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Key Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 330180-90-00 |
| Cable Length | 9.0 Meters (±2%) |
| System Compatibility | 3300 XL 8mm Proximity Probes |
| Impedance | 50 Ohms (Nominal) |
| Attenuation | < 0.2 dB/m @ 1 MHz |
| Capacitance | 27.5 pF/ft (Typical) |
| Temperature Range | -51°C to +175°C (-60°F to +347°F) |
| Jacket Material | Tefzel (ETFE) or Teflon (FEP) |
| Connector Type A | ClickLoc® (Probe End) |
| Connector Type B | ClickLoc® or BNC (Proximitor End, verify suffix) |
| Shielding | Double-shielded (Silver-plated copper) |
| Minimum Bend Radius | 25 mm (1.0 inch) |
Product Introduction
The Bently 330180-90-00 is a 9.0-meter extension cable designed specifically for the 3300 XL 8mm proximity transducer system. It bridges the gap between the ruggedized probe installed in the machinery and the proximitor sensor located in a control cabinet or junction box.Signal integrity is the primary differentiator for this cable. Unlike generic coaxial options, this assembly maintains a strict 50-ohm impedance profile to prevent signal reflection errors that cause false vibration trips. Field measurements on refurbished units show signal loss typically under 1.5 dB across the full 9-meter length at 1 MHz, well within OEM tolerance limits.
Installation & Configuration Guide
Installation & Configuration GuidePhase 1: Preparation (10 min)
- Ensure the machinery is stopped and locked out (LOTO).
- Verify the required total system length (Probe + Cable + Extender = 5m or 9m standard).
- Inspect the new cable jacket for cuts or abrasions. (Even small nicks in Teflon can lead to oil wicking).
- Have a torque wrench ready for connector tightening.
Phase 2: Removal of Old Cable (5–10 min)
- Disconnect the cable from the proximitor sensor first.
- Trace the cable route and release any clamps or ties.
- Unscrew the ClickLoc® connector at the probe end.
- Gently pull the cable through the conduit or routing path. Do not yank.
Phase 3: Installation (10 min)
- Route the new 330180-90-00 along the exact same path as the old one.
- Avoid sharp bends; maintain a radius greater than 25mm.
- Connect the probe end first. Hand-tighten the ClickLoc® nut, then torque to 15-20 in-lbs.
- Connect the proximitor end. Ensure the outer shield makes solid contact with the connector body.
Phase 4: Power-On & Test (10 min)
- Re-energize the monitoring system.
- Check the “OK” LED on the proximitor or monitor channel.
- Measure the DC bias voltage at the test point. Expect -10V DC ± 2V for a standard gap setting.
- Perform a gap calibration if the system requires it. A fluctuating voltage indicates a bad shield connection.
Troubleshooting Quick Reference
| Symptom | Probable Cause | Action |
|---|---|---|
| Erratic Voltage Reading | Loose shield connection or broken center conductor | Reseat connectors; check continuity of center pin and shield. |
| Voltage Out of Range | Cable length mismatch or damaged dielectric | Verify part number matches system requirement (5m vs 9m). |
| High Noise Floor | Ground loop or EMI interference | Check single-point grounding; ensure cable is away from VFD lines. |
| Intermittent Signal | Cracked connector or internal wire break | Flex the cable near connectors while monitoring voltage. Replace if unstable. |
| Oil in Connector | Jacket breach allowing oil wicking | Inspect jacket for damage. Oil inside changes dielectric constant, ruining accuracy. |
Dimensions, Mounting & Wiring Notes
- Physical Size: Flexible cable, 9.0 meters long. Diameter approx. 5.5 mm.
- Mounting: Secure with non-conductive cable ties every 300mm. Avoid metal clamps that can crush the Teflon jacket.
- Connector Notes: The ClickLoc® design prevents accidental disconnection but requires proper alignment. Do not cross-thread.
- Warning: Never splice these cables. Splicing introduces impedance mismatches that invalidate the calibration curve. If the length is wrong, order the correct part number.
FAQ
Q: Can I use a generic 50-ohm cable instead of the 330180-90-00?
A: Technically you can connect it, but don’t. Generic cables often have different capacitance per foot. This shifts the slope of the transfer function, meaning your vibration readings will be inaccurate. You might miss a bearing failure because the scale is wrong.Q: My old cable was 8.5 meters. Will this 9.0-meter unit work?
A: No. The 3300 XL system relies on specific total lengths (usually 5m or 9m) to match the proximitor’s compensation circuitry. Using an odd length like 8.5m will result in significant linearity errors. You must replace the probe and cable as a matched set or use the exact specified extension.Q: How do I know if the Teflon jacket is compromised?
A: Look for discoloration or a greasy feel near the ends. Oil wicks up inside the braid very quickly. If you see oil at the connector but the damage is meters away, the cable is already ruined internally. Replace it immediately.Q: Is the “00” suffix important in 330180-90-00?
A: Yes. The suffix often denotes the connector type on the proximitor end (e.g., ClickLoc vs. BNC). Check your existing proximitor model. If you buy the wrong connector, you’ll need an adapter, which adds another potential failure point.Q: What is the shelf life of these cables?
A: Indefinite, provided they are stored properly. However, the Teflon can become brittle if exposed to UV light or extreme cold for years. We inspect flexibility on all surplus stock before shipping. If it cracks when bent by hand, we scrap it.Q: I’m getting a “Probe Fault” alarm after installation. What now?
A: First, check the DC resistance of the center conductor. It should be very low (< 5 ohms). Then check insulation resistance between center and shield (> 100 MΩ). If both are good, the issue might be the probe tip itself or the proximitor, not the cable. Swap the cable with a known good one to isolate the variable.
