Bently Nevada 330173-00-02-10-02-CN 3300 XL Proximity Probe

Overview

Bently Nevada 330173-00-02-10-02-CN 3300 XL Proximity Probe: Migration-Ready Replacement for Legacy Vibration Monitoring Systems

The Bently Nevada 330173-00-02-10-02-CN is a 3300 XL Series eddy-current proximity probe engineered for direct replacement in legacy vibration monitoring and machinery protection systems. As rotating equipment fleets age and OEM support for older Bently Nevada 3300 Series hardware is phased out, plant engineers and reliability teams increasingly require a verified, migration-ready substitute that preserves existing wiring infrastructure, rack geometry, and signal chain integrity. The 330173-00-02-10-02-CN fulfills this requirement with a 10 mm probe tip diameter, 2-metre armored extension cable, and a standard -18 VDC power supply input compatible with the 3300 XL monitor chassis.

This probe is designed for radial and axial shaft displacement measurement on turbines, compressors, pumps, and gearboxes where continuous online monitoring is mandatory. Its 200 mV/mil (7.87 V/mm) output sensitivity is factory-calibrated to interface directly with the Bently Nevada 3300/16 and 3300/20 monitor cards without requiring signal conditioning adjustments. For sites migrating from the earlier 7200 Series or 3300 NSv monitor platforms, the 330173-00-02-10-02-CN provides a documented upgrade path that eliminates the need to re-engineer the entire monitoring loop.

Migration Compatibility Table

Retrofit Planning for Existing Automation Systems

A successful retrofit of the 330173-00-02-10-02-CN into an operating plant begins well before the maintenance window opens. The first step is a power budget review of the 3300 XL driver module — typically the Bently Nevada 330130 proximitor/driver — to confirm that the -18 VDC supply rail can sustain the probe’s quiescent current draw alongside any co-located channels. Where multiple probes share a single driver chassis, engineers should verify that the 3300 XL rack’s internal bus capacity is not already at its rated limit before adding replacement channels.

Terminal wiring is the next critical checkpoint. The 330173-00-02-10-02-CN uses a three-conductor shielded cable (probe, driver, common) that maps directly to the existing terminal block assignments on the 3300/16 or 3300/20 monitor card. No re-labeling or jumper changes are required if the original wiring was installed to Bently Nevada standard. However, if the site previously used a 7200 Series probe with a different shield-drain configuration, the junction box wiring should be inspected and corrected before the new probe is energized.

For plants running a Bently Nevada 3500 Series rack in parallel — for example, a 3500/40M Proximitor Monitor handling critical turbine channels — the 330173-00-02-10-02-CN is equally compatible, allowing a phased migration where 3300 XL channels are replaced first while the 3500 rack continues to protect the most critical measurement points. This approach is particularly effective in combined-cycle power plants where both legacy and current-generation Bently Nevada hardware coexist in the same control cabinet.

I/O mapping should be reviewed in the DCS or safety system historian. If the plant uses a Modbus RTU or FOUNDATION Fieldbus gateway to aggregate vibration data from the 3300 XL monitors into a Honeywell DCS or Emerson DeltaV environment, the channel address assignments must be confirmed unchanged after the probe swap. A mismatch between the physical channel number and the historian tag will produce a silent data gap that may not be detected until the next scheduled audit.

Where HMI faceplate graphics reference specific probe tag names or alarm setpoints, the control room operator should be briefed before the replacement begins. The 330173-00-02-10-02-CN does not alter the signal range or alarm threshold logic, but any HMI screen that displays raw gap voltage should be verified against the new probe’s actual gap reading during commissioning. Signal isolators or barriers installed between the proximitor output and the DCS analog input card should also be checked for input impedance compatibility — most galvanic isolators rated for 200 mV/mil probes will pass the signal without adjustment.

Finally, confirm that the spare programming cable and laptop loaded with Bently Nevada System 1 or Orbit software is available on-site before the maintenance window begins. While the 330173-00-02-10-02-CN itself requires no firmware configuration, the monitor card may need a channel enable/disable cycle to clear any latched fault condition from the previous probe’s removal.

