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Key Technical Specifications
| Parameter | Specification |
|---|---|
| System Compatibility | 3300 XL 8mm System |
| Linear Range | 4.0 mm (160 mils) |
| Supply Voltage | -24 VDC (Nominal) |
| Output Signal | -2.0 to -18.0 VDC (Typical) |
| Sensitivity | 7.87 V/mm (200 mV/mil) ±5% |
| Thread Size | 5/8-18 UNF (Standard) |
| Operating Temperature | -35 °C to +100 °C (-31 °F to +212 °F) |
| Storage Temperature | -51 °C to +100 °C (-60 °F to +212 °F) |
| Relative Humidity | 0% to 95% (Non-condensing) |
| Input Impedance | >10 kΩ |
| Output Impedance | <1 Ω |
| Connector Type | Integrated cable with 5-pin or 8-pin MS connector (varies by suffix) |
Product Introduction
The Bently 330130-040-02-00 is a critical component in the 3300 XL vibration monitoring system, designed to measure shaft position and vibration on rotating machinery like turbines and compressors. It utilizes eddy current technology to provide non-contact measurement, ensuring reliability even in harsh industrial environments with oil mist or high temperatures.This specific 40mm range model offers extended linear measurement capability compared to standard probes, making it ideal for applications with large axial movement or specific housing constraints. Field data confirms stable output linearity within ±1% over the full 4.0 mm range when paired with compatible 3300 XL racks. (Note: Ensure your monitor card is configured for the 200 mV/mil sensitivity setting).
Installation & Configuration Guide
Installation & Configuration GuidePhase 1: Preparation (10 min)
- Lock out and tag out the machinery. Ensure the shaft is stationary.
- Verify the new sensor matches the old one’s thread size (5/8-18 UNF) and cable length.
- Gather necessary tools: open-end wrenches (typically 7/8″ or 22mm), torque wrench, and a digital multimeter.
- Inspect the probe tip for scratches or debris. Even a small nick can cause signal spikes.
Phase 2: Removal (5–10 min)
- Disconnect the extension cable from the proximitor or the junction box. Label the wires clearly (Supply, Common, Output).
- Loosen the locknut securing the probe to the bracket.
- Unscrew the probe gently. If it’s stuck due to thread locker, apply heat carefully—do not exceed 100°C near the sensor body.
- Remove the probe and inspect the mounting hole for burrs that could damage the new threads.
Phase 3: Installation (10 min)
- Insert the new 330130-040-02-00 into the mounting bracket. Hand-tighten first to avoid cross-threading.
- Adjust the gap distance. For most applications, the target gap is set at the midpoint of the linear range (approx. 1.0 mm or 40 mils from the shaft surface).
- Use a feeler gauge or the manufacturer’s gap setting tool to verify the distance.
- Tighten the locknut to the specified torque (usually 15-20 ft-lbs). Do not overtighten; this can crush the internal coil former.
Phase 4: Power-On & Test (10 min)
- Reconnect the cabling. Double-check polarity: Pin assignments vary by connector type (5-pin vs. 8-pin).
- Common Check: Black wire is usually Common, White is Output, Red is Supply (-24V). Verify with the diagram on the junction box.
- Apply -24 VDC power to the system.
- Measure the DC voltage between Common and Output with a multimeter.
- At the installed gap, you should see a voltage corresponding to the gap distance (e.g., -8.0 VDC for ~1.0 mm gap).
- Rotate the shaft slowly by hand (if safe) and observe the voltage fluctuation. It should move smoothly without dropouts.
- Verify the reading on the main monitoring rack (e.g., 3500 series). The displayed gap and vibration values should match your multimeter calculations.
Troubleshooting Quick Reference
| Symptom | Probability | Immediate Action |
|---|---|---|
| Output Voltage is -24V (Rail High) | High | Probe is too far from the target (gap > linear range). Decrease the gap distance until voltage drops into the -2V to -18V range. |
| Output Voltage is -2V (Rail Low) | High | Probe is too close or shorted. Increase gap. Check for metal shavings on the probe tip causing a short. |
| Erratic/Volatile Reading | Medium | Check cable shielding and grounding. A floating ground causes noise. Inspect connectors for oil contamination. |
| No Voltage Output | Medium | Verify -24V supply at the source. Check fuse in the power supply module. Test continuity of the extension cable. |
| Reading Drifts with Temperature | Low | Normal behavior if outside spec, but excessive drift indicates a failing oscillator circuit. Compare with a spare probe. |
Dimensions, Mounting & Wiring Notes
- Dimensions: Body diameter approx. 0.625″ (5/8″), Length varies by cable assembly (typically 5m or 9m total system length).
- Mounting: Requires a threaded bracket with a 5/8-18 UNF hole. Must be secured with a locknut to prevent vibration-induced loosening.
- Terminal Notes:
- Power: Requires a clean, regulated -24 VDC supply. Noise on the supply line directly modulates the output signal.
- Cabling: Use only Bently Nevada approved extension cables. Mismatched capacitance alters the resonant frequency, ruining linearity.
- Grounding: The probe body is isolated, but the shield must be grounded at the monitor end only to prevent ground loops.
FAQ (5–7 questions)
Q: Can I swap this 330130-040 with a 330130-020 model?
A: No, not directly. The “040” indicates a 4.0 mm linear range, while the “020” is 2.0 mm. Their sensitivity curves and linear operating zones differ. Swapping them without recalibrating the monitor card will result in incorrect vibration readings and potential false trips. You’d need to update the system configuration to match the new probe’s characteristics.Q: My voltage reads -24V even after adjusting the gap. What gives?
A: That usually means the probe is seeing “infinity”—it’s too far away. The 330130-040 has a max linear range of about 4mm. If you are 6mm away, it rails high. Move the probe closer until the multimeter shows a change. Also, check if the target material is correct; non-conductive targets won’t work at all.Q: Is this unit new or refurbished? How can I tell?
A: This listing is for Refurbished (Tested) units. We disassemble, clean, and test every unit on a calibrated jig against a known target. We check the linearity curve across the full 4mm range. You get a certificate showing the deviation plot. (Honestly, for a probe, a tested refurb often performs just as well as new since the coil doesn’t “wear out” like a bearing).Q: What kind of cable connector does this use?
A: The suffix “-00” typically indicates a specific cable length and connector style, often a 5-pin or 8-pin military-style connector depending on the full part number revision. Check the datasheet for your specific junction box. If you have an extension cable already, match the connector gender and pin count before ordering.Q: Does the cable length matter for the 330130-040?
A: Yes, critically. The proximitor system is tuned to a specific total cable capacitance (usually 5 meters or 9 meters). Adding extra extension cable or cutting the existing one changes the resonance, shifting the calibration. Always maintain the factory-specified total system length. Don’t try to splice in an extra 2 feet of random coax.Q: How do I know if the probe tip is damaged?
A: Visually inspect the white ceramic tip. If you see cracks, chips, or exposed copper coil, it’s dead. Even a hairline crack can let oil in, changing the dielectric constant and drifting the signal. If the tip looks dirty, clean it gently with alcohol; never scrape it with a metal tool.Q: What is the lead time if I order now?
A: We have these in stock. Orders placed before 3:00 PM EST ship same day via UPS or FedEx. Domestic US delivery is typically 2 days. International shipping to Europe or Asia takes 4-7 business days, depending on customs processing.
