Product Overview
When monitoring slow rotating shafts or fin-fan applications, the Bently Nevada 200155-07-05 Low Frequency Trendmaster Pro accelerometer delivers reliable vibration data. This accelerometer is part of the Trendmaster Pro family, engineered for low-frequency measurements with high accuracy. It is made in the U.S.A. and features a ceramic shear sensing element for consistent performance.
Technical Specifications Breakdown
The 200155-07-05 offers a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, with a measurement range of ±196 m/s² (±20 g). Its frequency range spans 1.5 to 10,000 Hz (90 to 600,000 cpm), making it suitable for low-speed machinery. The mounted resonant frequency exceeds 20 kHz, ensuring minimal interference. Amplitude linearity is ±2% from 1 to 10 g pk, and transverse sensitivity is ≤7%. Settling time is ≤2000 ms, with excitation voltage of 4.7 to 5.5 Vdc and quiescent current <800 µA. Output bias voltage is +2.5 ± 0.23 Vdc.
Industry Applications
This accelerometer excels in monitoring fin-fan cooling towers and slow rotating shafts, where standard sensors may fail. For example, in a fin-fan application, the 200155-07-05 captures low-frequency vibrations from 1.5 Hz upward, helping detect imbalance or bearing wear early. Its robust sealing (5x10⁻⁸ atm·cc/s) and temperature range (-40 °C to +105 °C) suit harsh outdoor environments.
Installation & Setup Guidance
Mount the 200155-07-05 using the 3/8-24 female thread with a torque of 2.7 to 6.8 N·m (2 to 5 ft·lbf). The mounting stud option 07 provides a 3/8-24 to 3/8 NPT adapter with a 3/4 inch hex stud. Ensure the base is clean and flat for optimal coupling. After mounting, allow a 24-hour cure time for the adhesive if used. Connect the SIG+ and SIG- leads, verifying polarity: acceleration from base to connector produces SIG+ positive relative to SIG-.
Maintenance & Reliability
Periodically inspect the accelerometer for physical damage or corrosion, especially in condensing humidity environments. The 316L stainless steel housing and hermetic sealing ensure longevity. Check cable integrity and connector tightness during routine maintenance. The ceramic shear element is durable, but avoid exceeding the axial shock limit of 49,050 m/s² pk (5,000 g pk).
Compatibility & Integration
The 200155-07-05 is designed for use with the ProTIM option Low Frequency Acceleration-to-Velocity channel type (-05). It integrates seamlessly with Bently Nevada monitoring systems. For comparison, other accelerometers in the series may offer higher frequency ranges but lack the low-frequency optimization for slow rotating shafts.
Selection Guide & Purchasing Advice
Before purchasing, verify that your monitoring system supports the 200155-07-05's excitation voltage (4.7 to 5.5 Vdc) and output bias. The multiple approvals (CSA, ATEX, IECEx) ensure global compliance. SpareTechPLC offers this accelerometer with fast shipping and expert support. Compare with similar models: the 200155-07-05 provides a measurement range of 24.5 mm/s² (2.5 mg) for low-level vibrations, while other versions may target higher g ranges.
Frequently Asked Questions
Q1: What is the typical settling time for the 200155-07-05?
A1: The settling time is ≤2000 ms (within 5% of bias).
Q2: Can this accelerometer be used in high-humidity environments?
A2: Yes, it operates in 100% relative humidity, condensing, non-submerged conditions.
Q3: What mounting thread does the 200155-07-05 use?
A3: It uses a 3/8-24 female thread with a mounting torque of 2.7 to 6.8 N·m.
Q4: What is the frequency range for low-frequency monitoring?
A4: The frequency range is 1.5 to 10,000 Hz (90 to 600,000 cpm).
Q5: Is the 200155-07-05 suitable for fin-fan applications?
A5: Yes, it is specifically designed for fin-fan and slow rotating shaft applications.
