Product Specification Document: Bently Nevada 1900/65A

1. Product Overview

2. Basic Product Information

Manufacturer and Model Identity

• Manufacturer: Bently Nevada, a Baker Hughes company

• Model Number: 1900/65A

• Product Series: 1900 Series

• Product Type: Standalone Multi‑Channel Machinery Monitor

• System Compatibility: 3300 XL proximity probes, 330400 accelerometers, 330500 velocity sensors, RTDs/thermocouples, Modbus‑enabled DCS/SCADA/PLC

• Country of Origin: United States

• Key Components: Main monitor (167699‑02), power supply module (172323‑01), user interface display

Electrical Characteristics

• Power Supply: 18–36 VDC (nominal 24 VDC); optional 110–220 VAC external power adapter

• Current Consumption: ~0.3 A @ 24 VDC

• Signal Processing: 24‑bit ADC per channel for high‑precision data acquisition

• Input Channels:

  • 4 × configurable transducer inputs (proximity, velocity, acceleration, Keyphasor)

  • 4 × temperature inputs (Type E/J/K/T thermocouples, 2/3‑wire RTDs)

• Outputs:

  • 6 × programmable relay outputs (NO/NC, 5 A @ 30 VDC)

  • 4 × isolated 4–20 mA analog recorder outputs

  • 1 × buffered transducer output (raw signal for external analysis)

• Communication: Modbus RTU (RS‑485) for data exchange with DCS/SCADA

Physical and Mechanical

• Enclosure: Rugged metal casing with conformal‑coated PCB; EMI‑shielded

• Dimensions: 196.9 mm × 149.4 mm × 74.4 mm (7.75 in × 5.88 in × 2.93 in)

• Net Weight: ~0.77 kg (1.7 lbs)

• Mounting: 35 mm DIN‑rail, panel/divider mount; optional NEMA 4X/IP66 fiberglass enclosure

• Terminations: Removable green screw terminals (12–22 AWG) for I/O and power

• User Interface: Integrated LCD display, LED status indicators, and tactile pushbuttons for local configuration and monitoring

Environmental Limits

• Operating Temperature: −20°C to +70°C (−4°F to +158°F)

• Storage Temperature: −30°C to +90°C (−22°F to +194°F)

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

• Vibration Resistance: 5 g (10 Hz–1 kHz); 10 g shock (11 ms half‑sine)

• Ingress Protection: IP20 (standard); IP66 (with optional enclosure)

Compliance and Certification

• Standards: API 670 (basic compliance), ISO 10816, IEC 61000‑6‑2/4 (EMC)

• Certifications: CE, cULus, ATEX (EN 60079‑0/15), RoHS, ABS marine approval

• Hazardous Area: Class I Zone 2/Div 2 (Groups A/B/C/D), T4 temperature class

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

• Lifecycle Status: Active production; supported for new installations and retrofits

3. Function and Product Positioning

Core Functions

• Multi‑Parameter Monitoring: Simultaneously measures radial vibration, axial thrust position, rotational speed/phase, and bearing/process temperature.

• Configurable Signal Processing: Each transducer input supports multiple sensor types with adjustable scale factors, filtering, and integration for custom measurement setups.

• Independent Alarm Logic: Per‑channel Alert and Danger setpoints with configurable hysteresis; six programmable relays for alarm, shutdown, or status indication.

• Diagnostics & Event Logging: Internal sensor/cable fault detection (OK check); 200‑entry event list with time stamps for troubleshooting and trend analysis.

• Data Integration: Modbus communication enables real‑time data sharing with plant control systems; 4–20 mA outputs connect to chart recorders or DCS analog inputs.

Operational Features

• Local Configuration: Onboard LCD and pushbuttons allow setup, tuning, and data viewing without a PC.

• Hot‑Swap Capability: Modules can be replaced without system shutdown (when wired appropriately).

