Inexpensive Temperature Feedback Controller for the Varian 63 CRA

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Construction details and the performance of a temperature feedback circuit added to the power suppy of a Varian model 63 furnace atomizer are discussed. The circuit incorporates a phototransistor temperature transducer and approximately $25 worth of readily available electronic components to implement both a variable temperature ramp rate and a variable maximum temperature function. The normal mode of operation can be selected if desired.

Keywords: Graphite furnace atomic absorption; Temperature feedback controller for GFAA atomizer

Document Type: Research Article


Affiliations: Allied Chemical Co., CPP, 550 Second Street, Idaho Falls, Idaho 83401

Publication date: November 1, 1979

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