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Title: Electronic Chart Scanning And Related Equipment
Author: James L. Corley
Source: 1975 International School of Hydrocarbon Measurement
Year Published: 1975
Abstract: The history of the modern Electroscanner dates back to May 1961, when the first model was delivered to the chart office of a major gas company. That particular instrument, consisting of a digital computer and two separate scan stations, carried the burden of considerable limitations. An example of this was that only 400 scans per chart were made. The chart illuminator was a straight fluorescent bulb, making even distribution of light difficult. A chart with superimposed traces could not be accurately scanned, and other problems too numerous to list existed. However, as with most new instruments, the need for improvements quickly became apparent, and steps were taken to find the answers. Today its successor, the new model digital Electroscanner, has overcome these early limitations and is a very accurate tool found in almost every major chart office.

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