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Technical specifications for 3500/50
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Manufacturer:Bently Nevada
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Product Category:Machinery Monitoring Systems
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Spare Part Number:3500/50
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Estimated shipping dimensions:2.6×25.8×24cm
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Weight:0.8 kg
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Tariff Code:8537101190
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Counliy of origin:USA
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Input:20 k Ω (standard)
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Impedance:40 kΩ (TMR)
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Power:5.8 Watts, typical
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Output Impedance:550 Ω
Information
Overview
Manuals
Common Applications
Product Precautions
The 3500/50 is a 2 channel module that accepts input from proximity probes or magnetic pickups to determine shaft rotative speed, rotor acceleration, or rotor direction. The module compares these measurements against user-programmable alarm setpoints and generates alarms when the setpoints are violated.
- Speed Monitoring, Setpoint Alarming and Speed Band Alarming
- Speed Monitoring, Setpoint Alarming and Zero Speed Notification
- Speed Monitoring, Setpoint Alarming and Rotor Acceleration Alarming
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Bently Nevada 3500/50 Tachometer Module, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Power Generation
Monitoring steam and gas turbine speeds to prevent overspeed events that could cause catastrophic failure. It also confirms rotors have reached the required speed for turning gear engagement.
Oil & Gas
Speed monitoring for centrifugal compressors. By measuring shaft speed, it helps identify potential surge conditions and ensures anti-surge valves actuate appropriately.
Chemical & Petrochemical
Monitoring large agitators or centrifuges. It ensures mixing speeds remain within process limits and prevents mechanical seal damage caused by unintentional reverse rotation.
Steel & Metallurgyy
Acceleration monitoring in blast furnace blowers. During start-up, it tracks rotor acceleration to ensure smooth passage through critical speeds without excessive vibration.
Pulp & Paper
Controlling paper machine dryer section roll speeds. It synchronizes the speed of roll sets to prevent sheet breaks caused by speed differentials.
The Bently Nevada 3500/50 Tachometer Module is a high-precision instrument designed for critical machinery protection across industries like power generation, oil and gas, and manufacturing. Its primary functions include monitoring shaft speed, rotor acceleration, and reverse rotation to prevent catastrophic mechanical failures. For successful implementation, users must ensure precise sensor configuration (such as pulse-per-revolution settings), maintain proper probe gap voltages, and employ rigorous shielding to mitigate electrical noise. Furthermore, always bypass interlocks before hot-swapping the module to avoid accidental machine trips, ensuring both operational safety and data integrity.
FAQ View All FAQ
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What is the 3500/33?It is a Tachometer Module, a core component of the 3500 system used to measure speed, phase, and torque of rotating machinery.
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How to use the 3500/50?Insert it into a 3500 rack slot, connect speed probes (such as eddy current or magnetic sensors), and configure gear teeth counts and alarm thresholds via software.
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What data does 3500/50 primarily monitor?It measures real-time speed, reverse rotation, overspeed protection, and zero speed (turning gear) status.
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Does 3500/50 provide alarm functions?Yes. It supports Alert and Danger setpoints, triggering relays for shutdown protection if the speed limits are exceeded.
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What probes must be used with the 3500/50?It is typically paired with 3300 XL 8mm eddy current probes or magnetic pickups.
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