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Product Description
The Bently Nevada 3500/44M Aeroderivitive GT Vibration Monitor is a four-channel instrument designed for continuous vibration monitoring of aeroderivative gas turbines. It provides real-time condition monitoring by comparing measured parameters against configured alarm setpoints, and interfaces with Velomitor sensors and accelerometers. The unit is fully configurable via 3500 rack software, supporting multimode operations and advanced filtering.
Product Applications
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Aeroderivative gas turbine vibration monitoring
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Machinery protection systems
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Condition-based maintenance
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Power generation and industrial gas turbines
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Maritime and offshore rotating machinery
Product Advantages
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Continuous, real-time monitoring with configurable alarms
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Supports multiple operating modes and tracking filters
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Interfaces directly with Velomitor and accelerometer sensors
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Compact design requiring minimal rack space
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Compliance with global standards including ATEX and IECEx
Technical Specifications
| Parameter | Specification |
|---|---|
| Channels | 4 |
| Input signals | Velomitors, accelerometers |
| Power consumption | 7.7 W |
| Frequency response (direct) | 4 Hz – 30 kHz |
| Sensitivity (velocity) | 3.94/5.71 mV/(mm/s) |
| Alarm accuracy | ±0.13% |
| Recorder output | 4–20 mA, proportional |
| Update rate | ≤100 ms |
| Dimensions (Monitor Module) | 241.3 x 24.4 x 241.8 mm |
| Weight (Monitor Module) | 0.91 kg |
| Dimensions (I/O Module) | 241.3 x 24.4 x 99.1 mm |
| Weight (I/O Module) | 0.45 kg |
FAQ
Q1: What is the main purpose of the 3500/44M?
A1: It continuously monitors vibration on aeroderivative gas turbines to detect and alarm abnormal conditions.
Q2: How many channels does the 3500/44M support?
A2: It supports up to 4 monitoring channels.
Q3: Which sensors are compatible with this monitor?
A3: It is compatible with Velomitors and accelerometers via Bently Nevada interface modules.
Q4: Can the 3500/44M operate in hazardous areas?
A4: Yes, it is certified for Class I, Division 2, and ATEX/IECEx Zone 2 environments.
Q5: What is the typical update rate of measurements?
A5: Measurements are updated every 100 milliseconds or faster.
Q6: How many alarm levels can be configured?
A6: Up to eight sets of alert and danger alarm parameters can be configured per channel.
Q7: Does the 3500/44M support multimode operation?
A7: Yes, it can switch between modes based on machine operating conditions.
Q8: How are alarm setpoints adjusted?
A8: Alarm setpoints are adjustable through the 3500 rack configuration software.
Q9: What is the weight of the main module?
A9: The main monitor module weighs approximately 0.91 kg.
Q10: Is the unit compliant with maritime standards?
A10: Yes, it meets DNV GL and ABS classification requirements for ships and offshore units.
Related Models (Same Series or Function)
| Model | Channels | Input Type | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|
| 3500/42M Proximitor | 4 | Proximity & axial | 241.3 x 24.4 x 241.8 | 0.91 |
| 3500/44 Aeroderivative | 4 | Velocity & accel. | 241.3 x 24.4 x 241.8 | 0.91 |
| 3500/40M Proximitor Seismic | 4 | Seismic & prox. | 241.3 x 24.4 x 241.8 | 0.91 |
| 3500/45 Position Monitor | 4 | Position | 241.3 x 24.4 x 241.8 | 0.91 |
| 3500/46M Hydro Monitor | 4 | Hydro turbine | 241.3 x 24.4 x 241.8 | 0.91 |
| 3500/50 Tachometer | 4 | Speed/Keyphasor | 241.3 x 24.4 x 241.8 | 0.91 |
Popular Bently Nevada Models
| Model | Function | Dimensions (mm) | Weight (kg) |
|---|---|---|---|
| 3500/22M Transient Data | Transient data interface | 241.3 x 24.4 x 241.8 | 0.91 |
| 3500/60 Temperature Monitor | Temperature monitoring | 241.3 x 24.4 x 241.8 | 0.91 |
| 3500/70M Overspeed Monitor | Overspeed detection | 241.3 x 24.4 x 241.8 | 0.91 |
| 3500/92 Communications | Communication gateway | 241.3 x 24.4 x 241.8 | 0.91 |
| 3500/25 Keyphasor Module | Shaft phase reference | 241.3 x 24.4 x 241.8 | 0.91 |
| 3500/15 Power Supply Module | Rack power supply | 241.3 x 24.4 x 241.8 | 0.91 |
