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51315-5918-Using Remote Data-Logging Techniques to Evaluate Transit System Interference

Picture for Using Remote Data-Logging Techniques to Evaluate Transit System Interference
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Product Number: 51315-5918-SG
ISBN: 5918 2015 CP
Author: Jamey Hilleary
Publication Date: 2015
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$20.00
$20.00
Keywords: Remote monitoring data-logging reverse current switch DC transit system interference CP cathodic protection measurement DC voltage AC voltage pipelinesAbstract: One of the challenges facing corrosion professionals is the co-location of pipelines with other sources of interference in congested urban and suburban right of ways. Often it is a significant problem just isolating the various sources of interference currents so proper steps may be taken to mitigate the interference and protect the affected pipeline. Evaluating the effects of electric transit systems can be a particularly difficult task as the interference is typically only significant in short intervals. Additionally multiple data parameters including: AC and DC potentials AC and DC current densities and reverse current switch measurements should be gathered synchronously to build an accurate profile of the total interference incurred. Data-logging at locations of suspected high interference can be used effectively for evaluation but the time synchronization of the data events across multiple sites is not always accurate if the proper equipment is not employed. Historically the process of gathering and interpreting several parameters of data from multiple locations can be very time-consuming and costly. Web-based remote access data-logging systems have evolved to the point where multiple time-stamped data measurements can now be acquired accurately and efficiently from multiple sites and delivered to the user with insignificant (non-critical) data filtered out. Cathodic protection professionals now have technology available to streamline processes which were previously impractical making these large data sets usable and ultimately developing a clear picture of the interference from intermittent sources such as electrical transit systems. This paper is a case study of the use of web-based monitoring systems with remote data-logging capability to acquire critical data and develop interference profiles on pipelines due to electric transit systems. The focus is on challenges of synchronizing time-based events across multiple sites and correlating the data back to the intermittent activity producing the interference from the transit system. An additional challenge is identifying sources of interference that are not associated with the transit system which may potentially distort the interference profile.
Keywords: Remote monitoring data-logging reverse current switch DC transit system interference CP cathodic protection measurement DC voltage AC voltage pipelinesAbstract: One of the challenges facing corrosion professionals is the co-location of pipelines with other sources of interference in congested urban and suburban right of ways. Often it is a significant problem just isolating the various sources of interference currents so proper steps may be taken to mitigate the interference and protect the affected pipeline. Evaluating the effects of electric transit systems can be a particularly difficult task as the interference is typically only significant in short intervals. Additionally multiple data parameters including: AC and DC potentials AC and DC current densities and reverse current switch measurements should be gathered synchronously to build an accurate profile of the total interference incurred. Data-logging at locations of suspected high interference can be used effectively for evaluation but the time synchronization of the data events across multiple sites is not always accurate if the proper equipment is not employed. Historically the process of gathering and interpreting several parameters of data from multiple locations can be very time-consuming and costly. Web-based remote access data-logging systems have evolved to the point where multiple time-stamped data measurements can now be acquired accurately and efficiently from multiple sites and delivered to the user with insignificant (non-critical) data filtered out. Cathodic protection professionals now have technology available to streamline processes which were previously impractical making these large data sets usable and ultimately developing a clear picture of the interference from intermittent sources such as electrical transit systems. This paper is a case study of the use of web-based monitoring systems with remote data-logging capability to acquire critical data and develop interference profiles on pipelines due to electric transit systems. The focus is on challenges of synchronizing time-based events across multiple sites and correlating the data back to the intermittent activity producing the interference from the transit system. An additional challenge is identifying sources of interference that are not associated with the transit system which may potentially distort the interference profile.
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