Using accelerometers in condition monitoring

Accelerometers are critical in establishing a well-functioning condition monitoring system. PACE takes a look at a new portable accelerometer calibrator, the 28959G.

The era of automation has elevated the role of sensors as integral components along the entire supply chain of manufacturing process. They are integrated in the process machinery and are critical to supply engineers and operators with machinery data. It is essential to monitor this data to identify changes and issues that may signify potential process along the manufacturing chain.

Accelerometers are essential as part of condition monitoring system. Faults or potential defects in products and machinery can be easily identified by comparing the measured vibration level with their reference data. It is of utmost important to ensure that these values are accurate to avoid misfeeding of information.

Headquartered in the UK, Meggitt- Endevco is a company that specialises in providing state-of-the-art solutions for vibration monitoring in extreme and dynamic environments. The product line covers a wide range of accelerometers, piezoresistive pressure sensors, signal conditioners and calibrators.

As the authorised distributor of Meggitt-Endevco in Australia and New Zealand, Bestech Australia is committed to continuing to offer high- quality sensors for vibration testing and measurement to the local industry. The company’s product specialists and factory-trained application engineers provide advice and high-quality technical support.

Recently, Bestech announced the release of the portable accelerometer calibrator, 28959G, to the Australia and New Zealand market. This portable vibration calibrator is designed for field calibration of various types of accelerometer with the highest precision. It is a self-contained calibration system that consists of a built-in exciter, signal generator, servo-amplifier, internal reference accelerometer, USB connectors, signal conditioners and all necessary mounting accessories.

One of the unique features of 28959G is its capability to calibrate charge-type piezoelectric, IEPE, piezoresistive and variable capacitance accelerometer in one system. To date, this is the only device available in the market that is able to do so, as other similar calibrators are unable to support both piezoresistive and variable capacitance accelerometer together.

The 28959G portable vibration calibrator is best suited for condition monitoring application and may also assist in fault finding in the industry. There are multiple scenarios in the industry where the application of this instrument is ideal.

One of the applications is in the process monitoring chain in the manufacturing industry. It can be used to determine whether excessive vibrations are present in the machine, indicating faults or defects. This ensures that the process can be accurately monitored in the long term to prevent costly downtime.

This portable accelerometer calibrator can also be used to identify which part of the process monitoring chain is faulty. It can indicate whether the faults lie within the accelerometer, the machinery, or the connecting parts. As this device combines a small electrodynamic shaker and a servo loop controller, it can be used as spot calibration or automated calibration of accelerometers with different levels of G to obtain the NIST calibration certificate. This offers the users capability to conduct on-site calibration without having to send the instrument back to the manufacturers.

The device can also operate as a standalone shaker, generating zero frequency and zero amplitude. This is useful to check the measurement chain all the way to the control room. This device will provide great benefit for fault finding applications especially in process and control environment. It can be used to check the performance of individual components separately and as a whole to single out the source of issue.

Although it is not common, the 28959G can also be used as quality control in the manufacturing industry, especially when used to check the welding quality of products. By measuring the resonance frequency of the finished product and comparing it with the reference value, users can determine the faulty products easily.

With the release of 28959G, fault finding in the process and controls environment should be easier. It can also assist the manufacturing industry to streamline their quality control process. The 28959G portable calibrator is an excellent addition to the product portfolio of Bestech Australia as a leading supplier of sensors and instrumentation technology for test and measurement applications in the industry.