn the switches on each magnet to the ON position. C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 44 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. C-PT Ultrasonic Flow Transducer Installation Guide...

  • Page 45: Mounting Transducers Into The Mcf

    5.4d Mounting Transducers into the MCF The last step of installation is mounting the transducers into the clamping fixture. C-PT transducers are manufactured with a dimple on top of the transducer body. In addition, it also has scribe marks on each side.
  • Page 46 Do not overtighten so that the fixture lifts off the pipe. WARNING! Do not tighten the pressure bolt so that the magnet separates from the pipe. Pressure Bolt Counter Nut Top View C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 47 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 ordered from GE by requesting a "special" clamping fixture and specifying either the thread lock or the washers.

  • Page 48: Installing C-Pt Transducers For The Transflection Method

    6. Installing C-PT Transducers for the TransFlection Method Before making measurements using the TransFlection method, you must install the transducers properly. Like transit time measurement, TransFlection requires two transducers. The transducers are mounted on the pipe using a TransFlection Mode Clamping Fixture (TMCF) that is clamped around the pipe with a chain or strap. Since the TMCF...
  • Page 49 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. If necessary, the distance can be adjusted later. Quick-Release Pin C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 50 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 C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 51 7. Proceed to Mounting the Transducers into the TransFlection Mode Clamping Fixture - TMCF on page 37. Figure 13 shows an example of a completed <180 installation without transducers. End View Side View Figure 13: Completed <180 Installation without Transducers C-PT Ultrasonic Flow Transducer Installation Guide...

  • Page 52: Mounting The Tmcf In A 180O Configuration

    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 estimate the distance. If necessary, the distance can be adjusted later. C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 53 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 Fixture - TMCF on page 47. C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 54 6.1b Mounting the TMCF in a 180 Configuration (cont.) Figure 14 shows an example of a completed 180 installation without transducers. End View End View Top View Top View Figure 14: Completed 180 Installation without Transducers C-PT Ultrasonic Flow Transducer Installation Guide...

  • Page 55: Mounting The Transducers Into The Transflection Mode Clamping Fixture - Tmcf

    6.2 Mounting the Transducers into the TransFlection Mode Clamping Fixture - TMCF The last step of installation is mounting the transducers into the clamping fixture. C-PT transducers are manufactured with a dimple on top of the transducer body. In addition, there are scribe marks on each side.
  • Page 56 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 ordered from GE by requesting a "special" clamping fixture and specifying either the thread lock or the washers.
  • Page 57 8. Make transducer cable connections as described in the Installation chapter of the Startup Guide. Viewing Angle Viewing Angle End View End View Figure 15: Examples of Completed TMCF Installations with Transducers in <180 Configuration C-PT Ultrasonic Flow Transducer Installation Guide...

  • Page 58: Maintaining The C-Pt Transducers

    Configuration 7. Maintaining 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 section in this document.

  • Page 59: Specifications

    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 Range: C-PT-N Normal: -4 to +122°F (-20 to +50°C) C-PT-M Medium: -4 to +293°F (-20 to +145°C) C-PT-H High: -4 to +363°F (-20 to +184°C)

  • Page 60: Hazardous Area Certifications

    North American Certification - Explosionproof: Class I, Division 1, Group C, D, Class II, Division 1, Group E, F, G, Class III. European Certification - Flameproof: GE Sensing, 221 Crescent St., Waltham, MA 02453, USA C-PT KEMA03ATEX1147X: 1180 II 2 G EEx md IIC T6 - T2...
  • Page 61 AUTHORIZATION NUMBER (RAN), and shipping instructions for the return of the instrument to a service center will be provided. 2. If GE Sensing 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.
  • Page 62 Warranty [no content intended for this page] C-PT Ultrasonic Flow Transducer Installation Guide...
  • Page 63 Shannon Industrial Estate Shannon, County Clare Ireland declare under our sole responsibility that the C-PT-N, C-PT-M, and C-PT-H Ultrasonic Flow Transducers CXL Ultrasonic Flow Transducer to which this declaration relates, are in conformity with the following standards: • EN 50014:1997+A1+A2:1999 •...
  • Page 65 Shannon Industrial Estate Shannon, County Clare Ireland déclarons sous notre propre responsabilité que les C-PT-N, C-PT-M, and C-PT-H Ultrasonic Flow Transducers CXL Ultrasonic Flow Transducer rélatif á cette déclaration, sont en conformité avec les documents suivants: • EN 50014:1997+A1+A2:1999 • EN 50018:2000 •...
  • Page 67 Panametrics Limited Wir, Shannon Industrial Estate Shannon, County Clare Ireland erklären, in alleiniger Verantwortung, daß die Produkte C-PT-N, C-PT-M, and C-PT-H Ultrasonic Flow Transducers CXL Ultrasonic Flow Transducer folgende Normen erfüllen: • EN 50014:1997+A1+A2:1999 • EN 50018:2000 • EN 50028:1987 •...
  • Page 69 II 2 G EEx md IIC T6-T3 KEMA03ATEX1147X 200 V , 5 mA, -20°C to 60°C (C-PT-H, C-PT-M), -20°C to 50°C (C-PT-N) 1180 Furthermore, the following additional requirements and specifications apply to the product: • Having been designed in accordance with EN 50014, EN 50018 and EN50028, the product meets the fault tolerance requirements of electrical apparatus for categories “d”...
  • Page 72 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 An ISO 9001:2000 Certified Company www.gesensinginspection.com/en/about_us/quality.html...

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