Description
Bently Nevada 3300/25 Dual Accelerometer Monitor
Configured for casing vibration measurement from dual accelerometer inputs in the 3300 Monitoring System, the Bently Nevada 3300/25 Dual Accelerometer Monitor (3300/25) provides direct physical/electrical execution of two-channel vibration signal conditioning, alarm comparison, and proportional output generation.
SuffixBreakdown&ModelMatrix
The 3300/25 is a fixed functional module designation within the Bently Nevada 3300 series. No further functional subdivision or suffix-based performance matrix is defined in the provided technical dataset. Electrical configuration, scaling, and approvals are determined by system-level implementation and hardware revision.
HardwareSpecifications
| Parameter |
Specification |
| ModelBrand |
Bently Nevada 3300/25 |
| Origin |
USA (manufacturer reference: Bently Nevada / Baker Hughes) |
| OperatingTemp |
0 degC to +65 degC |
| Input Channels |
2 independent accelerometer/velocity inputs |
| Signal Processing |
Dual-channel vibration conditioning and scaling |
| Output Type |
4-20 mA DC, buffered raw vibration output |
| Alarm Functions |
Alert and Danger setpoints per channel |
| Relay Output |
SPDT or DPDT, epoxy sealed contacts |
Eddy-current probe scaling and gap voltage validation (-10 VDC targets)
The 3300/25 signal processing chain is aligned with Bently Nevada transducer scaling architecture, including compatibility with eddy-current proximity probe systems where applicable in the 3300 platform. Internal scaling logic supports gap voltage validation referenced to standard -10 VDC proportional signal ranges used in proximity measurement chains. Cross-channel comparison logic is implemented to reduce measurement deviation between paired vibration inputs under steady-state rotational conditions.
FrequentlyAskedQuestions
Q: Can the 3300/25 process two independent accelerometer signals simultaneously?
A: Yes. The module contains two isolated processing channels with independent scaling and alarm evaluation paths.
Q: Does the module output raw vibration signals for external diagnostics?
A: Yes. Buffered outputs provide unfiltered dynamic signals via coaxial front-panel connectors and rear terminals.
Q: Is channel-to-channel signal interaction present under normal operation?
A: No intentional coupling exists; internal architecture is designed for cross-channel isolation within hardware limits.
FieldInstallationGuidelines
-
Install module in a compatible Bently Nevada 3300 rack system with correct backplane seating.
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Maintain separation between signal wiring and power conductors to reduce induced noise.
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Use shielded cable for accelerometer inputs; terminate shield at single-point ground only.
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Ensure relay output wiring conforms to specified contact rating limits (5 A at 120 Vac / 24 Vdc).
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Verify proper calibration scaling before connecting to PLC or DCS analog input channels.
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Avoid mechanical stress on front-panel connectors to preserve buffered output integrity.
