Proceedings of the ISA Conference and Exhibit.In tfre laboratory /manual system, a variable high gain amplifier output for the FID is provided so that the operator may monitor the hydrocarbon content of the sample stream. This is particularly useful when operating on hydrocarbon stream with varied compositions. ... These points would be monitored by readout devices such as digital voltmeters and/or strip charts. ... conversion is complet-. ed, the value is shifted into an output register which functions as a parallel to serial converter.
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