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GE Bently Nevada 7200 Series Installation Manual

14 mm proximity transducer system
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Table Of Contents
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Table of Contents

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Summary of Contents for GE Bently Nevada 7200 Series

  • Page 1 (217) 352-9330 | Click HERE Find the GE / Bently Nevada 81725-02 at our website:...
  • Page 2 Installation Manual 14 mm Proximity Transducer System 7200 Series Part Number 74756-01 Rev. G (07/07)
  • Page 3 The following are trademarks of General Electric Company in the United States and other countries: Proximitor Contact Information The following ways of contacting Bently Nevada are provided for those times when you cannot contact your local representative: Mailing Address 1631 Bently Parkway South Minden, Nevada USA 89423 Telephone 1.775.782.3611 1.800.227.5514 1.775.215.2873 Internet www.ge-energy.com/bently...
  • Page 4 Additional Information Product Disposal Statement Customers and third parties, who are not member states of the European Union, who are in control of the product at the end of its life or at the end of its use, are solely responsible for the proper disposal of the product.
  • Page 5 14 mm Proximity Transducer System 7200 Series Installation Manual Contents SYSTEM OVERVIEW ..............................1 INTRODUCTION..............................1 PROXIMITY MEASUREMENTS........................2 INSTALLATION ................................4 INTRODUCTION..............................4 RECEIVING INSPECTION AND STORAGE....................4 INSTALLATION CONSIDERATIONS ......................4 PROBE INSTALLATION............................. 7 PROXIMITOR INSTALLATION......................... 9 MAINTENANCE ................................12 INTRODUCTION..............................12 CALIBRATION CHECK ............................12 RECALIBRATION...............................14...
  • Page 6 Section 1 - SYSTEM OVERVIEW 1. SYSTEM OVERVIEW 1.1 INTRODUCTION The 7200 Series 14 Millimetre Proximity Transducer System is a noncontacting, shaft vibration and relative position measurement system. The system includes a probe and Proximitor. Figure 1-1 shows a typical system. The transducer system measures the gap between the probe tip and an observed metal surface and converts this distance to a proportional negative dc voltage.
  • Page 7 14 mm Proximity Transducer System 7200 Series Installation Manual The probe signal and the input power are transmitted between the Proximitor and a standard Bently Nevada monitor through a 3-wire shielded signal cable (provided by the user in most cases). The Proximitor can be up to 1000 feet (305 metres) from a monitor without degradation of performance.
  • Page 8 Section 1 - SYSTEM OVERVIEW Figure 1-2. Typical Thrust Position Probe Mounting This transducer system can also be mounted to measure radial vibration. Typically, two probes are mounted 90 degrees apart along the radial axis of a shaft. This enables vibration to be analyzed at all angles along the radial plane.
  • Page 9 14 mm Proximity Transducer System 7200 Series Installation Manual 2. INSTALLATION 2.1 INTRODUCTION This section covers inspection, storage, and installation of equipment as well as the actual installation procedures for the probe and Proximitor. 2.2 RECEIVING INSPECTION AND STORAGE All equipment should be removed from shipping containers and visually inspected to ensure there is no shipping damage.
  • Page 10 Section 2 - INSTALLATION the observed surface can cause electrical or mechanical runout which will introduce error in the Proximitor output. The various techniques for eliminating electrical and mechanical runout are described in several papers available from Bently Nevada Corporation, including: •...
  • Page 11 14 mm Proximity Transducer System 7200 Series Installation Manual false information will be generated. Side view can be avoided by proper gapping of the probe or by removing conductive material by counterboring. Figure 2-2. Proper Probe Tip Side Clearance Brackets or other structural members used to mount probes must be rigid. When using a mounting bracket, it should be field checked for resonant frequency.
  • Page 12 Section 2 - INSTALLATION 2.4 PROBE INSTALLATION Perform the following procedure to assure proper probe installation. The observed surface must remain motionless while gapping the probe. The probe can be gapped mechanically or electrically. Use either steps a and b or steps a and c. Before installing the probe into its mounting hole, ensure the tapped hole is free of foreign material.
  • Page 13 14 mm Proximity Transducer System 7200 Series Installation Manual The probe can also be gapped electrically by connecting the probe cable to the Proximitor (see CAUTION below). Apply the proper input voltage (-18 Vdc or -24 Vdc) to the Proximitor. Connect a digital multimeter to the Proximitor output.
  • Page 14 Section 2 - INSTALLATION The cable should be routed inside conduit connected to the enclosure which contains the Proximitor. Where the cable is installed in a conduit, care must be taken not to rub or cut the cable on sharp or rough surfaces.
  • Page 15 14 mm Proximity Transducer System 7200 Series Installation Manual include the isolation kits. For retrofit and conversion situations, Bently Nevada Corporation offers a Proximitor Isolation Kit (BNC P/N 19094-01). The probe is internally isolated to provide shield isolation at the probe end. The probe cable shield is physically connected to the Proximitor case which is isolated with FEP insulation.
  • Page 16 Section 2 - INSTALLATION Figure 2-4. Field Wiring and Shield Grounding for 7000, 7200, and 9000 Series Monitors...
