Details

The GE Bently Nevada 177230 Seismic Transducer provides a 4-20 mA signal proportional to the 0-1 inch/sec. 0-pk velocity movement of a bearing housing or machinery enclosure. It is designed for use in non-critical machines.

The transducer automatically integrates the acceleration signal in the machine into vibration before sending the signal to the controller. The seismic transducer also has a dynamic acceleration waveform output for advanced diagnostics that is accessible at the non-sensor end of the field wiring through a connection panel or some other wiring technique.

Features

• Part Number: 177230-02
• Manufactured by GE Bently Nevada
• Easy implementation and use
• Interfaces with PLCs and control systems (such as DCS and SCADA)
• Provides a quick learning curve for operations and maintenance
• Requires no field configuration or adjustments
• Needs few additional parts for a complete system
• Includes self-test
• Incorporates a protected interface
• Supports a variety of interface cables

Data Quality

• Provides accurate and repeatable data
• Uses a simple data format
• Provides raw vibration signal for verification and analysis

Safety & Ergonomics

• Compatible with EHS
• Implements a safe and ergonomic design
• Supports access to hazardous areas
• Incorporates a robust CM design for reliability
• Implements standard 4 to 20mA emitter of the industry

Applications

When integrated into the PLC or control system of a comprehensive plant asset condition monitoring solution, the transducer will help users better manage downtime, optimize maintenance planning, and prevent unforeseen catastrophic failures of machinery assets.

GE Bently Nevada 177230 Seismic Transducer Specifications

Electrical

• Sensitivity - Main Loop (Signal One) 0,0 to 25,4 mm/s (0 to 1,0 in/s) ± 10%, rms bandwidth
• Output Format, Pin A Referenced to Pin B: 4 to 20 mA Current Loop Vibration Velocity
• Excitation Voltage: 12 to 30 Vdc (current limited to 40 mA). Note: This product is for use with PLC, DCS and SCADA systems that have an internal power supply which is typically limited in the range of 30 mA to 35 mA
• Placement Time: Less than 15 seconds within 2% of final value
• Connector Circuit Connection Pin A: 4-20 mA Positive Loop
• Pin B: 4-20 mA Negative Loop and common for Dynamic Signal
• Pin C: Dynamic Signal in Voltage, Unbuffered
• Frequency Response: 10 Hz to 1 kHz (600 cpm to 60 kcpm) ± 10%
• Sensitivity - Dynamic Signal: 10,2 mV/m/s² (100 mV/g) ± 5%
• Output Format, Pin C Referenced to Pin B: Voltage, Vibration Acceleration. Note: The negative of the dynamic signal (Pin B) requires isolation from any ground connections. If this terminal is grounded, the 4-20 mA loop will be shorted, resulting in no output
• Frequency Response: 2,5 Hz to 10 kHz (150 cpm to 600 kcpm) ± 10%
• Linearity: ± 1%
• Output Bias Referenced to Pin B: 2,5 V ± 0,1 V
• Full Range: 196 m/s² (20 g's) peak
• Velocity Range: 420 mm/s (16,5 in/s) peak
• Mounted Resonance Frequency: More than 12 kHz
• Cross Sensitivity: Less than 5% of sensitivity
• Sensor Element Type: Ceramic / Shear

Environmental Limits

• Operating Temperature Range: -40 °C to +85 °C (-40 °F to +185 °F)
• Electrical Insulation: Superior to 10⁸ ohms
• Insulation Breakdown Voltage: 600 Vrms with leakage current less than 1 mA
• Shock Survival: 9,810 m/s² (peak of 1.000 g), maximum drop test
• Magnetic Field Sensitivity: Less than 20 ¼ m/s / gauss (790 ¼ in/s / gauss) peak
• Less than 14,7 mm/s² / gauss (150 ¼ g / gauss) peak

Physical

• Enclosure Material: Stainless Steel 304L
• 3-pole MIL-C-5015 Connector, stainless steel
• Mounting Hole in Body: 1/4-28 UNF
• Mounting Threads: 3/8-24 UNF
• 1/4-18 NPT
• 1/4-28 UNF
• Connector Circuit Connection Pin A: 4-20 mA Loop Power (Positive with reference to Pin B)
• Pin B: 4-20 mA loop return (negative / return for dynamic signal)
• Pin C: Dynamic Signal (unbuffered, with reference to pin B)