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Author: Al Majek
Source: 2017 Appalachian Gas Measurement Short Course
Year Published: 2017
Abstract: Prior to flow computers being commonly used in the measurement of hydrocarbons, most telemetry systems were used to collect control information and real time data and provide control commands to Remote Terminal Units (RTU). Most of the local metering was being handled by chart recorders and local data collection by operations personnel. The collected charts were sent to the central facility where the information provided custody transfer reports and or field operations reports. Most of the commonly used chart recorders were the standard circular chart format and pneumatic devices. These were used to process the information for billing, regulatory operations, and monthly operations, but generally culminated into a cumbersome and costly task. The measurement departments often had to deal with discrepancies in data and information that was often weeks or months old. There was an urgent need for collecting real time information from metering equipment and custody transfer data. Although there were telemetry systems in place, collecting real time data and getting this information to a central office was not easily accomplished with the early types of SCADA systems in place.

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