Product Overview
When roller element bearing failures or cavitation effects threaten rotating machinery, the Bently Nevada 200157-05-CN Enveloping Trendmaster Pro accelerometer delivers precise vibration data. This 200157-05-CN model is designed for use with ProTIM options, supporting standard acceleration-to-velocity with acceleration enveloping channel type (-06). Its ceramic shear sensing element and 316L stainless steel housing ensure durability in harsh industrial environments.
Technical Specifications Breakdown
The 200157-05-CN offers a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz with ±12% tolerance. This high sensitivity enables accurate detection of early-stage bearing defects. The measurement range spans ±245 m/s² (±25 g), suitable for monitoring moderate to high vibration levels. Frequency response covers 10 to 10,000 Hz (600 to 600,000 cpm), referenced to 80 Hz with ±10% tolerance, capturing both low-speed and high-speed machinery dynamics. Mounted resonant frequency exceeds 20 kHz, ensuring reliable operation across the entire measurement band. Amplitude linearity is within ±2% from 1 to 10 g peak, and transverse sensitivity is ≤7%, minimizing cross-axis errors.
Industry Applications
Roller element bearing monitoring is the primary application for this accelerometer. The enveloping channel type extracts bearing defect frequencies from background noise, enabling early fault detection. Cavitation effects in pumps and turbines also fall within its measurement capability. The 200157-05-CN operates across a temperature range of -40 ºC to +105 ºC (-40 ºF to +221 ºF), making it suitable for outdoor installations and process areas. Its hermetic sealing (5X10⁻⁸ atm•cc/s maximum) and 100% relative humidity tolerance allow use in condensing environments without submersion.
Installation & Setup Guidance
Mount the 200157-05-CN 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 mounting stud option 05 provides a 3/8-24 to 1/4-28 UNF 1-3/8 inch hex plate stud for flexible attachment. Allow 24 hours cure time after mounting. Ensure the excitation voltage is between 4.7 and 5.5 Vdc, and verify quiescent current is below 800 µA. The output bias voltage should read +2.5 ± 0.23 Vdc. Polarity is SIG+ positive with respect to SIG- for acceleration from base to connector.
Maintenance & Reliability
Regular inspection of the mounting integrity and cable connections helps maintain measurement accuracy. The accelerometer's 316L stainless steel housing resists corrosion, and its hermetic seal prevents moisture ingress. Axial shock limit of 49,050 m/s² pk (5,000 g pk) protects against impact events. The settling time within 5% of bias is ≤300 ms, allowing rapid recovery after power-up. Periodic calibration verification against the 80 Hz reference ensures long-term stability.
Compatibility & Integration
The 200157-05-CN works with Bently Nevada ProTIM systems that support acceleration enveloping channel type (-06). It provides standard acceleration-to-velocity conversion. The accelerometer outputs a signal proportional to vibration, which interfaces with monitoring modules for data acquisition and analysis. Verify compatibility with your existing Bently Nevada rack or standalone monitor before integration.
Selection Guide & Purchasing Advice
Before ordering the 200157-05-CN, confirm the mounting thread requirement (3/8-24 female) and stud option (05). The CN approval indicates country-specific certification. Contact SpareTechPLC to verify current lifecycle status and availability. SpareTechPLC stocks genuine Bently Nevada parts and can assist with replacement recommendations if this model is discontinued.
Frequently Asked Questions
Q: What is the sensitivity of the 200157-05-CN accelerometer?
A: The sensitivity is 10.2 mV/(m/s²) (100 mV/g) at 80 Hz with ±12% tolerance.
Q: What is the frequency range of this accelerometer?
A: The frequency range is 10 to 10,000 Hz (600 to 600,000 cpm), referenced to 80 Hz with ±10% tolerance.
Q: What type of applications is the 200157-05-CN designed for?
A: It is designed for roller element bearing monitoring and certain types of cavitation effects.
Q: What is the operating temperature range?
A: The temperature range is -40 ºC to +105 ºC (-40 ºF to +221 ºF).
Q: What is the mounting thread size and torque requirement?
A: The mounting thread is 3/8-24 female, and the mounting torque is 2.7 to 6.8 N•m (2 to 5 ft•lbf).
