177230-02-01-CN | Bently Nevada Seismic Transmitter 0-50.8 mm/s

Introduction: The Evolution of Vibration Monitoring

Over the past decades, industrial plants have shifted from reactive maintenance to predictive strategies. Vibration monitoring has become a cornerstone of this evolution, enabling early detection of mechanical faults. The 177230-02-01-CN from Bently Nevada represents a modern solution in this field. It is a seismic transmitter designed to convert vibration levels into a standard 4-20 mA signal. This allows seamless integration with existing control systems, providing continuous insight into machine health.

For engineers and maintenance teams, this transmitter offers a straightforward way to enhance reliability. Its robust construction and precise output make it suitable for demanding environments. By choosing the 177230-02-01-CN, you invest in a tool that supports operational excellence.

Key Features and Technical Specifications

The 177230-02-01-CN is engineered for accuracy and durability. Below are its core specifications, sourced directly from the manufacturer's data:

• Measurement Range: 0 – 50.8 mm/s (0 – 2.0 in/s) for velocity measurement.
• Frequency Response: 10 Hz to 1 kHz (600 to 60 kcps) RMS, covering typical machine vibration frequencies.
• Output Signal: 4-20 mA current loop, proportional to peak vibration levels.
• Full Scale Range: 01 - 25.4 mm/s (1.0 in/s) ± 10%.
• Sensitivity: 4 ± 0.3 mA equals 0.0 mm/s; 20 ± 2 mA equals full scale range.
• Excitation Voltage: 12 to 30 Vdc, current limited to 40 mA.
• Settling Time: Less than 15 seconds within 2% of final value.
• Mounted Resonant Frequency: Greater than 12 kHz.
• Transverse Sensitivity: Less than 5% of sensitivity.
• Sensing Element: Ceramic / Shear type.
• Operating Temperature: -40°C to +85°C (-40°F to +185°F).
• Relative Humidity: Up to 100% non-submerged.
• Case Material: 316L stainless steel.
• Connector: 3-pin MIL-C-5015, 316L stainless steel.
• Mounting Hole: 1/4-28 UNF; mounting threads M6 x 1 SI, M8 x 1.25 SI, ¼-28 UNF.
• Mounting Torque: 4 to 7 N-m (35.4 to 62.0 in-lbf).
• Weight: 0.131 kg (4.62 oz).
• Dimensions: Diameter 25.4 mm (1.00 in), Height 66.0 mm (2.60 in).

The transmitter's output is a 4-20 mA loop, which is widely accepted in PLC, DCS, and SCADA systems. This simplifies integration and reduces the need for additional signal conditioning.

Applications and Use Cases

The 177230-02-01-CN is suitable for monitoring rotating equipment such as pumps, fans, motors, and compressors. Its frequency response covers a wide range of machine speeds, making it versatile across industries. For example, in a manufacturing plant, this transmitter can be installed on a critical pump to provide continuous vibration data. This data helps detect imbalance, misalignment, or bearing wear early, preventing unplanned downtime.

Furthermore, the 4-20 mA output allows direct connection to existing control systems, enabling alarms and trend analysis. This capability supports condition-based maintenance programs, ultimately reducing maintenance costs and extending equipment life.

Installation and Setup

Proper installation is crucial for accurate vibration measurement. The 177230-02-01-CN features a 1/4-28 UNF mounting hole, and mounting threads are available in M6 x 1 SI, M8 x 1.25 SI, and ¼-28 UNF. Ensure the mounting surface is flat and clean to achieve a rigid connection. Apply the recommended mounting torque of 4 to 7 N-m (35.4 to 62.0 in-lbf) to avoid over-tightening, which could affect readings.

Wiring is straightforward with the 3-pin MIL-C-5015 connector. Pin A is the 4-20 mA positive loop, Pin B is the loop return, and Pin C provides a dynamic acceleration signal. Verify that the excitation voltage is within 12 to 30 Vdc and that the current is limited to 40 mA. Most PLC/DCS/SCADA internal power supplies are current-limited to 30-35 mA, which is compatible.

Maintenance and Reliability

The 177230-02-01-CN is designed for long-term reliability. Its 316L stainless steel case and connector resist corrosion, making it suitable for harsh environments. The hermetic sensor seal protects internal components from moisture and contaminants. To ensure consistent performance, inspect the transmitter periodically for physical damage or loose connections. Verify that the mounting remains secure and that the connector is clean and dry.

Given its rugged construction, the transmitter can withstand high humidity and temperature extremes. However, regular inspection per the manufacturer's guidelines is recommended to maintain accuracy.

Compatibility and Integration

This seismic transmitter is specifically designed for use with PLCs, DCS, and SCADA systems that have internal power supplies. Its 4-20 mA output is a universal analog signal, ensuring broad compatibility. The transmitter also provides a dynamic acceleration signal on Pin C, which can be used for additional analysis if the system supports it.

Because the output is proportional to peak vibration levels, it can be easily scaled in the control system to display velocity in mm/s or in/s. This simplifies setup and reduces engineering effort.

FAQ

What is the measurement range of the 177230-02-01-CN?

The measurement range is 0 – 50.8 mm/s (0 – 2.0 in/s).

What output signal does it provide?

It provides a 4-20 mA current loop signal proportional to peak vibration levels.

What is the operating temperature range?

The operating temperature range is -40°C to +85°C (-40°F to +185°F).

Is the transmitter suitable for high humidity environments?

Yes, it can operate in relative humidity up to 100% non-submerged.

Product Support and Availability

The 177230-02-01-CN is available through Petro Auto Tech. As a trusted supplier of industrial automation parts, Petro Auto Tech ensures prompt delivery and competitive pricing. Contact Petro Auto Tech for current availability and lifecycle status before ordering.