Introduction
In the evolving landscape of industrial automation, the need for precise vibration monitoring on slow rotating machinery has become critical. The Bently Nevada 200155-02-05 Low Frequency Trendmaster Pro Accelerometer addresses this challenge, providing reliable data for asset health management.
Product Overview
The Bently Nevada 200155-02-05 is a Low Frequency Trendmaster Pro Accelerometer, part of the trusted 200155 series. It is specifically engineered for applications like fin-fan and slow rotating shafts, where traditional accelerometers may fall short. With multiple approvals (CSA, ATEX, and IECEx), it meets rigorous safety standards for hazardous environments.
Technical Specifications Breakdown
Key specifications from the 200155-02-05 include:
- Sensitivity: 10.2 mV/(m/s2) (100 mV/g) at 80 Hz, with ±12% tolerance, ensuring accurate low-frequency measurements.
- Frequency Range: 1.5 to 10,000 Hz (90 to 600,000 cpm), referenced to 80 Hz with ±10% tolerance, covering slow to moderate speed machinery.
- Measurement Range: ±196 m/s2 (±20 g) for the accelerometer, with a low-range option of 24.5 mm/s2 (2.5 mg) for fine vibration detection.
- Excitation Voltage: 4.7 to 5.5 Vdc, compatible with standard power supplies.
- Output Bias Voltage: +2.5 ± 0.23 Vdc, providing a stable baseline for signal processing.
- Temperature Range: -40 ºC to +105 ºC (-40 ºF to +221 ºF), suitable for harsh industrial environments.
- Axial Shock Limit: 49,050 m/s2 pk (5,000 g pk), ensuring durability under extreme conditions.
- Sealing: Hermetic, with a leak rate of 5X10-8 atm•cc/s maximum, protecting internal components.
- Physical Size: 17.5 mm x 45.7 mm (11/16 in x 1.8 in), compact for tight installations.
- Weight: 58 g (2.0 oz), typical, lightweight for easy mounting.
- Mounting Thread: 3/8-24 female, with a mounting torque of 2.7 to 6.8 N•m (2 to 5 ft•lbf).
- Sensing Element: Ceramic, with shear geometry, offering high stability.
- Housing Material: 316L stainless steel, corrosion-resistant for long service life.
Industry Applications
This accelerometer excels in monitoring slow rotating shafts in fin-fan cooling systems, where low-frequency vibration analysis is essential for detecting bearing wear or imbalance. It also suits paper mills, cement plants, and other heavy industries where machinery operates below 600 RPM. The 200155-02-05 helps prevent unplanned downtime by providing early warning of developing faults.
Installation & Setup Guidance
Mount the 200155-02-05 using the 3/8-24 female thread, applying a torque of 2.7 to 6.8 N•m. Ensure the mounting surface is clean and flat for optimal signal transmission. Connect the excitation voltage between 4.7 and 5.5 Vdc, observing polarity: SIG+ positive with respect to SIG-. Allow up to 2000 ms settling time for the bias voltage to stabilize before taking measurements.
Maintenance & Reliability
Regularly inspect the accelerometer for physical damage or corrosion, especially in condensing humidity environments. The hermetically sealed design minimizes moisture ingress, but periodic verification of output bias voltage and sensitivity is recommended. With a ceramic shear sensing element and 316L stainless steel housing, the 200155-02-05 offers long-term reliability in demanding conditions.
Selection Guide & Purchasing Advice
When ordering the Bently Nevada 200155-02-05, verify the mounting stud option (02 = 3/8-24 to 3/8-24 UNF with 1-3/8 inch hex plate stud) and approvals (05 = Multiple Approvals). Ensure compatibility with your data acquisition system, particularly the ProTIM Option Low Frequency Acceleration-to-Velocity channel type (-05). Contact SpareTechPLC for current availability and lifecycle status before purchasing.
Frequently Asked Questions
Q1: What is the sensitivity of the 200155-02-05?
A1: The sensitivity is 10.2 mV/(m/s2) (100 mV/g) at 80 Hz, with a tolerance of ±12%.
Q2: What temperature range can this accelerometer withstand?
A2: It operates from -40 ºC to +105 ºC (-40 ºF to +221 ºF).
Q3: Is the 200155-02-05 suitable for hazardous area installations?
A3: Yes, it has multiple approvals including CSA, ATEX, and IECEx for use in hazardous environments.
Q4: What is the mounting thread size?
A4: The mounting thread is 3/8-24 female, with a recommended torque of 2.7 to 6.8 N•m.
Q5: How long does it take for the accelerometer to settle after power-up?
A5: The settling time is ≤2000 ms to reach within 5% of the bias voltage.
