Description

The Bently Nevada 330130-080-02-00, also cataloged as the 330130 Extension Cable, operates as a dedicated hardware component for transmitting high-frequency eddy-current signals within 3500 Machinery Protection Systems platforms. This assembly links an 8 mm proximity probe to a paired Proximitor sensor, establishing an uninterrupted electrical pathway for non-contact displacement data. By maintaining strict impedance matching across its entire length, the cable prevents signal reflection and minimizes attenuation. Consequently, the hardware passes raw voltage variations directly to monitoring instruments to track dynamic vibration and axial position parameters safely.

Suffix Breakdown & Model Matrix

Alphanumeric suffixes dictate the precise mechanical dimensions, protection options, and regulatory approvals configured for this hardware product:

• 330130: Base model designator for the 3300 XL 8 mm Proximity Transducer Standard Extension Cable.
• -080: Specifies a total physical cable length of 8.0 meters (26.2 feet).
• -02: Configures the cable with integrated connector protectors at both ends of the assembly.
• -00: Indicates the omission of specific multi-agency hazardous area safety approvals for this ordering code.

Hardware Specifications

Eddy-Current Probe Scaling and Gap Voltage Validation

The physical cable parameters directly impact the system’s eddy-current probe scaling, which demands a precise 7.87 V/mm (200 mV/mil) output ratio. During initial commissioning routines, field technicians perform gap voltage validation to anchor the sensor loop securely in its linear range. Technicians adjust the probe positioning relative to the shaft target until the Proximitor sensor outputs a baseline voltage of -10 VDC. This stable reference voltage verifies that the target sits exactly at the midpoint of the 80 mil (2.0 mm) measurement window.

Because changing the physical loop length introduces capacitive variations, this 8.0-meter extension cable requires pairing with a 1.0-meter proximity probe. Joining these matching segments completes the mandatory 9.0-meter total system loop configuration. This precise calibration preserves the integrity of rotor dynamics analyses by guaranteeing optimum cross-talk suppression inside crowded wire ways. Conversely, mixing unmatched components alters the total circuit electrical length, which immediately introduces calibration errors and distorts high-frequency machinery diagnostics.

Frequently Asked Questions

Q: How does the integrated connector protector affect the mechanical installation of this cable? A: The connector protector options provide a specialized environmental seal that prevents fluid ingress from corrupting the coaxial junction. However, this protective sleeve increases the outer profile diameter, meaning technicians must utilize larger conduit diameters during field pull-through routines.

Q: Can this 8.0-meter extension cable work interchangeably with a 3300 XL 5.0-meter Proximitor sensor? A: No, because the 5.0-meter Proximitor sensor features internal tuning optimized specifically for a total 5.0-meter electrical length. Deploying an 8.0-meter cable automatically exceeds this tuning ceiling, which shifts the system’s baseline capacitance and invalidates the linear measurement output.

Field Installation Guidelines

• ClickLoc Connector Engagement: Align the male and female gold-plated coaxial interfaces carefully before mating. Push and twist the connectors by hand until the internal ClickLoc mechanism snaps into place; never use mechanical tools like pliers, which instantly deform the delicate internal pins.
• Conduit Routing and Separation: Install the cable body inside dedicated, grounded metal conduits to maximize external cross-talk suppression. Route the low-voltage instrumentation run away from high-current power distribution lines or variable frequency drive cables to block electromagnetic noise induction.
• Bend Radius Protection: Observe a strict minimum bend radius of 25.4 mm throughout the routing path. Kinking or pulling the cable around tight corners deforms the internal fluoropolymer dielectric layer, changing the 75-ohm characteristic impedance and generating signal errors that mimic shaft vibration.