FREEIntroduction to Uptime Elements Reliability Framework and Asset Management System

A range of vibration sensors and monitoring techniques are now available that can extend the operating life of automated machinery beyond recommended maintenance intervals and, at the opposite end of the scale, identify rapid increases in machinery vibration that could lead to a catastrophic failure.  These devices and techniques also enable operators to satisfy the ever-more robust regulations imposed regarding health and safety, which have made the use of vibration sensors in non-safe areas a prime requisite.  So, far from being an expensive option, the use of vibration monitoring can enable companies to operate with enhanced performance, reduced downtime and in accordance with health and safety legislation.

Mounted in a number of key positions on mechanical equipment, vibration sensors offer the potential for continuous monitoring and analysis, an inexpensive option when balanced against the potential cost of downtime on an automated line, and when condition monitoring measures are in place to detect factors such as vibration, machine downtime can virtually be eliminated.

There are two main types of industrial accelerometer: AC accelerometers and 4-20mA accelerometers.  AC accelerometers are typically used with data collectors for the vibration monitoring of more critical/complex machines, such as gearboxes and turbines.  Meanwhile 4-20mA components are commonly used with PLCs to measure lower value assets, monitoring such levels as pump vibration, motor vibration and machine vibration.

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Once you have specified the right equipment and installed carefully in order to yield the most repeatable and consistent measurement of vibration, machine reliability data can easily be analysed to predict potential problems before they occur.  Increases in machinery vibration indicate deteriorating operating conditions, such as wear or misalignment, and vibration sensors can identify these changes swiftly and with exceptional reliability.  A typical technique in vibration monitoring has been to examine the individual frequencies within the signal that correspond to certain mechanical components or types of malfunction, such as shaft imbalance or misalignment, so that analysis of this data can identify the location and nature of a given problem.

To specify a vibration accelerometer correctly, engineers need to consider the vibration level and frequency range to be measured, weight or fitting restrictions and environmental conditions, such as ambient temperatures, the presence of moisture, chemicals or potentially explosive atmospheres.  The best approach is to work closely with a supplier that has appropriate industry experience and knowledge.

A range of sensors with different capabilities are now available to suit a variety of applications. For example, Hansford Sensors has launched the HS-109 triaxial accelerometer, enabling three axes to be read simultaneously, which reduces measurement time.  Protected by a stainless steel casing, the HS-109 has an operating temperature range of -55 to 140 ºC and is sealed to give an ingress protection level of IP67.

As more and more companies become increasingly dependent on physical rather manual assets, automation brings a new set of challenges.  As an essential tool for industry, delivering benefits that include increased productivity, consistent quality and cost reduction, automation has the potential to boost productivity and efficiency, not to mention product quality, but it can only do so if the plant is adequately monitored and protected.  It therefore makes good business sense to protect automated production lines with vibration monitoring equipment.

For more information on the extensive range of Hansford Sensors products, please visit www.hansfordsensors.com.

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