177230-02-02-05 | Bently Nevada Seismic Transmitter 0-50.8 mm/s

Introduction to the Bently Nevada 177230-02-02-05

When machinery vibration threatens uptime, the 177230-02-02-05 from Bently Nevada provides a dependable measurement solution. This seismic transmitter converts dynamic vibration into a standard 4-20 mA signal, making it ideal for integration with PLCs, DCS, and SCADA systems. Its robust design ensures accurate readings even in harsh industrial settings.

Key Features and Technical Specifications

The 177230-02-02-05 is engineered for precision and durability. Below are the core specifications:

• Measurement range: 0 to 50.8 mm/s (0 to 2.0 in/s) peak
• Frequency response: 3 Hz to 1 kHz (180 to 60 kcpm) ±10%
• Output signal: 4-20 mA current loop (Pin A to Pin B)
• Sensitivity (main loop): 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)
• 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
• Weight: 131 g (4.62 oz) typical

These specifications ensure accurate vibration monitoring across a wide range of rotating equipment, from pumps to turbines.

Why Choose the 177230-02-02-05 for Your Vibration Monitoring?

Investing in the 177230-02-02-05 offers long-term value. Its hermetically sealed sensor and 316L stainless steel construction resist corrosion and moisture, reducing the need for frequent replacements. The 4-20 mA output simplifies integration with existing control systems, minimizing retrofit costs. With a settling time of less than 15 seconds within 2% of final value, you get fast, reliable readings that help prevent costly downtime.

Applications and Use Cases

This seismic transmitter is suitable for monitoring vibration on fans, motors, gearboxes, and other rotating machinery. In continuous process industries, it provides early warning of bearing wear or imbalance, allowing maintenance teams to act before failure occurs. For example, in a petrochemical plant, the 177230-02-02-05 can be installed on critical pumps to track vibration trends, supporting predictive maintenance strategies.

Installation and Setup

Mounting the 177230-02-02-05 is straightforward. Use the 1/4-28 UNF mounting hole or the provided M6 x 1 SI, M8 x 1.25 SI, or ¼-28 UNF threads. Apply a mounting torque of 4 to 7 N-m (35.4 to 62.0 in-lbf) to ensure a secure fit. Connect Pin A to the 4-20 mA positive loop and Pin B to the loop return; Pin C provides an unbuffered dynamic acceleration signal referenced to Pin B. Ensure the excitation voltage is within 12 to 30 Vdc, with current limited to 40 mA.

Maintenance and Reliability

Routine inspection is essential to maintain performance. Periodically check the connector for corrosion or damage, and verify that the mounting remains tight. The hermetically sealed design protects the sensing element from moisture, but avoid submerging the transmitter. With proper care, the 177230-02-02-05 delivers years of reliable service, reducing total cost of ownership.

Compatibility and Integration

The 177230-02-02-05 is designed for use with PLCs, DCS, and SCADA systems that have internal power supplies typically current-limited to 30-35 mA. Its 4-20 mA output is universally accepted, making integration straightforward. The dynamic acceleration signal on Pin C can be used for additional analysis if your system supports it.

Frequently Asked Questions

Q: What is the measurement range of the 177230-02-02-05?

A: The measurement range is 0 to 50.8 mm/s (0 to 2.0 in/s) peak.

Q: What power supply is required?

A: Excitation voltage is 12 to 30 Vdc, with current limited to 40 mA.

Q: Can the transmitter be used in high-humidity environments?

A: Yes, it operates in relative humidity up to 100% non-submerged.

Q: What is the output signal?

A: The output is a 4-20 mA current loop from Pin A to Pin B, proportional to peak vibration.

Q: What mounting options are available?

A: Mounting hole is 1/4-28 UNF, and mounting threads include M6 x 1 SI, M8 x 1.25 SI, and ¼-28 UNF.

Product Support and Availability

The 177230-02-02-05 is available through Petro Auto Tech. Contact our team for current availability and lead times. We are ready to assist with your vibration monitoring needs.