Description
At-A-Glance Executive Brief
- Model: 21747-080-01
- Brand: Bently Nevada
- Part Type: Proximity Probe Extension Cable
- System Compatibility: 7200 Series Transducer Systems
- Lifecycle Status: Legacy / Mature Hardware Support
Technical Introduction
Signal attenuation and grounding loops in legacy vibration monitoring loops cause erratic readings on critical turbomachinery. Splicing damaged cabling or using incorrect replacement lengths alters system calibration and invalidates established vibration baselines. The Bently Nevada 21747-080-01 provides an exact-match 8.0-meter coaxial link designed to maintain precise electrical impedance between the probe tip and Proximitor monitor.
Core Technical Specifications
- Manufacturer: Bently Nevada (Baker Hughes)
- Series: 7200 Series
- Cable Length: 8.0 meters (80 decimeters)
- Armor Type: Stainless steel armor
- Application: Proximity transducer signal extension
- Condition Options: New Surplus (NSFP) / Refurbished
Field Engineer’s Tech Notes
- Impedance and Length Matching: The 7200 series system is calibrated for specific total electrical lengths combining the probe, extension cable, and monitor. Substituting an 8-meter extension cable requires verifying that the total loop capacitance matches the Proximitor calibration to prevent scale factor drift.
- Shield Grounding: Ensure the stainless steel armor and coaxial shield maintain proper isolation from machine casing grounds except at the designated termination point to prevent noise injection into the dynamic vibration channels.
Adaptive QA & Testing Protocol
Verifying this extension cable involves testing electrical continuity across the center conductor and outer shield, performing insulation resistance checks to check for jacket breakdown, and measuring coaxial impedance to confirm signal integrity across high-frequency ranges. Test documentation and isolation checks are available upon request to verify hardware readiness prior to field installation.
Buyer’s FAQ
- Q: Is this cable compatible with 3300 series Proximitors?
- A: No, the 21747 part number belongs specifically to the legacy 7200 series transducer line and utilizes different connector pin configurations than the 3300 series.
- Q: What condition is the part supplied in?
- A: We stock this item in New Surplus (NSFP) and fully tested refurbished conditions, backed by a standard industrial warranty.
- Q: What is the typical lead time for urgent plant shutdowns?
- A: Stocked units ship same-day from our US warehouse to minimize turbine and compressor downtime.
- Q: Can I request traceability documents?
- A: Yes, traceability and quality inspection reports are provided upon request for internal audit compliance.
- A: Yes, traceability and quality inspection reports are provided upon request for internal audit compliance.
