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Title: Computer Application In Liquid Measurement Class 3100
Author: Peter P. Jakubenas
Source: 2001 International School of Hydrocarbon Measurement
Year Published: 2001
Abstract: Advances in computer and electronic technology are made every day. Forty years ago vacuum tube instruments were used when high-speed readout was required. Electromechanical counters that could go as fast as forty counts per second were just becoming reliable, but only if the circuit designer knew how to interface them to a pulse transmitter. Virtually all positive displacement meters had local mechanical readouts, and temperature compensation was done by liquid filled bellows driving wheel and disk integrators with planetary gear drives. Remote monitoring and control of metering stations required huge rooms full of clattering racks of relays - and the associated maintenance headaches, and rows of push buttons, counters, indicator lights and annunciator windows.

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