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Summary of Contents for Bently Nevada 19045
- Page 1 Installation Manual Bently Nevada™ Asset Condition Monitoring DC-LVDT/Housing Assembly Model 19045, 19046, 19047 Part Number TW8029303 Rev. D (08/07)
- Page 2 All rights reserved. The information contained in this document is subject to change without notice. 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...
- Page 3 Bently Nevada LLC is not responsible for the disposal of the product at the end of its life or at the end of its...
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Page 4: Table Of Contents
DC-LVDT/Housing Assembly Model 19045, 19046, 19047 Installation Manual Contents 1. DESCRIPTION ....................1 2. INSTALLATION ....................5 3. MAINTENANCE ....................11 4. RECOMMENDED SPARE PARTS ..............12 5. APPENDIX - SPECIFICATIONS ..............13... -
Page 5: Description
Section 1 - DESCRIPTION 1. DESCRIPTION GENERAL The DC-LVDT (LVDT) transducer used with Bently Nevada Corporation (BNC) instruments provides a linear dc output voltage over a specific range of core movement. This output, connected to the BNC Case Expansion Indicator, is used to measure the expansion of a machine case as operating conditions vary. - Page 6 DC-LVDT/Housing Assembly Model 19045, 19046, 19047 Installation Manual LVDT HOUSING ASSEMBLY OPTIONS Table 1-1. LVDT Housing Options CATALOG NO ASSEMBLY 19045 - AXX DC-LVDT Housing Assembly with Model 500 HR-DC LVDT DC-LVDT Housing Assembly with Model 1000 HR-DC LVDT 19046 – AXX...
- Page 7 Section 1 - DESCRIPTION FUNCTIONAL DESCRIPTION A functional block diagram of the LVDT internal circuitry is shown in Figure 1-1. The 24 Vdc supply power is connected to LVDT lead wires. This voltage drives an oscillator to produce an alternating current. The alternating current is applied to the primary of the differential transformer.
- Page 8 DC-LVDT/Housing Assembly Model 19045, 19046, 19047 Installation Manual Figure 1-2. DC-LVDT Output versus Core Position...
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Page 9: Installation
Section 2 - INSTALLATION 2. INSTALLATION RECEIVING INSPECTION Visually inspect exterior and interior to determine if any shipping damage has occurred. (Figures A-2, A-3, and A-4 illustrate the fasteners that retain the housing cover.) If shipping damage is apparent, file a claim with the carrier and submit a copy to BNC. - Page 10 DC-LVDT/Housing Assembly Model 19045, 19046, 19047 Installation Manual MECHANICAL LINKAGE The maehine-LVDT linkage design is determined by the user. A typical case expansion measurement linkage is illustrated in Figure 2-1. In general, linkage design should conform to the following guidelines.
- Page 11 Section 2 - INSTALLATION LVDT MOUNTING Generally, configurations for the LVDT installations will vary; however, for all installations, brackets or other structural members used to mount the LVDT assembly must be rigid. If the bracket is flexible, undesireable relative motion between the LVDT and observed machine part may result.
- Page 12 DC-LVDT/Housing Assembly Model 19045, 19046, 19047 Installation Manual POWER AND SIGNAL CONNECTIONS Connections between the LVDT and the instrument signal module are shown on the interconnect diagram contained in the instrument manual. Cabling is generally fabricated at the user s facility, unless a specific request is made to have BNC supply it.
- Page 13 Section 2 - INSTALLATION ADJUSTMENT Adjustment requires measuring the LVDT output with the linkage set at the zero- expansion point. Perform all adjustments as accurately as possible. The user may construct a gaging tool, if desired, to aid in accurately adjusting the LVDT core position during calibration.
- Page 14 DC-LVDT/Housing Assembly Model 19045, 19046, 19047 Installation Manual Table 2-1. Recommended Installation Equipment RECOMMENDED EQUIPMENT EQUIPMENT SPECIFICATIONS Hewlett-Packard HP970A 3-1/2 digit display with: Digital Multimeter (DMM) 0 to ±1000 Vdc 0 to 1000 Vac 0 to 1000 mA dc 0 to 1000 mA ac...
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Page 15: Maintenance
Section 3 - MAINTENANCE 3. MAINTENANCE GENERAL It is recommended that the user schedule inspections according to the environment in which the transducer operates and the likelihood of wear or damage. TROUBLESHOOTING The following troubleshooting procedure verifies proper LVDT performance. This procedure should be followed in the order given. -
Page 16: Recommended Spare Parts
DC-LVDT/Housing Assembly Model 19045, 19046, 19047 Installation Manual 4. RECOMMENDED SPARE PARTS Bently Nevada Corporation recommends that at least one of each type LVDT transducer used in the instrument system be kept on hand as a spare. The recommended spare parts for field maintenance are listed below. If the instrument system is located in a remote area or is used on an extremely critical application, several spares may be desired. -
Page 17: Appendix - Specifications
Section 5 - APPENDIX - SPECIFICATIONS 5. APPENDIX - SPECIFICATIONS DC-LVDT TRANSDUCER Input Power (nominal) -24 Vdc, 25 mA Environmental Limits Operation -18°C to +71°C Storage -54°C to +93°C Shock 250 g for 11 ms Vibration 10 g @ 0 to 2 kHz Construction Body Series 400 magnetic stainless steel... - Page 18 DC-LVDT/Housing Assembly Model 19045, 19046, 19047 Installation Manual MODEL 500 HR-DC 1000 HR-DC 2000 HR-DC Output Scale Factor (nominal) V/in (V/mm) 8.8 (0.35) 10.2 (0.40) 3.6 (0.14) Linear Range ± 0.5 ± 1.0 ± 2.0 inches (mm) (±12.5) (±25.4) (±51)
- Page 19 Section 5 - APPENDIX - SPECIFICATIONS Figure A-l. DC-LVDT Dimension Identification...
- Page 20 DC-LVDT/Housing Assembly Model 19045, 19046, 19047 Installation Manual...
- Page 21 Section 5 - APPENDIX - SPECIFICATIONS...
- Page 22 DC-LVDT/Housing Assembly Model 19045, 19046, 19047 Installation Manual...
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