The Bently Nevada 330730-080-03-00, also cataloged as the 330730 Extension Cable, operates as a dedicated hardware component for signal transmission between 11 mm proximity probes and Proximitor sensors within 3300 XL monitoring platforms. This cable maintains the electrical path for high-frequency radio signals required to capture non-contacting vibration and position data.

Configuration Analysis

• 330730: 3300 XL 11 mm Extension Cable

• 080: Cable Length (8.0 meters)

• 03: Connector Type (Miniature ClickLoc with connector protector)

• 00: Agency Approval (Not required)

Hardware Specifications

Signal Integrity & Rotor Dynamics

The 3300 XL 11 mm system is engineered for applications requiring increased linear range compared to 8 mm systems. This extension cable is a calibrated component of the resonant circuit. Achieving high-fidelity rotor dynamics analysis requires strict gap voltage validation at -10 VDC at the monitor output. Cross-talk suppression is maintained through triple-shielded coaxial construction, which isolates the 1 MHz carrier signal from environmental electromagnetic interference.

Ordering Information

• 1 x 330730-080-03-00 Extension Cable

• 2 x Connector protectors

• Technical documentation

Field Installation Guidelines

• Bend Radius: Maintain a minimum bend radius of 38 mm to preserve the coaxial geometry and impedance characteristics.

• Conduit Routing: Install within grounded metallic conduit to provide shielding against high-voltage electrical noise.

• Connector Engagement: Fully seat the ClickLoc connection until a mechanical click occurs; secure the connector protector to seal the interface.

• Environmental Sealing: Apply protectors to both probe and sensor coupling points to prevent moisture ingress in industrial environments.

• Grounding: Ensure the signal common remains isolated from the machine chassis to avoid the introduction of ground loops.

Technical Inquiry Index

• Q: Are 11 mm extension cables compatible with 8 mm probes?

  A: No. The 3300 XL 11 mm system is specifically tuned for the inductance of 11 mm probes; mixing components will cause significant measurement non-linearity.

• Q: Can the cable be shortened if it is too long?

  A: No. The system is calibrated for a specific total length. Altering the length changes the resonant frequency and amplitude, rendering measurements invalid.

• Q: What is the benefit of the ClickLoc connector?

  A: It provides a secure, vibration-resistant connection that maintains consistent electrical contact and shielding integrity in high-vibration machinery.

• Q: How do I test the cable for electrical integrity?

  A: Use a digital multimeter to check continuity between the center conductor pins and verify isolation between the center pin and outer shield.

• Q: Does this cable require specific hazardous area approval?

  A: Compatibility with hazardous zones depends on the system installation design; always refer to the specific agency control drawings for the installation.

• Q: What indicates a signal fault?

  A: A fault typically manifests as a stable -24 VDC or 0 VDC reading at the monitor, indicating a broken center conductor or a short to the shield.

• Q: Can I splice the cable using standard RF connectors?

  A: No. Splicing introduces impedance discontinuities that cause signal reflections, resulting in inaccurate vibration readings.

• Q: How often should connections be inspected?

  A: Inspect during major machine turnarounds to ensure connectors remain clean, dry, and securely fastened.