Bently 33103-00-04-10-02-00 3300‑XL 8 mm Proximity Probe

Description

Hardware & Electrical Specifications

‑ Manufacturer: Bently Nevada (Baker Hughes) ‑ Device Type: 3300‑XL 8 mm Eddy‑current Proximity Probe ‑ Probe Tip Diameter: 8 mm ‑ Linear Measurement Range: 2 mm (80 mil) ‑ Nominal Sensitivity: 7.87 V/mm (200 mV/mil), tolerance ±5 % ‑ Thread Specification: M10 × 1 ‑ Case Length: 40 mm ‑ Integrated Probe Cable Length: 1 m ‑ Connector Type: ClickLoc miniature coaxial connector ‑ Probe Tip Material: Polyphenylene sulfide (PPS) ‑ Housing Material: AISI 303 / 304 stainless steel ‑ O‑Ring: Viton sealing ‑ DC Resistance: 7.59 Ω ±0.5 Ω ‑ Frequency Response: DC‑10 kHz (‑3 dB) ‑ Operating Temperature: ‑51 ℃ ~ +177 ℃ ‑ Storage Temperature: ‑55 ℃ ~ +185 ℃ ‑ Minimum Cable Bend Radius: 25.4 mm (1 inch) ‑ Construction: Non‑armored cable ‑ Certifications: CE, CSA, ATEX hazardous‑area approvals

Environmental Specifications

‑ Relative Humidity: 5%‑95 %, non‑condensing ‑ Vibration Resistance: Complies with API‑670 field installation vibration requirements ‑ Chemical Resistance: Resists oil mist, turbine lubricant and common industrial contaminants

Core Functions

1. Non‑contact gap sensing: Generates high‑frequency eddy‑current field to detect physical clearance between probe tip and metallic shaft target, converts mechanical gap variation into RF signal sent to proximitor.
2. Radial‑vibration measurement: Captures dynamic shaft radial vibration for turbine, compressor and generator condition monitoring.
3. Axial‑thrust‑position measurement: Monitors static thrust‑shaft displacement to detect thrust‑bearing wear.
4. System interchangeability: 3300‑XL components support module‑to‑module interchangeability without individual bench calibration when total system electrical length is maintained.
5. Harsh‑environment adaptability: High‑temperature probe tip and corrosion‑resistant stainless‑steel housing suit long‑term operation inside turbine casings and cabinet environments.

Installation, Replacement & Critical Warnings

1. This sensing probe cannot be hot‑swapped. Isolate the measurement channel before probe removal or mounting work.
2. Compatibility warning: ‑ The total electrical length (probe plus extension cable) shall strictly match the paired 3300‑XL proximitor specification. Do not use extension cables of arbitrary length. ‑ Target surface material must be standard ferrous or non‑ferrous steel; hard coating, plating or small target dimensions will reduce effective linear range. ‑ Mount via M10×1 thread and lock‑nut; control mounting torque to avoid thread damage or probe‑tip deformation. ‑ Recommended operating gap setting: approx 1.27 mm (50 mil), corresponding to proximitor output of about ‑9 Vdc. ‑ Signal cables shall be routed separately from high‑voltage power and variable‑frequency‑drive cables to minimize electromagnetic crosstalk. ‑ Avoid sharp bending, pulling or squeezing the probe cable; excess cable shall be loosely coiled observing minimum bend‑radius limits. ‑ Connector contacts shall be kept clean; inspect for dirt, oil and corrosion before mating.

Commissioning and Verification Criteria

1. Confirm mechanical mounting: probe is securely locked, tip has safe clearance to rotating target, no mechanical collision risk.
2. Perform static gap calibration: adjust probe installation gap within valid linear range, verify proximitor output voltage changes linearly with gap movement.
3. Check raw signal waveform through proximitor BNC test port; waveform shall be stable without excessive noise.
4. Under machine stand‑still and running conditions, confirm vibration and position readings are stable, without random jumping or drifting.
5. Simulate probe‑loop open‑circuit / short‑circuit condition to verify system loop‑fault alarm activates correctly.

Common Failure Modes and Symptoms

‑ Probe‑tip damage or contamination: Disturbed eddy‑current field, measurement offset, poor linearity. ‑ Internal cable open / intermittent breakage: Intermittent reading fluctuation, sporadic loop‑fault alarm, signal dropout. ‑ Connector pin corrosion or contamination: Unstable signal transmission, irregular data jitter. ‑ Improper installation gap: Operating point falls outside linear range, vibration measurement loses accuracy. ‑ Incompatible target material or insufficient target area: Sensitivity deviation, measurement error, no hardware fault alarm triggered.