  • Page 17 14 mm Proximity Transducer System 7200 Series Installation Manual 3. MAINTENANCE 3.1 INTRODUCTION This section contains calibration and troubleshooting procedures. The recommended maintenance equipment is given in Table 3-1. If the recommended equipment is not available, equivalent instruments can be used. Any maintenance performed by the user, other than that which is specified herein, may void the warranty.
  • Page 18 APPENDIX A Figure 3-1. Test Equipment Setup Adjust the micrometer to a 15 mil (0. 38 mm) indication, then back to a 20 mil (0. 51 mm) indication and record the output voltage. Going to the 15 mil (0. 38 mm) indication first will eliminate any play in the micrometer before taking the 20 mil reading.
  • Page 19 14 mm Proximity Transducer System 7200 Series Installation Manual 3.3 RECALIBRATION Perform the following procedure to recalibrate the transducer. Remove the protective assembly from the calibration resistor on the Proximitor (use a screwdriver to pry away the outer barrier). Desolder and remove the calibration resistor (see Figure 3-1).
  • Page 20 APPENDIX A Table 3-2. Fault Isolation and Correction FAULT INDICATION PROBABLE CAUSE ISOLATION AND CORRECTION Voltage between Prox. COM 1. Faulty power source. Disconnect output wiring from power source. Measure power source output and V terminals not within voltage. If not within range of -17.5 to -26 Vdc, replace the power source. range of -17.5 to -26 Vdc.
  • Page 21 14 mm Proximity Transducer System 7200 Series Installation Manual 4. APPENDIX A DRAWINGS AND ORDERING INFORMATION...
  • Page 22 APPENDIX A Figure A-1. 14 mm Probe Ordering Information...
  • Page 23 14 mm Proximity Transducer System 7200 Series Installation Manual Figure A-2. 14mm Proximitor Ordering Information...
  • Page 24 APPENDIX B Figure A-3. 14mm Extension Cable Ordering Information...
  • Page 25 14 mm Proximity Transducer System 7200 Series Installation Manual 5. APPENDIX B SPECIFICATIONS FOR THE 14 MM PROXIMITY TRANSDUCER SYSTEM...
  • Page 26 APPENDIX B SPECIFICATIONS FOR THE 14 MM PROXIMITY TRANSDUCER SYSTEM SYSTEM PERFORMANCE The following specifications apply at 72° F (22° C) with -24.0 ± 0.l Vdc supply, 10k ohm load, and AISI E4140 steel target; and when test equipment is used with accuracy as specified by BNC Specification 150980.
  • Page 27 14 mm Proximity Transducer System 7200 Series Installation Manual D. Deviation from best straight line -- approximately 20 to 180 mils (0.51 to 4.57 mm). Error is referenced to the straight line which is centered to yield minimum error and which has a 100 mV/mil (3.94 V/mm) slope.
  • Page 28 APPENDIX B 14 MM PROXIMITORS The following specifications apply at 72°F (22°C) with AISI E4140 steel target and when test equipment is used with accuracy as specified by BNC Specification 150980. A. Calibration Range 160 mils (4.06 mm) beginning at -2.0 Vdc -- approximately 20 to 180 mils (0.51 to 4.57 mm) B.
  • Page 29 14 mm Proximity Transducer System 7200 Series Installation Manual J. Output Noise Less than 10 millivolts peak-to-peak when terminated into a 0.01 microfarad capacitor load or a standard Bently Nevada monitor plus any high frequency noise which may be present on the supply K.
  • Page 30 APPENDIX B 14 MM PROBES The 7200 14 mm probe is available in many case styles, with or without armored probe cable, and with or without a connector. The following specifications apply at 72° F (22° C) with AISI E4140 steel target and when test equipment is used with accuracy as specified by BNC Specification 150980.
  • Page 31 14 mm Proximity Transducer System 7200 Series Installation Manual 0.025 mH E . Inductance F. Materials FEP/TFE Lead Jacket and Core Polyphenylene Sulfide (PPS) 300 Series Stainless Steel Case ETFE Armor (if Applicable) Shrink Tubing Silver-plated brass with TFE dielectric insert, Connector stainless steel nut G.
  • Page 32 APPENDIX B 14 MM EXTENSION CABLES A. Electrical Characteristics The following specifications apply at 72° F (22° C) with AISI E4140 steel target and when test equipment with accuracy as specified by Bently Nevada Corporation specification 150980 is used. Typical is defined as 90% (2 sigma) of extension cables built, and worst case is defined as 99.7% (3 sigma) of extension cables built.
  • Page 33 14 mm Proximity Transducer System 7200 Series Installation Manual B. Mechanical Characteristics Materials Jacket and Core -- FEP/TFE Shrink tubing -- FEP Tensile strength (connector-to-connector: 30 lbs) Recommended minimum bend radius: 1.00 inch (25.4 mm)
  • Page 34 APPENDIX C 6. APPENDIX C SCALE FACTORS AND SENSITIVITY CURVES...
  • Page 35 14 mm Proximity Transducer System 7200 Series Installation Manual Figure C-1. Incremental Scale Factor...
  • Page 36 APPENDIX C Figure C-2. Probe and One Foot Cable at Temperature...
  • Page 37 14 mm Proximity Transducer System 7200 Series Installation Manual Figure C-3. Probe and 9 Metres Cable at Temperature...
  • Page 38 APPENDIX C Figure C-4. 9 Metres Cable at Temperature...
  • Page 39 14 mm Proximity Transducer System 7200 Series Installation Manual Figure C-5. Typical Proximitor Supply Sensitivity...
  • Page 40 APPENDIX C Frequency Response 1000 10000 Frequency (Hz) 0 feet of cable 500 feet of cable 1000 feet of cable 2000 feet of cable 5000 feet of cable 12000 feet of cable Figure C-6. Frequency Response...
  • Page 41 14 mm Proximity Transducer System 7200 Series Installation Manual Phase Response -100 1000 10000 Frequency (Hz) 0 feet of cable 500 feet of cable 1000 feet of cable 2000 feet of cable 5000 feet of cable 12000 feet of cable Figure C-7.
  • Page 42 APPENDIX C Figure C-8. Effects of Flat Surface Side Clearance...
  • Page 43 14 mm Proximity Transducer System 7200 Series Installation Manual Figure C-9. Effects of Counterbore...

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