Technical Specifications

FAQ

1. What is the primary function of the 21747-085-00 extension cable?

The 21747-085-00 extension cable is used to connect proximity probes, preamplifiers, and vibration monitoring systems, extending the signal path while preserving signal integrity. Its primary function is to ensure that low-level vibration signals are transmitted accurately over longer distances without distortion, enabling reliable machinery condition monitoring and early fault detection in rotating equipment.

2. Where is this cable typically used?

This cable is widely used in industrial rotating machinery monitoring systems, including turbines, compressors, pumps, motors, and generators. It is commonly deployed in industries such as power generation, oil and gas, petrochemicals, and heavy manufacturing, where continuous vibration monitoring is essential for operational safety and predictive maintenance strategies.

3. Why is shielding important in this cable design?

Shielding is critical because the cable carries weak analog signals that are highly sensitive to electromagnetic interference. Industrial environments often contain strong electrical noise from motors, drives, and power cables. The multi-layer shielding helps isolate the signal from external noise sources, ensuring stable transmission and accurate vibration measurement results.

4. How does this cable contribute to measurement accuracy?

The cable maintains consistent impedance and minimizes signal attenuation during transmission. This ensures that the vibration data captured by the probe is faithfully delivered to the monitoring system. As a result, the system can accurately detect mechanical conditions such as imbalance, misalignment, bearing degradation, and other early-stage faults in rotating machinery.

5. What installation practices should be followed?

Proper installation requires routing the cable away from high-voltage power lines and heavy electrical equipment. It should be securely fastened to avoid mechanical stress or vibration-induced movement. The shielding must be properly grounded to ensure effective noise suppression. Excessive bending, stretching, or crushing should be avoided during installation.

6. What are common causes of signal degradation?

Signal degradation can result from poor grounding, damaged shielding, loose connectors, or improper cable routing. Exposure to strong electromagnetic fields or proximity to high-power electrical equipment may also introduce noise. Physical damage due to mechanical stress or improper handling can further reduce signal quality over time.

7. Is this cable suitable for long-term industrial operation?

Yes, the cable is designed for continuous use in demanding industrial environments. It features reinforced mechanical protection and high-performance shielding that allow it to withstand vibration, temperature variations, and electrical noise. When properly installed and maintained, it can provide stable and reliable performance over extended operational periods.

8. How can system reliability be improved when using this cable?

System reliability can be improved by ensuring correct cable routing, maintaining proper grounding, and performing regular inspections of connectors and insulation. Keeping the cable away from high-interference electrical sources and avoiding mechanical stress are also important. Periodic maintenance checks help identify early signs of wear or damage, ensuring long-term stability of the vibration monitoring system.