Overview
The Bently Nevada 3300/48-01-01-01-00, also cataloged as the 3300/48 Case Expansion Monitor Module, operates as a dedicated hardware component for measuring thermal casing expansion signals within the Bently Nevada 3300 Series Monitoring System. The module processes two DC LVDT inputs and provides direct casing movement indication, alarm processing, and buffered diagnostic outputs.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 3300/48-01-01-01-00 |
| Brand | Bently Nevada |
| Origin | USA |
| Product Type | Case Expansion Monitor Module |
| Monitoring System | Bently Nevada 3300 Series |
| Input Signal | Two DC LVDT transducer inputs |
| Measurement Function | Thermal growth and casing expansion monitoring |
| Operating Modes | Direct Mode and Differential Mode |
| Alarm Function | Alert and Danger setpoints with digital adjustment |
| Display Type | Non-multiplexed vertical LCD bargraph display |
| Display Resolution | 63 segments per channel |
| Input Impedance | 1.0 MOhm |
| Signal Conditioning Accuracy | Typical +/-0.33% of full scale at +25 deg C; maximum +/-1.0% |
| Recorder Outputs | +4 to +20 mA, 0 to -10 VDC, or +1 to +5 VDC programmable outputs |
| Buffered Transducer Output | Front panel BNC connector and rear terminal connections |
| Power Supply | 3300 rack backplane power |
| Power Consumption | 1.5 W nominal |
| Rack Position | Single-slot module, positions 3 through 14 |
| Operating Temp | 0 deg C to +65 deg C |
| Storage Temp | -40 deg C to +85 deg C |
| Relative Humidity | Up to 95% non-condensing |
| Dimensions | Standard 3300 single-width monitor card format |
| Weight | Approx. 1.0 kg |
Eddy-Current Probe Scaling and Rotor Dynamics Monitoring
The Bently Nevada 3300/48 module processes displacement-related mechanical signals from LVDT transducers for casing expansion measurement. Therefore, the module configuration focuses on accurate relative movement detection between the machine casing and foundation reference point.
The monitor supports differential expansion analysis by comparing two independent LVDT channels. Additionally, the signal conditioning circuit maintains measurement accuracy across operating temperature variations and provides buffered outputs for external diagnostic equipment.
The Bently Nevada 3300 platform uses validated displacement measurement principles similar to other machinery monitoring functions, including gap signal verification and rotor dynamics evaluation. The system design supports accurate interpretation of shaft and casing movement behavior during thermal transients.
Frequently Asked Questions
Q: What type of transducers does the Bently Nevada 3300/48-01-01-01-00 support?
A: The module accepts two DC LVDT transducer inputs for measuring casing expansion and thermal growth movement.
Q: Does the 3300/48 provide direct and differential measurement functions?
A: Yes. The module provides Direct Mode for individual channel monitoring and Differential Mode for calculating expansion difference between two LVDT inputs.
Q: What diagnostic outputs are available from the module?
A: The module provides buffered transducer outputs through front panel BNC connectors and rear terminal connections for external monitoring equipment.
Field Installation Guidelines
- Install the module into an available single slot position within the Bently Nevada 3300 rack following the rack wiring configuration requirements.
- Connect DC LVDT transducers using shielded signal wiring to reduce electrical noise interference. Ground cable shields according to the plant instrumentation grounding practice.
- Verify LVDT polarity, signal scaling, and mechanical alignment before placing the monitor into service.
- Confirm that the casing expansion measurement direction matches the configured engineering scale and alarm settings.
- Route transducer wiring separately from high-voltage power cables and switching circuits to minimize signal disturbance.
- Perform functional verification after installation by checking channel indication, recorder outputs, and alarm relay operation.
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