Downtime Control During System Migration

Minimizing unplanned downtime during a proximity probe replacement requires a structured pre-outage checklist and a clear rollback plan. Before the maintenance window, the existing probe’s gap voltage should be recorded at operating temperature — typically between -9.5 VDC and -10.5 VDC for a correctly gapped 10 mm probe — so that the replacement can be verified against the same baseline without relying on memory or informal notes.

The original program logic in the 3300 XL monitor card does not need to be modified for a like-for-like probe replacement. Alert and danger setpoints, time delays, and voting logic remain intact. This is a significant advantage over platform migrations that require re-engineering the entire protection loop. The maintenance team should, however, place the affected channel in bypass mode through the 3300 XL front-panel keypad or through System 1 software before disconnecting the probe, to prevent a spurious trip signal from reaching the turbine trip relay or the ESD system.

Physical installation of the 330173-00-02-10-02-CN follows the standard Bently Nevada probe gapping procedure: thread the probe into the boss until it contacts the shaft, then back out to achieve the target gap voltage. A calibrated digital voltmeter connected to the driver output terminals provides real-time feedback during gapping. Once the gap voltage is within specification, the locknut is torqued to the manufacturer’s value and the bypass is removed. Total elapsed time for a single-channel replacement by a trained technician is typically 30 to 60 minutes, making it feasible to complete within a short planned outage or during a scheduled load reduction window.

For sites where continuous operation is mandatory, a hot-swap strategy using a pre-gapped spare probe and a pre-staged junction box connection can reduce the channel outage to under 15 minutes. This approach requires that the replacement probe be gapped on a bench fixture using a steel target of the same material as the monitored shaft, and that the gap voltage be pre-set before the probe is installed in the field. KNMKS supplies the 330173-00-02-10-02-CN with a factory test report confirming output linearity and sensitivity, which supports this pre-staging workflow.

Retrofit Support FAQ

Q1: Is the 330173-00-02-10-02-CN a direct replacement for the Bently Nevada 330173-00-02-10-02 (without the -CN suffix)?
A: Yes. The -CN suffix denotes the country-of-origin documentation variant required for Chinese customs clearance. The electrical and mechanical specifications are identical to the standard 330173-00-02-10-02. No wiring, gapping, or monitor card configuration changes are required when substituting one for the other.

Q2: What commissioning tests are required after installation?
A: The minimum commissioning requirement is a gap voltage verification at the driver output terminals, confirming a reading of -10 VDC ±0.5 V with the probe correctly gapped to the shaft. A slow-roll vibration check at shaft speeds below 600 RPM is recommended to confirm that the signal noise floor is within the monitor card’s acceptance threshold. No software upload or parameter change is required on the 3300 XL monitor card.

Q3: Does KNMKS provide pre-shipment testing for the 330173-00-02-10-02-CN?
A: Yes. Every unit is tested for output sensitivity, linearity across the measurement range, and cable continuity before shipment. A factory test report is included with each unit. Stock is maintained in our warehouse to support urgent replacement orders, with same-day dispatch available for in-stock items.

Q4: What support terms coverage applies to this probe?
A: The 330173-00-02-10-02-CN carries a support terms confirmed by quotation from the date of shipment, covering manufacturing defects in materials and workmanship. Support requests are processed directly through KNMKS. Contact [email protected] or call +86 18359268345 to initiate a support terms or technical support request.

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Product Identification

Brand / Ecosystem

Bently Nevada
Bently Nevada

Model / Series

330173-00-02-10-02-CN
Bently Nevada 3300 XL / 3301 Series

Product Family

Sensors

Availability Status

Available on request after model and quantity confirmation

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B2B RFQ, replacement inquiry and project spare-part request

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Photoelectric, proximity and process sensors

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Machine detection and replacement inquiry

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• NPN/PNP, analog and digital output checking
• Connector and cable compatibility review
• Fast inquiry support for maintenance teams

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