Introduction
When fin-fan or slow rotating shaft applications demand precise low-frequency vibration monitoring, the Bently Nevada 200155-09-05 Low Frequency Trendmaster Pro accelerometer delivers reliable performance. This sensor is engineered to capture acceleration data from 1.5 to 10,000 Hz, making it a critical component for predictive maintenance in industrial environments.
Technical Specifications Breakdown
The 200155-09-05 offers a sensitivity of 10.2 mV/(m/s2) at 80 Hz, providing clear signal output for trend analysis. Its measurement range spans ±196 m/s2 (±20 g), suitable for monitoring moderate vibration levels. The frequency response covers 1.5 to 10,000 Hz (90 to 600,000 cpm), ensuring low-frequency events are captured accurately. With a mounted resonant frequency above 20 kHz, the sensor avoids resonance interference in most applications. The accelerometer operates on an excitation voltage of 4.7 to 5.5 Vdc and draws a quiescent current of less than 800 µA, with an output bias voltage of +2.5 ± 0.23 Vdc.
Industry Applications
This accelerometer excels in monitoring slow rotating shafts found in cooling towers, fans, and pumps. Its low-frequency capability (down to 1.5 Hz) makes it ideal for detecting early bearing wear or imbalance in large, slow-speed machinery. The 200155-09-05 also suits fin-fan applications where vibration signatures change gradually, enabling condition-based maintenance scheduling.
Installation & Setup Guidance
Mount the 200155-09-05 using the 3/8-24 female thread with a mounting torque of 2.7 to 6.8 N•m (2 to 5 ft•lbf). The stud option 09 provides a 3/8-24 to 3/4 NPT adapter with a 1-1/4 inch hex stud for secure attachment. Ensure the mounting surface is clean and flat to achieve optimal coupling. After installation, allow a cure time of 24 hours at temperatures between -55 ºC and +121 ºC before taking critical measurements.
Maintenance & Reliability
With a hermetically sealed design (5X10-8 atm•cc/s maximum leak rate) and 316L stainless steel housing, the 200155-09-05 withstands harsh environments. Its temperature range of -40 ºC to +105 ºC and 100% relative humidity tolerance ensure reliable operation in outdoor or condensing conditions. Periodic inspection of the mounting integrity and cable connections helps maintain signal quality.
Compatibility & Integration
The 200155-09-05 is used with the ProTIM Option Low Frequency Acceleration-to-Velocity channel type (-05). It integrates into Bently Nevada monitoring systems for continuous vibration analysis. The sensor outputs a positive signal (SIG+ with respect to SIG-) when acceleration is applied from base to connector.
Selection Guide & Purchasing Advice
Before ordering, verify that your monitoring system supports the 200155-09-05's sensitivity and frequency range. The accelerometer includes multiple approvals (CSA, ATEX, and IECEx) for hazardous area installations. Contact SpareTechPLC to confirm availability and ensure the correct mounting stud option for your application.
Troubleshooting & Common Issues
If the output bias voltage deviates from the +2.5 ± 0.23 Vdc range, check the excitation voltage (4.7 to 5.5 Vdc) and verify the cable integrity. A settling time of up to 2000 ms may cause initial reading delays; allow the sensor to stabilize after power-up. For noisy signals, inspect the mounting torque and ensure the sensor is not over-tightened beyond 6.8 N•m.
Frequently Asked Questions
Q: What is the sensitivity of the 200155-09-05?
A: The sensitivity is 10.2 mV/(m/s2) at 80 Hz, with a tolerance of ±12%.
Q: Can this accelerometer be used in hazardous areas?
A: Yes, it has multiple approvals including CSA, ATEX, and IECEx for use in classified locations.
Q: What is the maximum shock the sensor can withstand?
A: The axial shock limit is 49,050 m/s2 pk (5,000 g pk).
Q: How long does it take for the sensor to settle after power-up?
A: The settling time is ≤2000 ms within 5% of the bias voltage.
Q: What mounting thread does the 200155-09-05 use?
A: It uses a 3/8-24 female thread, with a stud option for 3/8-24 to 3/4 NPT adapter.
