Introduction
The 3500/33-01-00 is a specialized monitoring module designed to protect and monitor rotating machinery by measuring case (or structure) vibration and speed. It is a dual-channel module that accepts input from seismic transducers, such as velocity sensors (e.g., 330130-080-00) and optional keyphasor® probes. Its primary function is to continuously monitor the overall vibration levels of machine structures (like bearings and housings) in units of velocity (mm/s or in/s) and the rotational speed (RPM). It provides vital "Alert" and "Danger" alarms to prevent damage from mechanical faults like imbalance, misalignment, resonance, and bearing wear.
Technical Parameters
The following table summarizes the key technical specifications for the model 3500/33-01-00.
| Parameter Category | Specification Details |
|---|---|
| Model Number | 3500/33-01-00 |
| Product Type | Dual-Channel Seismic (Case Vibration) & Speed Monitor |
| Part of System | Bently Nevada 3500 Machinery Protection System |
| Input Channels | 2 independent channels |
| Compatible Transducers | • Velocity Seismic Transducers (e.g., 8 to 1000 mV/mm/s) • Optional Proximitor® for Keyphasor® input (for RPM and phase reference) |
| Dynamic Range | Vibration: Typically 0 to 100 mm/s (0 to 4 in/s) peak (user-configurable) |
| Frequency Range | Typically 4.5 Hz to 2000 Hz (270 to 120,000 CPM) |
| Alarm Settings | Two user-configurable levels per channel: "Alert" (Warning) and "Danger" (Shutdown) |
| Relay Outputs | Per channel: Two dedicated failsafe alarm relays (Alert & Danger). Relay logic is configurable (e.g., de-energize on alarm). |
| Power Supply | Powered by the 3500 system rack. |
| Isolation | Channel-to-channel and channel-to-ground isolation. |
| Display | Integral LCD for displaying bar graphs, values, and configuration. |
| Module Slots | Occupies a single slot in a 3500 series rack. |
| Operating Temperature | 0 to 65 °C (32 to 149 °F) |
| Dimensions (H x W x D) | Approx. 190 mm (H) x 55 mm (W) x 150 mm (D) (Standard 3500 module, 1-slot width) |
| Weight | Approx. 0.6 - 0.8 kg |
Critical Note: *The Bently Nevada 3500 system is a highly configurable safety system. The exact alarm setpoints, dynamic ranges, and relay configurations are set via specialized software. It is imperative to consult the official 3500/33 Configuration and Maintenance Guide for detailed specifications and safety procedures.*
Application Scenarios
This monitor is used for continuous, real-time protection of a wide range of industrial machinery where monitoring the health of the machine's structure is critical.
General Rotating Machinery Protection:
Motors, Pumps, and Fans: Continuously monitors bearing housing vibration to detect imbalances, misalignment, mechanical looseness, and rolling element bearing defects.
Turbomachinery Auxiliaries:
Protects critical support equipment such as gear boxes, boiler feed pumps, and large compressors that are essential to the operation of larger turbine-generator sets.
Industrial Fans and Blowers:
Ideal for monitoring fans in power plants, HVAC systems, and industrial processes, where blade-pass frequency and overall vibration can indicate buildup, imbalance, or other issues.
Machine Trains with Non-Rotating Elements:
Used on any machine where relative shaft displacement (measured by proximity probes) is less critical than the absolute motion of the machine's casing or structure.
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7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
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