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Bently Nevada 3300/50-01-01-00-00 Tachometer Monitor
Configured for real-time shaft speed measurement in machinery protection systems, the Bently Nevada 3300/50-01-01-00-00 (3300/50 Tachometer Monitor) provides direct physical/electrical execution of tachometer signal conditioning and speed conversion within 3300 Series monitoring architectures. The module processes pulse inputs from proximity probes or magnetic pickups for RPM derivation and alarm evaluation.
HardwareSpecifications
| Parameter |
Specification |
| ModelBrand |
Bently Nevada 3300/50-01-01-00-00 |
| Origin |
USA |
| Weight |
1.42 kg (approx) |
| OperatingTemp |
0 degC to 65 degC |
| PowerConsumption |
Not specified in provided data |
| Signal Input |
Proximitor probe / magnetic pickup |
| Frequency Range |
0.01 Hz to 50 kHz |
| Output Signal |
4-20 mA or 1-5 VDC configurable |
| Relay Output |
Alert / Danger SPDT relays |
Eddy-Current Probe Scaling and Rotor Dynamics Processing (Bently Nevada)
The module input conditioning stage is aligned with eddy-current proximity probe scaling conventions, supporting gap voltage validation referencing -10 VDC operating targets at the transducer interface. Rotor dynamics interpretation is derived from pulse-per-revolution conversion logic, allowing speed instability detection under variable shaft loading conditions. Cross-talk suppression is implemented through isolated input conditioning and signal discrimination filtering to maintain channel integrity in multi-probe installations.
FrequentlyAskedQuestions
Q: Can the 3300/50 accept both proximity probe and magnetic pickup inputs?
A: Yes. The input stage is designed for both signal types with impedance and conditioning adapted for pulse-based RPM measurement.
Q: Does the module support hot-swap operation in live systems?
A: The 3300 series architecture does not define full hot-swap capability; removal typically requires system shutdown or controlled maintenance bypass depending on rack configuration.
Q: How are alarm thresholds executed internally?
A: Alert and Danger setpoints are processed through onboard comparator logic driving SPDT relay outputs with configurable energization states.
FieldInstallationGuidelines
Maintain shield continuity from probe cable to rack termination to reduce electromagnetic coupling errors. Ensure proper grounding at a single-point earth reference to avoid ground loop injection into the tachometer input stage. Verify correct polarity and termination resistance for proximity probe wiring before energizing the system. Maintain separation between signal cabling and high-voltage conductors to preserve pulse integrity.
