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14 mm Proximity Transducer System 7200 Series Installation Manual 

12 

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. 

 

Table 3-1.  Recommended Maintenance Equipment 

 

 

MAINTENANCE EQUIPMENT 

 

 

RECOMMENDED EQUIPMENT 

 

Digital Multimeter 

 

Test and Calibration Kit 

 

 

Variable Resistor 

 

Soldering Iron 

 

Power Supply 

 

 

Hewlett-Packard Model 3465 A/B 

 

Bently Nevada Corporation Model TK3-2E or 
TK3-2G 

 

0 to 10k ohms 

 

Weller Model SP23 

 

Hewlett-Packard Model 6215A 

 

3.2 CALIBRATION CHECK 

Successful completion of the following procedure assures proper transducer calibration. 

 

a.  Connect test equipment as shown in Figure 3-1. 

b.  Adjust the spindle micrometer on the TK3 test and calibration kit until it indicates 20 mils (0.51 

mm). 

c.  Insert the probe into the TK3 probe holder.  Adjust the probe in the holder until the digital 

multimeter indicates -2.00 ±0.01 Vdc and tighten the probe in the fixture.  Do not contact the 
probe tip. 

 

Содержание Bently Nevada 7200 Series

Страница 1: ...underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In stock Ready to ship TAR certified secure asset solutions Expert team I Trust guarantee I 100 satisfaction All trademarks brand names and brands appearing herein are the property of their respective o...

Страница 2: ...Part Number 74756 01 Rev G 07 07 Installation Manual 14 mm Proximity Transducer System 7200 Series ...

Страница 3: ...lowing 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 USA Telephone 1 775 782 3611 1 800 227 5514 Fax 1 775 215 2873 Internet www ge energy ...

Страница 4: ...at the end of its use are solely responsible for the proper disposal of the product No person firm corporation association or agency that is in control of product shall dispose of it in a manner that is in violation of any applicable federal state local or international law Bently Nevada LLC is not responsible for the disposal of the product at the end of its life or at the end of its use ...

Страница 5: ...MEASUREMENTS 2 2 INSTALLATION 4 2 1 INTRODUCTION 4 2 2 RECEIVING INSPECTION AND STORAGE 4 2 3 INSTALLATION CONSIDERATIONS 4 2 4 PROBE INSTALLATION 7 2 5 PROXIMITOR INSTALLATION 9 3 MAINTENANCE 12 3 1 INTRODUCTION 12 3 2 CALIBRATION CHECK 12 3 3 RECALIBRATION 14 3 4 TROUBLESHOOTING 14 4 APPENDIX A 16 5 APPENDIX B 20 6 APPENDIX C 29 ...

Страница 6: ... in installation The probe tip is approximately 14 mm 0 55 inches in diameter The system offers a linear measuring range of 160 mils 4 06 mm beginning at 20 mils 0 51 mm from the probe face Also the system scale factor is 100 mV mil 3 94 V mm Two Proximitor types are available each calibrated to a specific cable electrical length Probe cables are designed to achieve a system length of 5 0 or 9 0 m...

Страница 7: ... material such as a machine shaft approaches the probe tip eddy currents are induced into that material The closer the conductive material comes to the probe tip the greater the magnitude of the eddy currents As the eddy currents increase the power energy radiated from the probe tip is absorbed and there is a corresponding loss in power detected at the Proximitor If the probe to shaft gap remains ...

Страница 8: ... 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 Radial vibration probes should be mounted within 6 inches of the bearing under surveillance See Figure 1 3 Figure 1 3 Typical Radial Vibration Probe Mounting ...

Страница 9: ...ing installation When cable connectors are part of the equipment they must be properly protected from physical abuse or contamination by oil water or other substances by wrapping them with FEP tape or another connection protective device CAUTION Do not use adhesive electrical tape oil mist will dissolve the adhesive causing connector contamination 2 3 INSTALLATION CONSIDERATIONS Bently Nevada prob...

Страница 10: ...ove Electrical Runout Application Note 011 The electromagnetic fields of probe tips mounted too closely together will cross couple causing a small amplitude ac signal to be superimposed on the Proximitor outputs To prevent cross coupling mount the probes so that the distance between the tips is at least as large as that shown in the Figure 2 1 A 28 mm 1 1 inches minimum B 82 mm 3 2 inches minimum ...

Страница 11: ...e at least ten times machine running speed Brackets must support the probe in a position perpendicular to the observed surface The probe axis can vary 15 degrees from perpendicular without affecting the performance of the transducer system Probes may be mounted through existing machine hardware such as the bearing cover of a machine case Many times it is advantageous to use an external mounting ad...

