Bently Nevada 21747-085-00 Extension Cable 8.5m

Bently Nevada 21747-085-00 Proximitor Probe Extension Cable

Product Introduction

The Bently Nevada 21747-085-00 is a high-quality extension cable for the 7200 Proximity Transducer System. This cable serves as a critical link between the sensing probe and the Proximitor sensor. Furthermore, it reliably transmits the vital vibration and position signals required for effective machinery protection. The 8.5-meter length provides substantial flexibility, enabling remote sensor placement for convenient installation. Specifically, this unarmored version offers a cost-effective solution for standard industrial environments.

Technical Specifications

The Bently Nevada 21747-085-00 cable operates on the eddy current principle. It is designed to maintain signal integrity over its entire length. The calibrated range for the system is 80 mils (2.0 mm). The scale factor is 200 mV/mil (7.87 V/mm) with a ±4% accuracy. Moreover, the frequency response is flat from 0 to 10 kHz.

The Proximitor requires a power input between -17.5 Vdc and -26 Vdc. This cable is compatible with both 5 mm and 8 mm probes. It helps achieve a total system length of either five or nine meters from the probe tip. Consequently, this standardization ensures all components are interchangeable. The cable itself is a 3-conductor, shielded type to prevent electrical interference.

Environmental and Mechanical Limits

This extension cable is built for demanding industrial applications. It operates reliably in temperatures ranging from -34°C to +177°C. Furthermore, it can withstand up to 95% non-condensing relative humidity.

The corrosion-resistant design ensures operation is unaffected by contact with various substances. These include air, water, lube oil, and some chemicals like sulfuric acid (10%) or MEK. However, please note that this model features the "00" armor option, meaning it is supplied without stainless steel armor. Therefore, while durable, it may not be suitable for installations with a high risk of physical abuse.

Installation Guidelines

Installing the Bently Nevada 21747-085-00 is a straightforward process. First, always verify that the total electrical length of the probe lead and this extension cable matches the system length requirement. Second, secure the cable using mounting clips to prevent damage and strain.

Next, join the coaxial connectors by hand-tightening them firmly. For insulation, apply self-fusing silicone tape over the connection point. However, do not use this tape in areas exposed to turbine oil. Finally, ensure the cable is routed away from high-voltage sources and sharp edges.

Packaging List

• Bently Nevada 21747-085-00 Extension Cable (1 unit)

Shipping Information

This item ships from our facility via FedEx, UPS, or DHL. We will dispatch it within 24 hours of receiving your order.

Frequently Asked Questions (FAQ)

1. What is the exact length of the Bently Nevada 21747-085-00 cable?
The cable length option "085" designates a length of 8.50 metres (approximately 335 inches).

2. What does the "00" armor option mean for this model?
The "00" option indicates that this specific 21747-085-00 cable is supplied without additional stainless steel armor. It is designed for standard industrial use where physical protection is not a primary concern.

3. Is this extension cable compatible with the 3300 XL series?
Yes. The 21747-085-00 is designed for the 7200 system but uses the same type of connectors and signal requirements. It is fully compatible with Bently Nevada 3300 XL 5mm and 8mm probes and Proximitors.

4. How should I connect this extension cable to the probe?
The probe lead and the extension cable connect via coaxial connectors. Ensure they are joined and tightened to "finger tight." You should then insulate the connection with self-fusing silicone tape.

5. What is the frequency response of the system using this cable?
The combined system has a frequency response of 0 to 10 kHz (0 to 600,000 cpm) with a deviation of less than -5% at the upper limit.