177230-02-02-05 | Bently Nevada Seismic Transmitter

Why Choose the Bently Nevada 177230-02-02-05?

When rotating machinery vibrates beyond safe limits, unplanned downtime and equipment damage can follow. The 177230-02-02-05 from Bently Nevada provides a dependable solution by converting vibration into a standard 4-20 mA current loop signal. This seismic transmitter is engineered for continuous operation in demanding conditions, helping you protect critical assets and reduce maintenance costs.

Key Features and Technical Specifications

• Measurement Range: 0 – 50.8 mm/s (0 – 2.0 in/s) peak, covering a wide spectrum of vibration levels.
• Frequency Response: 3 Hz to 1 kHz (180 to 60 kcpm) peak, with ±10% accuracy for precise monitoring.
• Output Signal: 4-20 mA current loop from Pin A to Pin B, proportional to peak vibration.
• 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, compatible with PLC, DCS, and SCADA systems.
• 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 for reliable performance.
• Operating Temperature: -40°C to +85°C (-40°F to +185°F).
• Relative Humidity: To 100% non-submerged.
• Shock Survivability: 9.810 m/s² (1.000 g peak) maximum drop test.
• Electrical Isolation: Greater than 10⁸ ohms; isolation breakdown voltage 600 Vrms with less than 1 mA leakage.
• Magnetic Field Sensitivity: Less than 20 μm/s/gauss (790 μin/s/gauss) peak; less than 14.7 mm/s²/gauss (150 μg/gauss) peak.
• Case Material: 316L stainless steel for corrosion resistance.
• 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, or ¼-28 UNF.
• Mounting Torque: 4 to 7 N-m (35.4 to 62.0 in-lbf).
• Weight: 131 g (4.62 oz) typical.
• Approvals: Multiple Approvals (CSA/NRTL/C, ATEX/IECEx).

Applications and Use Cases

This seismic transmitter is ideal for monitoring vibration on pumps, fans, motors, and other rotating equipment. In petrochemical plants, power generation facilities, and water treatment systems, the 177230-02-02-05 provides continuous data to control systems, enabling early detection of bearing wear or imbalance. Its rugged design and wide operating temperature range make it suitable for outdoor and hazardous environments. Furthermore, the 4-20 mA output simplifies integration with existing automation infrastructure, reducing installation complexity.

Installation and Setup

Mount the transmitter securely using the ¼-28 UNF hole or one of the available mounting threads. Apply the recommended mounting torque of 4 to 7 N-m to ensure proper coupling. Connect Pin A to the positive loop and Pin B to the loop return; Pin C provides an unbuffered dynamic acceleration signal. Verify that the excitation voltage is within 12 to 30 Vdc and that the power supply is current-limited to 40 mA. After installation, allow the transmitter to settle for at least 15 seconds before taking measurements.

Maintenance and Reliability

Because the sensor is hermetically sealed, the 177230-02-02-05 requires minimal maintenance. Periodically inspect the mounting integrity and connector condition to ensure reliable operation. The 316L stainless steel case withstands harsh chemicals and moisture, and the transmitter can operate in up to 100% relative humidity (non-submerged). With proper installation, this device offers long-term stability and reduced downtime, contributing to lower total cost of ownership.

Compatibility and Integration

This transmitter is designed for use with PLCs, DCS, and SCADA systems that have internal power supplies typically current-limited in the range of 30 mA to 35 mA. The 4-20 mA output is universally accepted by most industrial controllers, making integration straightforward. For dynamic analysis, the unbuffered acceleration signal on Pin C can be connected to a data collector or diagnostic system.

Troubleshooting and Common Issues

If the output signal is not within the expected 4-20 mA range, first verify the excitation voltage and loop wiring. Check that the mounting torque is correct and that the sensor is firmly attached. If the signal is noisy, ensure that the cable is properly shielded and that the connector is clean. For persistent issues, consult the official Bently Nevada documentation or contact Petro Auto Tech for technical support.

Frequently Asked Questions

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

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

Q: What output signal does this transmitter provide?

A: It provides a 4-20 mA current loop output, proportional to peak vibration.

Q: Can the 177230-02-02-05 be used in hazardous areas?

A: Yes, it has multiple approvals including CSA/NRTL/C and ATEX/IECEx.

Q: What is the operating temperature range?

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

Q: How is the transmitter mounted?

A: It can be mounted using the ¼-28 UNF hole or M6 x 1, M8 x 1.25, or ¼-28 UNF threads, with a recommended torque of 4 to 7 N-m.

Product Support and Availability

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