Страница 12: ...ing hole ensure the tapped hole is free of foreign material If necessary use an appropriate tap to clean the threads Before the probe is threaded disconnect the probe integral cable from the Proximitor or make sure it is free to turn to prevent twisting the lead b The probe can be gapped mechanically Thread it into the mounting and use a nonmetallic feeler gauge to set the gap A nonmetallic feeler...

Страница 13: ...ot running so that the rotor can be placed at a known position with respect to the clearances in the thrust bearing After the probe is secured in position the probe cable must be securely fastened to prevent fatigue failure caused by oil flow moving air or singular stress conditions A clip or cable holding device will work as long as it does not exert enough force on the cable to cause the FEP ins...

Страница 14: ...ninsulated armor must be secured away from Proximitor terminals The excess cable for example can be secured with clamps to the enclosure lid or housing wall Bently Nevada Corporation recommends placing as many Proximitors as possible in the same protective enclosure provided that all can be installed without altering the electrical length of the probe to Proximitor cabling Enclosing multiple Proxi...

Страница 15: ... shield of each field wiring cable should be earth grounded at only one end the other end should not be grounded All shields of field wiring connected to the monitors in the same rack should connect to the same earth ground to avoid ground loops If safety barriers are not used in the field wiring each monitor end shield connects to the COM terminal of the respective rack signal module The signal m...

Страница 16: ...Section 2 INSTALLATION 11 Figure 2 4 Field Wiring and Shield Grounding for 7000 7200 and 9000 Series Monitors ...

Страница 17: ...IPMENT Digital Multimeter Test and Calibration Kit Variable Resistor Soldering Iron Power Supply Hewlett Packard Model 3465 A B Bently Nevada Corporation Model TK3 2E or TK3 2G 0 to 10k ohms Weller Model SP23 Hewlett Packard Model 6215A 3 2 CALIBRATION CHECK Successful completion of the following procedure assures proper transducer calibration a Connect test equipment as shown in Figure 3 1 b Adju...

Страница 18: ...ication first will eliminate any play in the micrometer before taking the 20 mil reading e Increase the gap in 20 mil increments by adjusting the micrometer Record the voltage indication at each increment f Either plot each voltage indication obtained in step e or compare each to the desired calibration curve in Appendix C g If the transducer is out of tolerance refer to the specifications recalib...

Страница 19: ...re its resistance Select a 1 tolerance resistor or two in parallel equal to the measured resistance of the variable resistor e Solder the resistor s between the calibration terminals CAUTION To prevent damage to components do not leave the soldering iron in contact with the Proximitor terminals too long f Remove the room temperature vulcanizing compound from the epoxy fiberglass shroud g Install t...

Страница 20: ...oltage between Proximitor OUTPUT and COM terminals If unchanged replace Proximitor If within a few volts of the voltage between Proximitor COM and VT terminals a short circuit exists in probe cable Clean probe cable connector with solvent such as Freon Reconnect probe lead to Proximitor Remeasure voltage between Proximitor OUTPUT and COM terminals If still zero volts replace the probe Voltage betw...

Страница 21: ...14 mm Proximity Transducer System 7200 Series Installation Manual 16 4 APPENDIX A DRAWINGS AND ORDERING INFORMATION ...

Страница 22: ...APPENDIX A 17 Figure A 1 14 mm Probe Ordering Information ...

Страница 23: ...14 mm Proximity Transducer System 7200 Series Installation Manual 18 Figure A 2 14mm Proximitor Ordering Information ...

Страница 24: ...APPENDIX B 19 Figure A 3 14mm Extension Cable Ordering Information ...

Страница 25: ...14 mm Proximity Transducer System 7200 Series Installation Manual 20 5 APPENDIX B SPECIFICATIONS FOR THE 14 MM PROXIMITY TRANSDUCER SYSTEM ...

Страница 26: ...cremental Scale Factor Derivative Over Calibrated Range in 20 mil 0 51 mm Increments Typical 90 Worst Case 99 7 Bench Calibration average scale factor adjusted for 100 mV mil 3 94 V mm 160 mils 4 06 mm beginning at 2 0 Vdc approximately 20 to 180 mils 0 51 to 4 57 mm 100 3 0 mV mil 3 94 0 12 V mm 100 7 0 mV mil 3 94 0 28 V mm Can be adjusted with the Proximitor calibration resistor for exactly 100...

