Geothermal logging instrumentation development progress report

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Evaluation of the first 275 C voltage regulators delivered by Teledyne Philbrick has begun. Teledyne delivered 50 units to Sandia; testing is being performed with the aid of microprocessor based testers and laboratory ovens. Thus far, the units short-term stability and output voltage temperature coefficient are within specification. The 4000 pF capactiros have been successfully fabricated for the Teledyne Philbrick voltage-to-frequency converter hybrid circuit. The capacitors are stable in that they changed less than {+-} 1.5% between room temperature and 300 C. The Sandia exhibit of high temperature components and hybrid circuits was well received at the annual Geothermal Resources ... continued below

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Creator: Unknown. September 1, 1979.

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Description

Evaluation of the first 275 C voltage regulators delivered by Teledyne Philbrick has begun. Teledyne delivered 50 units to Sandia; testing is being performed with the aid of microprocessor based testers and laboratory ovens. Thus far, the units short-term stability and output voltage temperature coefficient are within specification. The 4000 pF capactiros have been successfully fabricated for the Teledyne Philbrick voltage-to-frequency converter hybrid circuit. The capacitors are stable in that they changed less than {+-} 1.5% between room temperature and 300 C. The Sandia exhibit of high temperature components and hybrid circuits was well received at the annual Geothermal Resources Council Meeting in Reno, Nevada, during September 24-26, 1979. A high percentage of attendees requested purchase information for the display items. Such interest indicates a ready market for commercialization. Development of a 300 C integrated circuit, operational amplifier (op amp) is underway at Harris Semiconductor under a Sandia contract. This 300 C op amp will be pin-for-pin replacement for the popular Harris HA4602 quad op amp (rated to 125 C) that is commonly used in many commercial logging tools.

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  • Report No.: GLI-79-1-Z
  • Grant Number: None
  • DOI: 10.2172/895339 | External Link
  • Office of Scientific & Technical Information Report Number: 895339
  • Archival Resource Key: ark:/67531/metadc878450

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  • September 1, 1979

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 8, 2016, 2:49 p.m.

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Geothermal logging instrumentation development progress report, report, September 1, 1979; United States. (digital.library.unt.edu/ark:/67531/metadc878450/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.