{"product_id":"bently-nevada-24765-02-01-dc-lvdt-assembly-case-expansion-systems","title":"Bently Nevada 24765-02-01 DC LVDT Assembly Case Expansion Systems","description":"\u003cp\u003eConfigured for absolute structural thermal growth measurement in large steam turbine housings, the \u003cstrong\u003eBently Nevada 24765-02-01\u003c\/strong\u003e (\u003cstrong\u003e24765\u003c\/strong\u003e DC LVDT Assembly) provides direct physical\/electrical execution. This linear variable differential transformer utilizes internal conditioning circuitry to convert mechanical armature travel into a highly linear DC voltage output, allowing the continuous tracking of machine casing expansion relative to the foundation floor block during thermal transients.\u003c\/p\u003e\n\u003ch3\u003eSelection Matrix Breakdown\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e24765\u003c\/strong\u003e : Base Model Identifier for the DC Linear Variable Differential Transformer Assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e-02\u003c\/strong\u003e : Linear Range Option: 50.8 mm (2.00 inches) mechanical stroke length\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e-01\u003c\/strong\u003e : Spring Option: Internal spring return mechanism included for continuous surface contact\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCore Hardware Parameters\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e24765-02-01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBently Nevada\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.95 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e32.5 x 22 x 3.7 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-30 deg C to +100 deg C (Standard industrial envelope)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.5 W maximum external current loop draw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical Scale Factor\u003c\/td\u003e\n\u003ctd\u003e0.404 V\/mm (10.25 V\/in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical Linear Range\u003c\/td\u003e\n\u003ctd\u003e50.8 mm (2.00 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003e-3 dB frequency attenuation point at 15 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Mechanism\u003c\/td\u003e\n\u003ctd\u003eHeavy-duty spring return tracking assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTariff Code\u003c\/td\u003e\n\u003ctd\u003e8537101190\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eRotor Dynamics and Cross-Talk Suppression\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e24765-02-01\u003c\/strong\u003e works alongside proximity probe systems to maintain independent verification profiles of overall structural machine expansion. While eddy-current probe scaling is dedicated to high-frequency fluid-film bearing vibrations and -10 VDC gap voltage targets, this DC LVDT addresses slow-moving, low-frequency structural displacements. Internal core insulation layouts prevent high-frequency electrical fields and electromagnetic cross-talk from corrupting the low-voltage DC linear tracking output, ensuring clean displacement values are transmitted back to the primary Turbine Supervisory Instrumentation (TSI) processing card.\u003c\/p\u003e\n\u003ch3\u003eSupply Manifest\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Bently Nevada 24765-02-01 DC LVDT Assembly\u003c\/li\u003e\n\u003cli\u003e1 x Factory Calibration Data Card\u003c\/li\u003e\n\u003cli\u003e2 x Hexagonal Jam Mounting Nuts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical and Field Setup Protocols\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface Interface Check\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eThe machine casing contact block must be machined parallel to the LVDT core travel axis to prevent sideload friction on the internal bearing guides.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArmature Centering Alignment\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003ePre-load the internal spring return assembly to the mid-point of its physical 50.8 mm stroke length during ambient machine turnaround to allow symmetric tracking.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConduit Routing Restraints\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eIsolate the LVDT direct current signal wiring within dedicated flexible steel conduits to prevent electromagnetic induction from nearby AC power lines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShield Ground Isolation\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eTerminate the cable outer foil shield strictly at the TSI monitor panel chassis common grounding strip while leaving it ungrounded at the LVDT head.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Validation FAQs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCan this LVDT assembly be serviced or replaced while the machine is running?\u003c\/p\u003e\n\u003cp\u003eYes, because this device tracks external casing growth rather than internal rotor dynamics, the physical mounting can be handled externally without breaching the machine lubrication boundary.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat happens if the LVDT core experiences mechanical displacement beyond the 50.8 mm range?\u003c\/p\u003e\n\u003cp\u003eDisplacements past the 50.8 mm threshold cause severe output scale factor non-linearity, and the signal voltage will saturate near its positive or negative rail limits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes this specific hardware variant require an external AC carrier amplifier module?\u003c\/p\u003e\n\u003cp\u003eNo, the 24765 series contains internal electronic oscillators and demodulator circuits that accept standard DC input power and generate a pre-conditioned DC voltage output.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow does a 15 Hz frequency response affect the system's ability to track machinery faults?\u003c\/p\u003e\n\u003cp\u003eThe 15 Hz cutoff is optimized for slow thermal expansion tracking while suppressing high-frequency structural building noise and casing vibrations from affecting the measurement.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the consequence of applying uneven force to the internal spring return shaft?\u003c\/p\u003e\n\u003cp\u003eExcessive sideload or bending forces cause binding within the precision internal guide bearings, leading to permanent calibration drift or premature mechanical stick-slip errors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs it necessary to perform field calibration checks on the 0.404 V\/mm scale factor?\u003c\/p\u003e\n\u003cp\u003eThe scaling factor is set at the factory, but field verification using a micro-meter calibration jig is required before final mechanical lock-in to confirm loop integrity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat failure state is indicated if the LVDT output drops to exactly 0 VDC?\u003c\/p\u003e\n\u003cp\u003eA constant 0 VDC output typically indicates an open circuit loop fault, a loss of primary DC excitation power, or a total grounding short circuit in the interconnecting cable.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow should the physical probe tip be protected against outdoor atmospheric corrosion?\u003c\/p\u003e\n\u003cp\u003eThe assembly features a rugged protective housing, but outdoor field deployment requires an external weather-proof protective boot or metal shield enclosure to prevent grit binding.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bently Nevada","offers":[{"title":"Default Title","offer_id":46026691969197,"sku":"24765-02-01","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/xian-57_f5c03867-053b-44f5-91b6-3492f8352666.jpg?v=1784117242","url":"https:\/\/www.maxwellplc.com\/ga\/products\/bently-nevada-24765-02-01-dc-lvdt-assembly-case-expansion-systems","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}