• Sensor Interchangeability: Compatible with all Bently Nevada 3300 series sensors; supports third‑party sensors via custom configuration.

• Low Power Consumption: Efficient design reduces energy use and heat generation in panel enclosures.

Product Positioning

• Pumps, fans, blowers, compressors, and gearboxes in power, oil and gas, and petrochemical plants.

• Applications where full 3500‑series rack systems are unnecessary but API 670‑style protection is required.

• Retrofits of legacy 1900/55 monitors (direct replacement kit available).

• Marine and offshore installations (ABS certified).

4. Core Performance Parameters

Measurement Performance

• Transducer Inputs: 4 channels, configurable for proximity (8 mm/11 mm), velocity, acceleration, or Keyphasor.

• Temperature Inputs: 4 channels, Type E/J/K/T thermocouples (‑200°C to +1300°C) and 2/3‑wire RTDs (Pt100/Pt1000).

• Vibration Range: 0–10 kHz frequency response; 0–100 mm/s (peak) velocity, 0–10 g acceleration, 0–2.3 mm proximity gap.

• Accuracy: ±0.1% of full scale (transducer); ±0.5°C (temperature)

• Repeatability: ±0.05% of full scale

Output Performance

• Relay Ratings: 5 A @ 30 VDC, NO/NC configurable; programmable for Alert/Danger/OK status.

• Analog Outputs: 4–20 mA, isolated, ±0.1% accuracy, 500 Ω maximum load.

• Communication: Modbus RTU, RS‑485, 9.6–115.2 kbps; supports up to 247 slave addresses.

Reliability

• MTBF: >150,000 hours (25°C, continuous operation)

• Warranty: 1 year factory warranty; extended warranties available

• Maintenance: No scheduled maintenance; annual calibration verification recommended

• Data Retention: Configuration and event logs stored in non‑volatile memory (no battery required)

5. General Matching Accessories

Installation & Mounting

• 35 mm DIN‑rail mounting kit (standard)

• Panel‑mount adapter plate

• NEMA 4X/IP66 fiberglass enclosure (weatherproof)

• Replacement LCD display module

• Terminal block replacement kit

System Compatibility

• 3300 XL 8 mm proximity probes (330101 series)

• 330400 accelerometers, 330500 velocity sensors

• Type K thermocouples, Pt100 RTDs

• Modbus‑enabled DCS/SCADA/PLC systems

• 1900/55 retrofit kit (direct drop‑in replacement)

Maintenance & Spares

• Configuration software (1900 Configuration Tool, free download)

• Buffered output cable (for external vibration analysis)

• Calibration verification kit

• Factory test and calibration report (included with unit)

Documentation

• 1900/65A Datasheet and Installation Manual

• 1900 Series Application Guide

• Modbus Communication Protocol Manual

• API 670 Compliance Guide for Auxiliary Machinery

6. Applicable Equipment and Industry Fields

Primary Applications

• Power Generation: Pumps, fans, blowers, and auxiliary compressors in thermal, combined‑cycle, and nuclear power plants.

• Oil and Gas: Offshore platform pumps, refinery blowers, and gas plant compressors.

• Petrochemical: Process pumps, gearboxes, and cooling tower fans in chemical plants.

Secondary Applications

• Water/Wastewater: Large supply pumps, aeration blowers, and sludge digester agitators.

• Pulp and Paper: Paper machine drive motors, large fans, and stock pumps.

• Marine/Offshore: Vessel propulsion machinery, cargo pumps, and HVAC blowers (ABS certified).

Compatibility Notes

• Sensor Limitation: Not compatible with older non‑XL 3300 series proximity probes; requires 3300 XL sensors.

• Hazardous Area: For Class I Div 1 installations, use approved safety barriers between sensors and monitor.

• Power Polarity: Incorrect DC polarity will damage the unit; verify wiring before power‑up.

• Modbus Addressing: Each 1900/65A requires a unique Modbus slave address on the RS‑485 network.