The Vibro-Meter EA402 (913-402-000-013) is a high-temperature coaxial extension cable designed for TQ proximity measurement systems. Featuring robust FEP insulation and EMI shielding, this cable ensures precise signal transmission for vibration and displacement monitoring in steam turbines and industrial compressors.
The Vibro-Meter EA402 functions as a critical extension cable within the TQ series of proximity measurement systems, specifically designed to bridge the gap between a proximity transducer and a signal conditioner. This cable acts as a low-capacitance transmission line that preserves the integrity of high-frequency displacement signals. By utilizing a rugged coaxial construction, the EA402 ensures that the delicate bridge impedance of the sensor remains stable over long distances. Furthermore, the 913-402-000-013 variant features a specific length and protective sleeving tailored for industrial machinery monitoring. Consequently, this component is essential for accurately measuring vibration, speed, and axial position in large rotating equipment.
To withstand the rigorous conditions found in power plants and refineries, the EA402 utilizes a high-performance FEP (Fluorinated Ethylene Propylene) jacket. This material provides exceptional resistance against corrosive chemicals, high humidity, and extreme temperatures ranging from -55°C to +200°C. Additionally, the cable incorporates a dense metallic shield that actively suppresses electromagnetic interference (EMI) and radio frequency interference (RFI). Because signal noise can lead to false alarms in protection systems, this robust shielding is vital for maintaining a high signal-to-noise ratio. Moreover, the optional stainless steel flexible conduit offers mechanical protection against crushing or abrasion in high-traffic industrial areas.
Meggitt (Vibro-Meter) has engineered the EA402 with precision-machined miniature coaxial connectors to facilitate a secure and repeatable connection. These connectors feature a locking mechanism that prevents accidental disconnection due to machine vibration. In addition to its physical durability, the cable is electrically matched to the TQ402 and TQ412 transducers, which simplifies the calibration process of the entire measurement chain. As a result, maintenance teams can replace damaged cables without needing to recalibrate the associated IQS450 signal conditioner. This “plug-and-play” compatibility significantly reduces downtime during routine inspections of steam turbines, gas turbines, and large compressors.
The Bently Nevada 330730-080-00-00 functions as a high-precision signal conduit within the 3300 XL 11mm Proximity Transducer System. This specific cable model enables the seamless transmission of displacement and vibration data from the proximity probe to the Proximitor sensor. By maintaining a constant electrical impedance, the cable ensures that the monitoring system captures accurate mechanical data from high-speed rotating assets.
Technicians primarily deploy the 3300 XL 11mm system when an application requires a broader linear range than standard 8mm sensors can provide. Consequently, this extension cable becomes a critical component in monitoring large-scale machinery where shaft movement or clearances are more substantial.
Brand: Bently Nevada (Baker Hughes)
Model/Part Number: 330730-080-00-00
System Series: 3300 XL 11mm
Cable Length: 8.0 meters (approx. 26.2 feet)
Armor Option: Non-armored (00 configuration)
Connector Option: Standard ClickLoc coaxial connectors
Agency Approvals: Multiple approvals for hazardous areas
Net Weight: 0.28 kg
Beyond basic signal relay, the 330730-080-00-00 extension cable actively supports predictive maintenance strategies. By delivering high-fidelity vibration signals, the cable allows the diagnostic system to identify early-stage faults such as bearing wear, rotor imbalance, or shaft misalignment. Furthermore, this proactive data stream helps operators avoid catastrophic mechanical failures and reduces the high costs associated with unplanned downtime.
Specific applications include:
Monitoring axial position and radial vibration in large steam or gas turbines.
Tracking shaft displacement in high-capacity centrifugal compressors.
Providing phase reference signals via Keyphasor integration for speed and timing analysis.
Bently Nevada manufactures the 330730-080-00-00 to withstand the rigorous thermal and chemical conditions found in power plants and refineries. Although this version lacks external armor, the high-quality jacketing material provides excellent flexibility and chemical resistance. Additionally, the patented ClickLoc connectors facilitate a secure, vibration-proof connection. These connectors snap firmly into place, ensuring that electrical continuity remains intact even when the machinery experiences intense high-frequency oscillations.
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