Product Overview
When roller element bearings fail unexpectedly, unplanned downtime can cripple production. The Bently Nevada 200157-03-05 Enveloping Trendmaster Pro accelerometer delivers precise vibration data to detect early signs of wear and cavitation effects, helping you avoid costly interruptions.
Technical Specifications Breakdown
This accelerometer provides a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, with a measurement range of ±245 m/s² (±25 g). Its frequency range spans 10 to 10,000 Hz (600 to 600,000 cpm), referenced to 80 Hz. The mounted resonant frequency exceeds 20 kHz (>1200 kcpm), ensuring reliable readings in demanding environments. Amplitude linearity holds within ±2% from 1 to 10 g pk, while transverse sensitivity stays at or below 7%. The settling time is ≤300 ms, and the excitation voltage ranges from 4.7 to 5.5 Vdc. Quiescent current is less than 800 µA, and output bias voltage is +2.5 ± 0.23 Vdc. The accelerometer operates from -40 ºC to +105 ºC (-40 ºF to +221 ºF) and withstands axial shock up to 49,050 m/s² pk (5,000 g pk). Hermetic sealing limits leakage to 5X10⁻⁸ atm•cc/s maximum. Physical dimensions are 17.5 mm x 45.7 mm (11/16 in x 1.8 in), with a typical weight of 58 g (2.0 oz). The mounting thread is 3/8-24 female, and recommended mounting torque is 2.7 to 6.8 N•m (2 to 5 ft•lbf). The sensing element is ceramic with a shear geometry, and the housing uses 316L stainless steel.
Industry Applications
This model is specifically designed for roller element bearing monitoring and detecting certain cavitation effects in rotating machinery. In applications like pumps, compressors, and turbines, the 200157-03-05 captures acceleration and velocity data using the ProTIM option with standard acceleration-to-velocity and acceleration enveloping channel type (-06). This capability allows maintenance teams to identify bearing degradation early and schedule repairs before catastrophic failure occurs.
Installation & Setup Guidance
Mount the accelerometer using the 3/8-24 female thread with a mounting torque between 2.7 and 6.8 N•m (2 to 5 ft•lbf). The mounting stud option 03 provides a 3/8-24 to 1/2-20 UNF 1-3/8 inch hex plate stud. Ensure the base-to-connector polarity is SIG+ positive with respect to SIG-. Apply a cure time of 24 hours after installation for optimal adhesion. For best results, mount on a clean, flat surface to maintain frequency response accuracy.
Maintenance & Reliability
Regularly inspect the accelerometer for physical damage or contamination. The hermetically sealed design (5X10⁻⁸ atm•cc/s maximum leakage) protects internal components from moisture and dust, enabling operation in 100% relative humidity (condensing, non-submerged). Verify output bias voltage remains within +2.5 ± 0.23 Vdc during routine checks. The 316L stainless steel housing resists corrosion, extending service life in harsh industrial settings.
Compatibility & Integration
The 200157-03-05 integrates with Bently Nevada monitoring systems that support acceleration enveloping channels. It is used with the ProTIM option and requires a 4.7 to 5.5 Vdc excitation source. The accelerometer features multiple approvals: CSA, ATEX, and IECEx (approval code 05), making it suitable for hazardous area installations. Confirm compatibility with your existing data acquisition hardware before ordering.
Selection Guide & Purchasing Advice
Before purchasing, verify that your application requires the acceleration enveloping channel type (-06) and the standard acceleration-to-velocity with acceleration option. The mounting stud option 03 is included; ensure your mounting surface accepts the 3/8-24 female thread. Contact SpareTechPLC to confirm current lifecycle status and availability, as this model may be subject to obsolescence. SpareTechPLC offers genuine Bently Nevada parts with fast shipping and expert support.
Frequently Asked Questions
Q1: What is the sensitivity of the 200157-03-05 accelerometer?
A: The sensitivity is 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, with a tolerance of ±12%.
Q2: Can this accelerometer be used in hazardous environments?
A: Yes, it has multiple approvals including CSA, ATEX, and IECEx (approval code 05), making it suitable for classified areas.
Q3: What is the maximum operating temperature?
A: The temperature range is -40 ºC to +105 ºC (-40 ºF to +221 ºF).
Q4: How long does it take for the accelerometer to settle after power-up?
A: The settling time is ≤300 ms (within 5% of bias).
Q5: What type of bearings does this accelerometer monitor?
A: It is designed for roller element bearings and certain cavitation effects in rotating machinery.
