Product Specification Document: Bently Nevada 3500/44-01-00

1. Product Overview

2. Basic Product Information

Manufacturer and Model Identity

• Manufacturer: Bently Nevada (Baker Hughes)

• Product Series: 3500 Machinery Protection System

• Model Number: 3500/44-01-00 (Alternative Part Numbers: 126623-01, 140734-03)

• Product Type: 4‑Channel Aeroderivative GT Vibration Monitor

• System Compatibility: 3500 Rack System; 3500/22M TDI Module; System 1 Software; Velomitor/accelerometer sensors

• Country of Origin: United States

Electrical Characteristics

• Power Supply: +24 V DC from 3500 rack backplane

• Power Consumption: ≤5.5 W (maximum)

• Sensor Inputs: 4 channels for Velomitor (velocity) or accelerometer (acceleration) signals

• Input Frequency Range: 10 Hz to 20 kHz

• Measurement Ranges: Vibration (0.0001–1000 μm RMS); Acceleration (0–10 g peak)

• Signal Resolution: 24‑bit analog‑to‑digital conversion

• Analog Outputs: 4 × 4–20 mA (retransmit); 1 × buffered vibration output

• Relay Outputs: 6 configurable relays (Alert/Danger; 5 A @ 30 V DC)

Physical and Mechanical

• Enclosure: Heavy‑duty metal, EMI‑shielded, conformal‑coated PCB

• Dimensions: 241.3 mm × 24.4 mm × 241.8 mm (9.50 in × 0.96 in × 9.52 in)

• Net Weight: ~0.91 kg (2.0 lb)

• Rack Slot: Full‑height, single‑slot; installs in any 3500 rack monitor slot

• Front Panel Indicators: Four channel status LEDs; module fault LED; power LED

• Enclosure Rating: IP20 (indoor use; finger‑contact protected)

Compliance and Certification

• Standards: API 670 (4th edition), ISO 10816, IEC 61000‑6‑2, IEC 61000‑6‑4

• EMC: CE marked; enhanced RFI/EMI immunity for industrial noise

• Environmental: RoHS compliant; halogen‑free materials

• Certifications: cULus, ATEX/IECEx (optional), CSA; SIL 2 capable

• Quality: ISO 9001 manufacturing; 100% factory tested and calibrated

3. Function and Product Positioning

Core Functions

• High‑Frequency Vibration Monitoring: Processes velocity/acceleration signals from gas turbine bearings and casings, measuring 1X synchronous vibration and broadband vibration for fault detection (imbalance, bearing wear, blade pass issues).

• Dual Tracking Filters: Each channel pair supports independent tracking filters synchronized to Keyphasor inputs, enabling precise 1X vibration tracking across varying turbine speeds.

• Configurable Alarm Logic: Per‑channel Alert/Danger setpoints with voting logic (AND/OR) for alarm annunciation or ESD triggering via 3500/32M relay modules.

• Transient Data Capture: Works with 3500/22M to acquire high‑resolution vibration waveforms for post‑fault diagnostics and root‑cause analysis.

• Sensor Diagnostics: Continuous monitoring of sensor health (open/short circuit, signal overload) with fault reporting to the 3500 system.

Operational Features

• Internal Terminations: Integrated I/O terminations eliminate external wiring modules, reducing installation complexity.

• Software‑Configurable: All settings (filter frequencies, alarm thresholds, Keyphasor assignments) programmed via 3500 Rack Configuration Software.

• Hot‑Swappable: Supports replacement without rack shutdown, minimizing maintenance downtime.

• High‑Speed Signal Processing: Optimized for aeroderivative turbine speeds (10,000–50,000 RPM) and high‑frequency vibration components.

