Technical Specifications Applicable Probe: Bently 3307 series large range proximity probe Power Supply: -24V DC Output Signal: Linear gap voltage signal Operating Temperature: -40℃ ~ +70℃ Mounting: Bracket mounting Housing: Cast aluminum alloy shielding housing
Functional Features Special high-frequency excitation circuit designed for large diameter eddy current probe. Convert large range probe impedance variation into linear analog voltage signal. Built-in self-diagnosis function to detect probe cable open and short circuit fault. Aluminum alloy shielding housing to suppress industrial electromagnetic interference. Screw terminals for convenient field wiring and maintenance. Stable performance for long-term continuous operation in control cabinet.
Application Scenarios Preamplifier unit for 3307 series wide range eddy current probe measuring circuit. Large gap shaft vibration and thrust displacement monitoring of heavy compressors. Power plant super large rotating machinery online protection system. Heavy industry critical equipment condition monitoring. Non-contact large clearance gap measurement of heavy rotating rotors.
Structural Characteristics Cast aluminum alloy sealed housing with mounting ears. Internal PCB integrated special oscillator, signal conditioning and diagnostic circuit. Screw terminals for power supply, probe signal and output signal. Cable entry holes for signal and power cables. Shielded structure to reduce external interference.
Working Principle The special oscillator circuit generates matched high-frequency alternating signal to drive large range probe coil. Eddy current effect changes coil impedance with large rotor gap variation. The conditioning circuit converts impedance variation into linear voltage signal proportional to gap. The diagnostic circuit continuously monitors the probe loop status and reports cable faults.
Installation Requirements Mount the proximitor on rigid flat bracket. Connect probe extension cable to signal terminals following wiring schematic. Supply -24V DC power to power terminals correctly without polarity reversal. Connect housing protective ground reliably. Separate signal wiring from high voltage power cables. Check output voltage and loop status after power on.
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