Description

The Bently Nevada 330100-90-00, also cataloged as the 330100 Proximitor Sensor, operates as a dedicated hardware component for generating radio frequency (rf) excitation and conditioning proximity signals within a 3500 or 3300 Machinery Protection System. The device provides direct electrical execution, transforming high-frequency eddy-current fluctuations into a continuous linear voltage proportional to the static gap distance and dynamic vibration amplitudes of a rotating machine shaft.

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics

The precision circuitry within the solid-state housing enables predictable eddy-current probe scaling when mapped to AISI 4140 steel targets. The internal oscillator feeds an rf signal into the probe coil, generating a magnetic field that evaluates the target position to execute gap voltage validation relative to the optimal -10 VDC operational midpoint. To guarantee stable telemetry across dense machinery pathways, the integrated housing design incorporates structural cross-talk suppression. This electronic dampening shields the sensitive measuring loop from adjacent high-voltage transient fields, preserving raw phase and displacement data across the entire rotor dynamics spectrum.

Frequently Asked Questions

Q: Does this 9.0-metre sensor option function properly with a 5.0-metre physical extension cable?

A: No, matching a 9.0-metre sensor option with a 5.0-metre extension cable creates a severe impedance mismatch. The sensor circuitry is explicitly tuned for a total physical loop length (probe plus extension cable) of exactly 9.0 metres to achieve its rated 7.87 V/mm scale factor.

Q: What physical manifestation marks an incorrect supply voltage loop connection?

A: Connecting a positive voltage or a supply outside the -17.5 VDC to -26.0 VDC boundary forces the internal clamp circuits into a fault state. This completely suppresses the output signal, preventing any valid vibration or gap voltage data transmission to the monitoring rack.

Field Installation Guidelines

• Coaxial Connector Coupling: Secure the miniature coaxial connection firmly using the standard click-loc mechanics. Ensure that the integrated insulating sleeve completely covers the metallic junction to isolate the circuit from ground loops.
• DIN-Rail Panel Isolation: Mount the sensor casing securely onto the interior panel or dedicated DIN-rail bracket. Ensure that the underlying mounting substrate connects cleanly to instrument ground while keeping the individual sensor housing isolated from stray field paths.
• Terminal Wire Gauge Limits: Connect the signal, common, and power wiring using high-density twisted shielded cable with conductors between 0.2 mm squared and 1.5 mm squared (24 to 16 AWG). Ensure that the outer shield wires terminate strictly at the main control rack terminal block.