Crucial Role of Single-Axis Sensors in Equipment Acceptance Testing

Acceptance testing is a critical phase in the implementation of new manufacturing equipment. Vibration analysis can be used as an acceptance testing tool to validate the structural integrity and performance reliability of newly deployed machinery. Selecting the right sensors is paramount to obtaining reliable data that can inform decisions about whether the equipment meets acceptance criteria.

When it comes to choosing sensors for this crucial task, opting for the best-performing single-axis sensors with the tightest sensitivity tolerances can be the key to accurate and dependable results. In this blog post, we delve into the reasons behind key criteria to consider:

Single-Axis vs. Triaxial Sensors

Triaxial sensors are designed to provide the most efficient experience will performing route-based data collection by collecting three axes of data simultaneously. However, triaxial sensors are often less precise than single-axis sensors due to the position of the sensing elements within the sensor and the increased sensor mass. 

Since route-based condition monitoring often involves monitoring data trends over time, the trade-off in precision is typically of no concern However, when it comes to acceptance testing, having access to the most precise data is imperative. As a result, taking the time to mount single-axis sensors is a prudent choice.

Sensitivity Tolerance

Tight tolerances in sensors mean they can maintain accuracy within specified limits, providing more reliable and repeatable results. This reliability is paramount in acceptance testing, where decisions about the readiness of manufacturing equipment for mass production are made. 

Typical tolerances are ±5%, ±10%, ±15%, and ±20%, where 5% would be considered a premium tolerance and 20% would be considered a marginal tolerance. Typical user values are 10% and 15% for general-purpose vibration measurements. If you were to choose a 100 mV/g accelerometer with a ±10% sensitivity tolerance, the calibrated output of the sensor could range from 90 mV/g (-10%) to 110 mV/g (+10%). For acceptance testing, having a sensor with a premium 5% sensitivity tolerance will yield the best results.

CTC's AC292 Sensor is the premier choice for acceptance testing. It features a compact case design, a wide frequency response 0.3 - 15,000 Hz (18 - 900,000 CPM), and boasts a sensitivity tolerance of ±5% or better.

AC292 Premium Compact Accelerometer, Top Exit 2 Pin Connector, 100 mV/g, ±5%

• -58 to 250 °F (-50 to 121 °C) Temperature Range
• Welded, Hermetic Sealing
• Superior RF Immunity in a Compact 100 mV/g Sensor