WirelessHART transmitters are becoming more popular. What are these transmitters and how do these differ from wired HART transmitters? Why do the WirelessHART transmitters need to be calibrated and how the calibration can be done? These and many other related issues are discussed in this article.
Bentley introduces the Bentley Infrastructure 500 Top Owners--a ranking of the top owners of infrastructure around the world from both the public and private sectors that will be published annually. The rankings make it possible to readily compare investment levels across types of infrastructure, regions of the world, and public and private organizations.
Why calibrate? For process manufacturers, regular calibration of instruments across a manufacturing plant is common practice. In plant areas where instrument accuracy is critical to product quality or safety, calibration every six months or even more frequently is not unusual. However, the key final step in any calibration process documentation is often neglected or overlooked because of a lack of resources, time constraints or the pressure of everyday activities. Indeed, many manufacturers are now outsourcing all or some of their maintenance activities and so the contractor too is now under the same pressure to calibrate plant instruments quickly but accurately and to ensure that the results are then documented for quality assurance purposes and to provide full traceability. The purpose of calibration itself is to determine how accurate an instrument or sensor is. Although most instruments are very accurate these days, regulatory bodies often need to know just how inaccurate a particular instrument is and whether it drifts in and out of specified tolerance over time.
So called "smart" instruments are ever more popular in the process industry. The vast majority of delivered instruments today are smart instruments. These new smart instruments bring new challenges to the calibration and configuration processes.