Страница 27: ...ne which is centered to yield minimum error and which has a 100 mV mil 3 94 V mm slope Typical 90 Worst Case 99 7 E Gap at 4 0 Vdc F Temperature Sensitivity Probe and 1 foot 0 305 metres of cable Probe and 9 metres of cable Cable Only Less than 4 5 mils 0 11 mm Less than 6 5 mils 0 17 mm 40 12 mils 1 02 0 30 mm See Appendix C Figure C 2 See Appendix C Figure C 3 See Appendix C Figure C 4 ...

Страница 28: ...2 54 mm Near beginning of range 20 mils 0 51 mm C Supply Sensitivity D Supply Voltage Range E Current Draw F Output Resistance G Short Circuit Duration H Output Load I Frequency Phase Response 160 mils 4 06 mm beginning at 2 0 Vdc approximately 20 to 180 mils 0 51 to 4 57 mm Less than 2 0 mV mil 79 mV mm Less than 4 0 mV mil 157 mV mm 1 4 Vdc 0 9 Vdc See Appendix C Figure C 5 18 Vdc to 24 Vdc 13 m...

Страница 29: ...ak 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 If the probe or extension cable opens or shorts the output goes to within 2 volts of supply or within 1 volt of common When used with 7200 or 9000 monitors the Proximitor can be wired incorrectly in any manner with no resulting damage...

Страница 30: ...ion range Typical 90 Maximum 99 7 2 Voltage Change at Same Physical Gap Maximum At midrange gap 100 mils 2 54 mm Near beginning of range 20 mils 0 51 mm C DC Resistance Typical Probe Coil Lead Center Conductor Lead Shield D Insulation Resistance 160 mils 4 06 mm beginning at 2 0 Vdc approximately 20 to 180 mils 0 51 to 4 57 mm Less than 4 mV mil 157 mV mm Less than 8 mV mil 315 mV mm 2 2 Vdc 1 8 V...

Страница 31: ...ed Tip to Case Case Connector J Temperature Storage Operating K Relative Humidity from 35 to 212 F 2 to 100 C 0 025 mH FEP TFE Polyphenylene Sulfide PPS 300 Series Stainless Steel ETFE FEP Silver plated brass with TFE dielectric insert stainless steel nut 400 inch pounds 45 2 newton metres 560 inch pounds 63 3 newton metres 1 inch pound 0 11 newton metres 1 inch pound 0 11 newton metres 5 lbs 2 27...

Страница 32: ...uilt 1 Calibration Range 160 mils 4 06 mm beginning at 2 0 Vdc approximately 20 to 180 mils 0 51 mm to 4 57 mm 2 Interchangeability Error with 14 mm System a Average Scale Factor Change iTypical ii Worst case Less than 1 3 mV mil 51 mV mm Less than 2 4 mV mil 94 mV mm b Voltage Change at Same Gap Max i At midrange 120 mils 3 0 mm ii Near beginning of range 20 mils 0 51 mm 3 DC Resistance Nominal a...

Страница 33: ...System 7200 Series Installation Manual 28 B Mechanical Characteristics 1 Materials a Jacket and Core FEP TFE b Shrink tubing FEP 2 Tensile strength connector to connector 30 lbs 3 Recommended minimum bend radius 1 00 inch 25 4 mm ...

Страница 34: ...APPENDIX C 29 6 APPENDIX C SCALE FACTORS AND SENSITIVITY CURVES ...

Страница 35: ...14 mm Proximity Transducer System 7200 Series Installation Manual 30 Figure C 1 Incremental Scale Factor ...

Страница 36: ...APPENDIX C 31 Figure C 2 Probe and One Foot Cable at Temperature ...

Страница 37: ...14 mm Proximity Transducer System 7200 Series Installation Manual 32 Figure C 3 Probe and 9 Metres Cable at Temperature ...

Страница 38: ...APPENDIX C 33 Figure C 4 9 Metres Cable at Temperature ...

Страница 39: ...14 mm Proximity Transducer System 7200 Series Installation Manual 34 Figure C 5 Typical Proximitor Supply Sensitivity ...

Страница 40: ... 4 3 2 1 0 1 Amplitude dB 10 100 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 Frequency Response Figure C 6 Frequency Response ...

Страница 41: ...s Installation Manual 36 100 80 60 40 20 0 20 Phase Lag Degrees 10 100 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 Phase Response Figure C 7 Phase Response ...

Страница 42: ...APPENDIX C 37 Figure C 8 Effects of Flat Surface Side Clearance ...

Страница 43: ...14 mm Proximity Transducer System 7200 Series Installation Manual 38 Figure C 9 Effects of Counterbore ...

Страница 44: ...quipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentation Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate representative or authorized distributor for any manufacturer listed herein We re here to make your life easier How...

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