21747-080-01 | Bently Nevada 8m Armored Extension Cable

Introduction to the Bently Nevada 21747-080-01 Extension Cable

When reliable vibration monitoring is critical, the 21747-080-01 from Bently Nevada ensures your proximity probe system performs at its best. This extension cable is designed to connect probes to Proximitors, maintaining signal integrity over a length of 8.00 metres (315 inches). With stainless steel armor, it offers improved resistance to physical abuse, making it a durable choice for demanding industrial environments.

Key Features and Technical Specifications

• Model: Extension Cable
• Manufacturer: Bently Nevada
• Cable Length: 8.00 metres (315 inches)
• Armor Option: With armor
• Power: -17.5 Vdc to -26 Vdc at 12 mA maximum consumption
• Calibrated Range: 80 mils (2.0 mm), beginning at approximately 10 mils (0.25 mm) from probe face
• Scale Factor: 200 mV/mil (7.87 V/mm), ±4% if calibrated as a system
• Linearity: Within 0.8 mils (0.02 mm) of a 200 mV/mil straight line if calibrated as a system
• Frequency Response: 0 to 10 kHz (0 to 600,000 cpm); -5% at 10 kHz
• Temperature Sensitivity: Typically -3% change in scale factor at +150°F (+65°C) at 50 mils gap (1.27 mm)

These specifications ensure accurate and consistent performance, which directly translates to reduced downtime and lower maintenance costs over the system's life.

Applications and Use Cases

The 21747-080-01 is ideal for rotating machinery monitoring, including turbines, compressors, and pumps. In these applications, precise vibration measurement is essential to prevent catastrophic failures. By using this extension cable, you can maintain signal accuracy over longer distances, which is especially valuable in large facilities where sensors are located far from monitoring equipment. Moreover, the armored design protects against physical damage, reducing replacement frequency and associated costs.

Installation and Setup

Installing the 21747-080-01 is straightforward, but proper handling is key. Ensure the cable is routed without sharp bends or kinks to avoid damaging the internal conductors. The armor provides extra protection, but avoid crushing or excessive pulling during installation. For best results, follow the manufacturer's guidelines for cable routing and connection to the Proximitor. Always verify that the cable length matches your system requirements before installation.

Maintenance and Reliability

Regular inspection of the extension cable is recommended to ensure long-term reliability. Check for signs of wear, especially at connection points and along the armor. Because the cable is exposed to environmental factors, periodic visual checks can prevent unexpected failures. The stainless steel armor enhances durability, but it is still wise to inspect for corrosion or damage. By maintaining the cable, you extend the life of your monitoring system and avoid costly replacements.

Compatibility and Integration

The 21747-080-01 is designed to work with Bently Nevada proximity probe systems. It is interchangeable with probes and cables of the same length and Proximitors with the same part number, ensuring seamless integration. This interchangeability simplifies inventory management and reduces the risk of compatibility issues. When upgrading or expanding your monitoring system, this cable offers a reliable connection that maintains signal integrity.

Troubleshooting and Common Issues

If you experience signal loss or erratic readings, first check the cable connections for looseness or corrosion. Ensure the cable is not damaged along its length. The armor can hide internal damage, so if issues persist, test with a known-good cable. Also, verify that the power supply meets the required -17.5 Vdc to -26 Vdc range at 12 mA maximum consumption. By following these steps, you can quickly identify and resolve common problems.

FAQ about the 21747-080-01

Q: What is the length of the 21747-080-01 extension cable?

A: The cable length is 8.00 metres (315 inches).

Q: Does the 21747-080-01 come with armor?

A: Yes, the armor option is with armor, providing improved resistance to physical abuse.

Q: What is the power requirement for this cable?

A: The power requirement is -17.5 Vdc to -26 Vdc at 12 mA maximum consumption.

Q: What is the calibrated range of the system using this cable?

A: The calibrated range is 80 mils (2.0 mm), beginning at approximately 10 mils (0.25 mm) from the probe face.

Q: How does temperature affect the scale factor?

A: Typically, there is a -3% change in scale factor at +150°F (+65°C) at a 50 mils gap (1.27 mm).

Product Support and Availability

The 21747-080-01 is available from Petro Auto Tech, a trusted industrial automation parts supplier. It is new and original in factory packing, with a 12-month factory warranty. For inquiries about availability or technical support, contact Petro Auto Tech directly. Ensure you verify the current lifecycle status before ordering.