Description
Bently Nevada 285691-01 3300 XL Proximitor Sensor Module
Configured for conversion of eddy-current proximity probe signals into calibrated displacement and vibration data within 3300 XL monitoring systems, the Bently Nevada 285691-01 (285691-01 Proximitor Sensor Module) provides direct electrical signal conditioning for shaft position measurement across standardized TSI input channels.
Suffix Breakdown & Model Matrix
The 285691-01 is a single defined orderable configuration within the 3300 XL Proximitor Sensor family. No validated sub-variant segmentation or hardware option matrix is defined in the provided dataset. Functional behavior is determined by external probe selection and system-level configuration parameters.
Hardware Specifications
| Parameter |
Specification |
| Model |
285691-01 |
| Brand |
Bently Nevada |
| Weight |
~0.2 kg |
| Dimensions |
76 x 25 x 25 mm |
| Operating Temp |
-35 deg C to +100 deg C |
| Power Consumption |
Not specified |
| Measurement Range |
2 mm to 80 mm (probe dependent) |
| Linear Range |
0.25 mm to 2.0 mm typical |
| Accuracy |
±0.25 percent of full scale |
| Frequency Response |
DC to 10 kHz |
| Input |
3300 XL proximity probe compatible |
| Output Sensitivity |
-200 mV/mil (7.87 mV/um) |
| Power Supply |
-24 VDC nominal |
| Humidity |
Up to 95 percent non-condensing |
| Compliance |
API 670, CE, UL, CSA, RoHS |
Bently Nevada Eddy-Current Signal Conditioning and Cross-Talk Suppression
The module performs eddy-current probe impedance conversion into linearized displacement voltage output using calibrated scaling constants defined for the 3300 XL architecture. Gap-based voltage reference tracking is maintained for shaft centerline measurement consistency. Cross-talk suppression is implemented through internal shielding geometry and grounded reference design, minimizing electrical coupling between adjacent measurement channels under multi-probe configurations. The signal path supports DC to 10 kHz bandwidth for both static position and dynamic vibration extraction.
Frequently Asked Questions (FAQ)
Q: Is the 285691-01 compatible with non-3300 XL probe systems?
A: No. Input conditioning is calibrated for 3300 XL probe electrical characteristics. Mismatched impedance will result in non-linear scaling.
Q: Does the module require external signal conditioning before monitoring input?
A: No external conditioning is required. The module outputs a direct proportional voltage signal suitable for monitoring system acquisition.
Q: What is the behavior under unstable -24 VDC supply conditions?
A: Output accuracy is maintained only within nominal supply tolerance. Deviation outside specified limits may introduce scaling drift or reduced measurement stability.
Field Installation Guidelines
Install the module inside a grounded metallic enclosure to maintain shielding integrity for eddy-current signal paths. Maintain separation between probe wiring and high-voltage switching conductors to reduce electromagnetic interference. Use twisted shielded cables with single-point grounding at the monitoring system end only. Ensure correct routing without tight bends to avoid impedance variation in probe extension lines. Verify stable -24 VDC supply polarity and continuity prior to system energization.