Product Positioning

• OEM‑compliant monitoring for Baker Hughes, Rolls‑Royce, and Pratt & Whitney aeroderivative turbines

• High‑frequency vibration diagnostics for compact, high‑speed gas turbine packages

• API 670‑compliant protection systems for power generation and oil/gas applications

• Retrofit projects replacing legacy 3300 series aeroderivative monitors

4. Core Performance Parameters

Measurement Performance

• Number of Channels: 4 independent vibration channels

• Sensor Compatibility: Velomitor (velocity, 0.1–10 kHz); Accelerometer (acceleration, 1–20 kHz)

• Vibration Accuracy: ±0.02% of reading + 1 μm RMS (25°C)

• Filter Types: 1X tracking filter (per channel pair); band‑pass filter (10 Hz–20 kHz)

• Keyphasor Inputs: Up to 4 (rack‑wide) for speed synchronization

Communication and Outputs

• Backplane Communication: 3500 high‑speed proprietary bus (to TDI module)

• Analog Outputs: 4 × 4–20 mA (0–100% of set range); 1 × buffered vibration output

• Relay Outputs: 6 SPDT relays (Alert/Danger/Fault); 5 A @ 30 V DC (resistive)

• Data Formats: Vibration amplitude (RMS/peak); 1X phase; waveform data; fault logs

Environmental Limits

• Operating Temperature: −40°C to +70°C (−40°F to +158°F)

• Storage Temperature: −55°C to +85°C (−67°F to +185°F)

• Relative Humidity: 5%–95% RH (non‑condensing)

• Vibration Resistance: 25 g (5 Hz–2 kHz); 50 g shock (11 ms half‑sine)

• EMI Immunity: >60 dB attenuation (1 MHz–1 GHz), meeting IEC 61000‑6‑2

Reliability

• MTBF: >200,000 hours (25°C, full load)

• Warranty: 1 year (standard); extended warranties available

• Lifecycle Status: Active production (fully supported for new and retrofit projects)

5. General Matching Accessories

Installation and Mounting

• 3500 rack mounting hardware (standard with rack)

• Front panel key lock (security for configuration access)

• Shielded sensor cables (for Velomitor/accelerometer connections)

• Cable glands (EMI‑shielded for external wiring)

System Compatibility

• 3500/22M TDI Module (required for configuration/data transfer)

• 3500/15 Power Supply Module (rack power)

• 3500/32M Relay Output Module (alarm/ESD interfacing)

• System 1 Machinery Management Software (v4.0+)

• 3500 Rack Configuration Software

Maintenance and Spares

• Replacement front panel LEDs and indicators

• Conformal coating touch‑up kit (PCB protection)

• Firmware update kit (via TDI module)

• Annual calibration verification certificate

Documentation and Software

• 3500/44-01-00 datasheet and installation manual

• 3500 Aeroderivative Turbine Monitoring Application Note

• 3500 Rack System Planning Guide

• Factory test and calibration report (included with unit)

6. Applicable Equipment and Industry Fields

Primary Applications

• Power Generation: Aeroderivative gas turbines (e.g., LM2500, LM6000, GT13E2) in combined‑cycle, peaking, and distributed power plants.

• Oil and Gas: Gas turbine‑driven compressors, turboexpanders, and power generators in refineries, LNG facilities, and offshore platforms.

• Aerospace & Industrial: High‑speed gas turbine packages for industrial cogeneration and mechanical drive applications.

Secondary Applications

• Heavy Industry: High‑speed rotating machinery (e.g., turbochargers, high‑speed compressors) requiring broadband vibration analysis.

• Marine: Shipboard gas turbine propulsion systems for vibration monitoring and protection.

Compatibility Notes

• Aeroderivative‑Only: Optimized for high‑speed gas turbines; not intended for heavy‑frame turbines or slow‑speed machinery.

• Sensor Specificity: Requires Velomitor or accelerometer sensors; incompatible with standard proximity probes (use 3500/40M/42M for proximity inputs).

• TDI Dependent: Full waveform data and configuration require a 3500/22M TDI module in the same rack.