Bently Nevada 24583-03 Proximitor Product Specification
24583-03 is a factory pre-calibrated single-range 50 mm eddy-current proximitor belonging to Bently Nevada classic 7200 series transducer product line, developed exclusively for 50 mm oversized proximity probe measurement configuration. It serves as core signal conditioning component for non-contact clearance measurement system, cooperating with matched 330190 series 50 mm proximity probes and factory-calibrated extension cables to convert tiny clearance variation between probe tip and metallic rotating target into proportional linear DC voltage output signal. The processed analog signal is transmitted to 7200 rack monitor modules or 3500 series monitor cards for continuous measurement of turbine casing differential expansion, rotor axial thrust displacement and large valve stem travel parameters, widely installed in thermal power steam turbine, heavy-duty gas turbine and large petrochemical centrifugal compressor protection loops to realize over-limit alarming and unit emergency trip interlock function. Every finished proximitor undergoes strict linearity verification, high-low temperature cycling aging and insulation inspection before factory delivery to guarantee stable measuring accuracy under high-temperature, oil mist and heavy electromagnetic interference environment near equipment bearing housing and hot cylinder casing.
Description
Bently Nevada 24583-03 Proximitor Product Specification
1. Product Overview
24583-03 is a factory pre-calibrated single-range 50 mm eddy-current proximitor belonging to Bently Nevada classic 7200 series transducer product line, developed exclusively for 50 mm oversized proximity probe measurement configuration. It serves as core signal conditioning component for non-contact clearance measurement system, cooperating with matched 330190 series 50 mm proximity probes and factory-calibrated extension cables to convert tiny clearance variation between probe tip and metallic rotating target into proportional linear DC voltage output signal. The processed analog signal is transmitted to 7200 rack monitor modules or 3500 series monitor cards for continuous measurement of turbine casing differential expansion, rotor axial thrust displacement and large valve stem travel parameters, widely installed in thermal power steam turbine, heavy-duty gas turbine and large petrochemical centrifugal compressor protection loops to realize over-limit alarming and unit emergency trip interlock function. Every finished proximitor undergoes strict linearity verification, high-low temperature cycling aging and insulation inspection before factory delivery to guarantee stable measuring accuracy under high-temperature, oil mist and heavy electromagnetic interference environment near equipment bearing housing and hot cylinder casing.
2. Part Number Coding Definition
The base model code 24583 represents fixed 50 mm full-scale dedicated proximitor platform of 7200 product family, exclusively preset for single-specification 50 mm diameter proximity transducer setup without compatibility for other size probes such as 25 mm type. The suffix digit 03 defines unit mechanical structure, internal circuit configuration and factory calibration edition; this version features panel screw fixed metal housing structure, standard non-explosion-proof internal circuit layout and locked original calibration parameters for 50 mm full span measurement. Any alternative suffix variant like 24583-02 or 24583-04 carries different factory-calibrated scale factor and cannot be directly replaced on-site without professional full-loop recalibration, which will directly cause measuring deviation and false protection action of whole monitoring circuit.
3. Core Functional Features
Designed with high-temperature resistant high-frequency oscillation circuit, this proximitor generates stable high-frequency excitation signal to drive matched 50 mm eddy-current probe, realizing accurate linear conversion from gap fluctuation to DC analog voltage within defined effective measuring span. Built-in multi-stage passive filter network effectively suppresses power frequency noise and high-frequency clutter interference induced by adjacent high-power frequency converter and AC power cables, ensuring signal integrity during long-distance calibrated cable transmission. The fully sealed cast aluminum metal casing provides outstanding dust-proof, oil-proof and anti-vibration performance, adapting compact installation space inside field junction boxes close to high-temperature turbine components. Built-in open/short circuit fault diagnosis function can reflect abnormal wiring status via obvious output voltage drift value, greatly simplifying on-site routine troubleshooting and periodic maintenance work. The whole transducer system can maintain fixed calibration coefficient only when assembled with original certified probes and matched calibrated extension cables, non-standard custom cable replacement will invalidate factory preset calibration data permanently.
4. Electrical and Calibration Specifications
Rated operating power supply ranges from -17.5 VDC to -26 VDC negative DC power, standard field input is -24 VDC supplied by rack monitoring module power source or dedicated regulated DC power unit. Factory locked fixed sensitivity is 0.394 V/mm (10 mV/mil) specially for matched 50 mm proximity probe, overall linearity tolerance is controlled within ±5% complying with API 670 industrial machinery monitoring standard. Valid linear measuring range is 5 mm to 55 mm with total full span of 50 mm for clearance measurement. Output signal includes DC component for static position reading of axial displacement and differential expansion, and AC component for dynamic shaft vibration collection; effective frequency response covers DC up to 8 kHz to satisfy slow thermal expansion long-period measurement and high-frequency dynamic vibration acquisition requirements. Standard screw-type terminal block is reserved for power input wiring, probe cable access and analog signal output connection respectively, terminals shall be fully tightened during field wiring to avoid intermittent signal fluctuation from poor contact.
5. Environmental Specification
Continuous allowable working ambient temperature spans from -40℃ to +121℃ to fit high-temperature installation near heated turbine casing and bearing pedestal; spare storage ambient temperature is between -55℃ and +85℃ under dry non-condensation environment. Applicable working relative humidity ranges 5%RH ~95%RH without internal enclosure dew condensation to prevent internal circuit corrosion and short-circuit failure. The proximitor can withstand continuous running vibration from 10 Hz to 2 kHz generated by surrounding rotating industrial equipment; long-term immersion in corrosive hot steam and strong acid gas environment is prohibited to extend electronic component service life. For installation altitude over 1000 meters, shorten regular inspection cycle appropriately to monitor working condition periodically.
6. Installation & Maintenance Instruction
Pre-set mounting holes on metal housing allow rigid bolt fastening onto junction box base or customized installation bracket. During field construction, separate signal cables away from high-current AC power wiring to reduce cross electromagnetic coupling interference. In regular equipment maintenance, inspect casing integrity, terminal fastening tightness and peripheral oil accumulation status around installation position periodically. When field unit failure requires spare replacement, only full identical part number 24583-03 can be directly swapped; all replacement spare units complete full performance test and temperature aging screening before factory shipment to guarantee complete interchangeability during system overhaul and maintenance.
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