Product Core Brief
- Model: 330730-040-00-00
- Brand: Bently Nevada (Baker Hughes)
- Series: 3300 XL 11 mm Eddy-Current Proximity Transducer System
- Suffix Decode:
- 040 = Total cable length: 4.0 meters
- 00 = Standard non-armored FEP outer jacket, standard ClickLoc joint
- 00 = No additional hazardous area / third-party agency certifications
- Core Function: Matched-impedance triaxial extension cable transmitting high-frequency eddy-current signals between 3300 XL 11mm proximity probes and matching Proximitor signal conditioners, used for shaft radial vibration, axial thrust displacement, and Keyphasor rotational speed pickup measurements on large gas/steam turbines, compressors and rotating machinery
- Product Type: Fully assembled signal cable with dual-end gold-plated ClickLoc locking connectors
- Key Specs: 4m 50Ω triaxial construction | FluidLoc molded anti-oil-wicking joint | High-temperature FEP insulation | Exclusive match for 11mm probe systems
- Condition: New Original (New Surplus), active OEM sensing spare with no published obsolescence timeline
Key Technical Specifications
| Parameter | Defined Value |
|---|---|
| Total Cable Length | 4.0 m (13.1 ft) |
| Electrical Characteristic | 50Ω triaxial coaxial, low capacitance 69.9 pF/m, factory impedance-matched to eliminate high-frequency signal distortion |
| Insulation & Outer Jacket | FEP fluoropolymer, resistant to turbine lube oil, chemicals and continuous high cabinet temperature |
| Connector Hardware | Dual-end gold-plated ClickLoc lockable connectors, tool-free finger-tight mechanical locking seal |
| Sealing Technology | Patented FluidLoc molded cable joint, prevents lubricant oil wicking into internal cable conductors |
| Operating Temperature Range | −45°C to +100°C continuous ambient cabinet operation |
| Mechanical Bend Limits | Static minimum bend radius 25.4 mm; dynamic flex routing minimum 50.8 mm |
| Axial Tensile Load Rating | Max 330 N (75 lbf) pull strength without joint separation or internal wire breakage |
| System Compatibility | Exclusively matched for 3300 XL 11mm proximity probes and corresponding Proximitor sensors; fully interoperable with all 3500 TSI monitor modules |
| Compliance Standards | API 670 4th Edition, CE EMC Class A industrial equipment certification |
| Assembly Weight | ~1.15 kg complete cable assembly |
| Mechanical Form Factor | Non-armored flexible outer jacket (00 suffix, no stainless steel braided armor) |
| Sensitivity Match | Maintains standard 3.94 V/mm (100 mV/mil) linear sensitivity when combined with matching 11mm probe and Proximitor |
Product Introduction
This triaxial extension cable forms the critical signal transmission link in 3300 XL 11mm eddy-current transducer stacks, bridging bearing-mounted proximity probes and rack-mounted Proximitor signal conditioners. The factory-calibrated matched triaxial design preserves linear gap voltage response over long wiring runs, avoiding vibration measurement drift and orbit distortion under turbine thermal load transients.
FluidLoc molded end joints block machine lubrication oil ingress, a common failure mode for generic aftermarket replacement cables. This unit cannot operate standalone; a complete measurement system requires probe + extension cable + Proximitor conditioner paired with 3500 series monitor racks. Armored variants (suffix 01) are available for heavily abrasive cable routing environments but require larger cable gland fittings and wiring rework for site installation.
Distinction from 330130 series: 330130 is dedicated to 8mm probe systems, while this 330730 series only works with 11mm large-range proximity probes; their connector pinout and internal capacitance parameters are not interchangeable.
Firmware/Software Versions & Upgrade Notes
This cable is a passive analog transmission assembly with no onboard firmware. System compatibility rules apply to paired Proximitor and 3500 rack monitors:Minimum compatible 3500 monitor firmware: Revision G; minimum Rack Configuration Software v2.00. All M-series monitor modules must run unified matching firmware revisions to correctly interpret 3300 XL linear gap voltage characteristic curves.No cable-specific software configuration is required after physical installation; only the total combined length (probe length + 4m extension cable) must be entered into rack configuration software to lock transducer sensitivity calibration. Always verify total system length before commissioning to eliminate static measurement offset errors.
Frequently Asked Questions (FAQ)
- Is hot-disconnecting the cable safe while the 3500 rack remains energized?Proximitor and TSI rack monitors stay powered during connector removal. Unplugging this cable triggers persistent channel fault flags and temporary loss of vibration/thrust position data, but no permanent damage occurs to monitor analog input circuits. Fully re-seat both ClickLoc connectors until the locking tab clicks to clear fault alarms.
- Is this part obsolescent, and are direct drop-in hardware upgrades available?This cable remains an active OEM catalog spare with no formal end-of-life date. The direct mechanical upgrade variant is 330730-040-01-00, which adds stainless steel braided armor for abrasive cabinet routing; it shares identical electrical performance and connector pinout but features thicker outer diameter requiring modified cable gland hardware, so it is not zero-modification plug-and-play.
- Will transducer linearity or gap calibration data erase if the rack loses full power?All system sensitivity and total length calibration parameters store in non-volatile flash memory on the paired 3500 monitor module, not the cable assembly itself. Full rack power loss does not erase transducer configuration data; swapping this unit requires only physical reconnection with no software rework if total system length stays unchanged.
- What warranty terms separate New Surplus inventory from refurbished alternatives?New Surplus cable assemblies carry a 12-month functional warranty covering triaxial impedance consistency, gold connector plating integrity, FluidLoc molded seal performance. Refurbished cables typically offer only 3–6 month limited coverage and carry hidden risks of cracked FEP insulation, worn connector locking tabs, and compromised liquid sealing that cause drifting vibration readings during turbine thermal cycles.
- Why does New Surplus pricing sit higher than generic used/refurbished marketplace listings?All New Surplus cable assemblies complete mandatory standardized QC validation: serial traceability cross-check against OEM production logs, full length impedance and capacitance bench testing, tensile pull-load testing to validate FluidLoc joint adhesion, 1000-cycle connector lock durability testing, and sealed anti-static factory packaging. Refurbished lots skip this multi-step electrical and mechanical validation workflow, introducing unplanned downtime risk for safety-critical turbine vibration and thrust position protection loops.
- Can this cable mate with legacy 8mm 3300 XL proximity probes (33010x series)?No, the ClickLoc internal pinout and 50Ω triaxial capacitance profile are exclusive to 11mm 33070x probe systems. 8mm probe hardware uses dedicated 330130 series extension cables with different electrical matching parameters. Verify against the OEM 3300 XL datasheet before cross-mixing transducer hardware to avoid permanent Proximitor input circuit damage.
- Does the cable locally store vibration waveforms or long-term rotor position trending logs?No, the assembly is a fully passive analog signal transmission component with zero memory or signal processing hardware. All vibration amplitude, axial thrust displacement, and Keyphasor rotational speed trending records are captured and retained exclusively by the Slot1 3500/20 TDI master communication gateway module. This cable only conducts raw high-frequency eddy-current gap signals without modifying or storing measurement data.
