Introduction
When roller element bearings begin to fail or cavitation effects threaten rotating machinery, the Bently Nevada 200157-16-05 Enveloping Trendmaster Pro accelerometer provides early detection. This sensor delivers precise vibration data to help maintenance teams prevent unplanned downtime and extend equipment life.
Technical Specifications Breakdown
The 200157-16-05 offers a sensitivity of 10.2 mV/(m/s2) (100 mV/g) at 80 Hz with a ±12% tolerance. Its measurement range spans ±245 m/s2 (±25 g), covering most industrial vibration levels. The frequency range extends from 10 to 10,000 Hz (600 to 600,000 cpm), ideal for monitoring rolling element bearings and cavitation. Mounted resonant frequency exceeds 20 kHz (>1200 kcpm), ensuring accurate readings across the operating band. Amplitude linearity stays within ±2% from 1 to 10 g peak, and transverse sensitivity remains ≤7%.
Electrical specifications include an excitation voltage of 4.7 to 5.5 Vdc, quiescent current below 800 µA, and an output bias voltage of +2.5 ± 0.23 Vdc. The accelerometer settling time is ≤300 ms. Environmentally, the unit withstands axial shock up to 49,050 m/s2 pk (5,000 g pk) and operates from -40 ºC to +105 ºC (-40 ºF to +221 ºF). Sealing is hermetic at 5X10-8 atm•cc/s maximum, and it handles 100% relative humidity (condensing, non-submerged).
Industry Applications
This accelerometer excels in two primary areas:
- Roller Element Bearing Monitoring: The enveloping channel type (-06) and acceleration-to-velocity conversion detect early bearing defects before catastrophic failure.
- Cavitation Detection: In pumps and turbines, the sensor identifies cavitation effects that degrade performance and cause erosion.
Compared to standard accelerometers, the 200157-16-05's enveloping capability enhances sensitivity to high-frequency impacts typical of bearing faults. For example, a standard sensor might miss subtle spalling signals, while this model captures them reliably.
Installation & Setup Guidance
Mount the 200157-16-05 using its 3/8-24 female thread. Apply a mounting torque of 2.7 to 6.8 N•m (2 to 5 ft•lbf). The mounting stud option (16 3/8-24 to 1/2-13 UNC, 3/4 inch hex stud) provides flexibility for different machine interfaces. Ensure the mounting surface is clean and flat to achieve the specified frequency response. Allow 24 hours cure time for any adhesive used. Connect SIG+ positive with respect to SIG- for proper polarity.
Maintenance & Reliability
Regularly inspect the accelerometer for physical damage or corrosion. The 316L stainless steel housing and connector material resist harsh environments. Check cable integrity and connector tightness. Verify output bias voltage remains within +2.5 ± 0.23 Vdc during operation. Periodic calibration checks ensure sensitivity stays within ±12% of 10.2 mV/(m/s2). Following these steps maximizes sensor lifespan and data accuracy, reducing overall maintenance costs.
Compatibility & Integration
The 200157-16-05 works with Bently Nevada ProTIM systems using the Standard Acceleration-to-Velocity with Acceleration Enveloping channel type. It integrates into existing vibration monitoring networks without additional signal conditioning. The multiple approvals (CSA, ATEX, and IECEx) allow installation in hazardous areas globally.
Selection Guide & Purchasing Advice
Before ordering, verify the mounting thread compatibility with your machine. Confirm the excitation voltage (4.7 to 5.5 Vdc) matches your system. Ensure the frequency range (10 to 10,000 Hz) covers your target fault frequencies. SpareTechPLC stocks the Bently Nevada 200157-16-05 Enveloping Trendmaster Pro accelerometer with fast shipping and expert support.
Frequently Asked Questions
Q: What is the sensitivity of the 200157-16-05?
A: The sensitivity is 10.2 mV/(m/s2) (100 mV/g) at 80 Hz, with a ±12% tolerance.
Q: What is the operating temperature range?
A: It operates from -40 ºC to +105 ºC (-40 ºF to +221 ºF).
Q: What approvals does this accelerometer have?
A: It carries multiple approvals: CSA, ATEX, and IECEx.
Q: What is the mounting thread size?
A: The mounting thread is 3/8-24 female, with an optional stud adapter.
Q: How does the enveloping channel type help?
A: The enveloping channel type (-06) enhances detection of high-frequency impacts from roller element bearing defects and cavitation.
