Bently Nevada 330876-03-90-00-05 3300 XL 50mm Eddy-Current Proximity Probe

Description

Bently Nevada 330876-03-90-00-05 3300 XL 50mm Eddy-Current Proximity Probe

Product Core Introduction

The 330876-03-90-00-05 is a 3300 XL series 50mm eddy-current proximity probe from Bently Nevada. It is a non-contact displacement transducer, paired with a proximitor to measure shaft vibration, radial displacement, axial position and differential expansion on rotating machinery. This configuration is side-exit smooth 1.99” probe housing, 9-meter integrated FluidLoc high-temperature triaxial cable, non-armored cable, ATEX/IECEx/CSA global safety approvals. Dual PPS sealing design prevents moisture ingress, suitable for high-temperature turbine differential expansion (DE) measurement. Widely used in power generation, oil & gas, heavy industry rotating equipment protection and condition monitoring. Original new units are available, refurbished spare stock is also offered for maintenance.

330876-03-90-00-05

Main Technical Specifications

Brand Same‑Series Model Recommendation

• 330876-03-05-00-05: Same side-exit probe, 5m FluidLoc cable version, shorter cable for compact installation.
• 330876-03-90-01-05: 9m cable with stainless steel armor, for mechanical abrasion environments.
• 330878: 8mm small range 3300XL probe, for standard shaft vibration monitoring.
• 330104: Classic 3300 series 8mm probe, legacy standard vibration probe.

Professional Quality Control Test Standard Operating Procedures (SOP)

5.1 Incoming & Visual Inspection

Inspect stainless steel probe housing, PPS tip, cable insulation, ClickLoc connector and sealing structure. Visual check for tip cracks, cable cuts, connector pin damage and seal defects. Insulation resistance test for triaxial cable. Retain batch traceability and calibration certificate.

5.2 Static Calibration Test

Mount probe on calibration fixture with target steel disc. Verify linearity, scale factor and offset across full measurement range. Reject units out of tolerance for linearity or sensitivity.

5.3 Burn-in Test

48-hour temperature cycling burn-in. Monitor cable insulation and signal stability under thermal cycling. Check seal integrity after thermal test.

5.4 Environmental Stress Screening

Temperature cycling (-35℃ ↔ +200℃), humidity soak and low-level vibration per IEC 60068. Inspect cable and probe sealing after stress, recheck calibration.

5.5 Final Acceptance Test

Full system test with matching 3300XL proximitor. Verify output signal, linear response. Complete dimensional, label and accessory inspection. Pack with cable protection cap.

330876-03-90-00-05

New Probe Installation Guidelines

6.1 Pre-Installation Preparation

1. Shutdown rotating equipment and implement LOTO procedure. Confirm machinery is stationary.
2. Wear lint-free gloves; avoid scratching PPS probe tip.
3. Inspect probe tip, cable and ClickLoc connector for damage. Confirm matching proximitor and monitor rack.
4. Prepare mounting bracket, torque wrench; ensure target shaft surface is clean.

6.2 Mechanical Installation

1. Install probe into mounting bracket, adjust probe gap to target working offset. Torque probe mounting thread to specified torque value.
2. Route the 9m FluidLoc cable; maintain minimum bend radius ≥25.4mm, avoid sharp edges and pull tension.
3. Connect ClickLoc connector to proximitor; install protective cap for unused connector.
4. Keep cable away from high-power motor cables to reduce electrical noise interference.

6.3 Post-Installation Commissioning

1. Double-check probe gap and connector locking before power-up of monitoring rack.
2. Power on proximitor and monitor rack, read gap voltage to confirm correct working offset.
3. Run static gap test, verify linearity response.
4. Start machine, monitor vibration and position signal in real time. Run continuous 30–60 min trending test before putting into online protection.

Important Safety Note: This probe is used for rotating machinery protection. Improper gap setting or cable damage can lead to false alarm or loss of machine protection. Only certified vibration & condition monitoring technicians are allowed to perform installation and calibration.

330876-03-90-00-05

Application Scenarios & Product Characteristics

7.1 Application Scenarios

• Steam / gas turbine differential expansion (DE) measurement
• Generator, compressor, pump shaft radial vibration and axial position monitoring
• Heavy rotating machinery condition monitoring and machine protection
• Oil & gas, power plant critical equipment online monitoring

7.2 Key Characteristics

• 50mm large linear range, designed for turbine differential expansion
• High-temperature rating up to 200°C continuous operation
• Dual front & rear PPS sealing structure, moisture resistant
• 75Ω triaxial FluidLoc PFA cable, stable signal under high temperature
• ClickLoc quick lock connector, easy installation and maintenance
• Compatible with Bently 3300 / 3500 monitoring system
• Certified for hazardous area (ATEX / IECEx / CSA)

FAQ (Frequently Asked Questions)

Q1: Signal lost after installation, no gap voltage reading. A1: Check ClickLoc connector fully locked. Inspect cable breakage or probe tip damage. Verify proximitor power supply.

Q2: Gap voltage drifts when temperature rises. A2: Check cable routing for heat sources. Confirm probe tip is not touching rotating shaft. Recheck probe sealing and calibration.

Q3: Can I replace 330876-03-90-00-05 with 330876-03-05-00-05 directly? A3: Probe head is identical, but total cable length changes. Proximitor must be re-calibrated for total system length.

Q4: Is this probe suitable for hazardous zone? A4: Yes, model suffix -05 includes ATEX/IECEx/CSA hazardous area approvals. Follow local installation standards for explosive environment.

Q5: Can I cut or splice the FluidLoc integral cable? A5: Not allowed. Splicing will destroy calibration and high-temperature sealing performance.