Overview
Configured for shaft phase reference and speed signal processing in the Bently Nevada 3300 System, the Bently Nevada 3300/48-01-01-01-00 (3300/48 Keyphasor Monitor) provides direct electrical signal conditioning for rotating machinery timing inputs from proximity probes or magnetic pickups.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 3300/48-01-01-01-00 |
| Brand | Bently Nevada |
| Origin | USA |
| Product Type | Keyphasor Monitor |
| Operating Temp | -30 deg C to +65 deg C |
| Power Consumption | Powered from 3300 rack backplane, +24 VDC / -24 VDC rails |
| Channel Configuration | Single-channel Keyphasor input |
| Input Type | Proximity probe or magnetic pickup signal |
| Frequency Range | Up to 100 kHz, dependent on transducer configuration |
| Trigger Output | Buffered front-panel and rear-panel Keyphasor output |
| Recorder Output | 4-20 mA or 1-5 VDC proportional speed output |
| Signal Access | Unfiltered raw signal available through front-panel connector |
| Humidity Range | Up to 95% relative humidity, non-condensing |
Rotor Dynamics Signal Processing and Probe Interface
The 3300/48 processes once-per-revolution timing signals for phase measurement, vibration analysis, and dynamic balancing operations. The monitor accepts eddy-current probe signals and magnetic pickup inputs, then conditions the trigger waveform for the 3300 monitoring rack.
Additionally, the module supports eddy-current probe scaling requirements by maintaining signal compatibility between probe output characteristics and Keyphasor timing detection. The system uses gap voltage validation procedures, including -10 VDC target checks, to confirm correct proximity probe installation and operating range.
The monitor supports rotor dynamics analysis by providing stable phase reference information for vibration vector calculations. Furthermore, internal signal conditioning reduces timing errors caused by electrical noise and helps limit cross-talk effects between monitoring channels.
Frequently Asked Questions
Q: What transducer types can the 3300/48 accept?
A: The module accepts Bently Nevada proximity probe signals and compatible magnetic pickup inputs for Keyphasor timing detection.
Q: Does the 3300/48 provide speed measurement output?
A: Yes. The module provides proportional recorder outputs using 4-20 mA or 1-5 VDC signals based on shaft speed.
Q: How does the module receive operating power?
A: The 3300/48 receives power through the Bently Nevada 3300 rack backplane using the system power rails.
Field Installation Guidelines
Install the 3300/48 module in the designated Bently Nevada 3300 rack slot and verify backplane connections before operation.
Connect Keyphasor input wiring according to the selected transducer type. Use shielded signal cables for proximity probe and magnetic pickup connections, and terminate cable shields according to site grounding practices.
Verify probe gap voltage before commissioning. For eddy-current probe applications, confirm the gap voltage approaches the required -10 VDC target range to maintain correct signal scaling.
Route signal cables separately from high-current power conductors to reduce electrical interference. Check the front-panel trigger output and system status indicators after installation to confirm correct signal detection.
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