Inexpensive Digital Monitoring of Signals from a Spectronic-20 Spectrophotometer

• Alex Whitla ^[1] ; Matthew E. Morgan ^[3] ; John R. Amend ^[2]
  1. [1] Mount Allison University

     Mount Allison University

     Canadá

     
  2. [2] Montana State University

     Montana State University

     Estados Unidos

     
  3. [3] Department of Chemistry, U.S. Air Force Academy

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• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 77, Nº 2 (February), 2000, págs. 252-252
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Obsolete analog-readout vacuum-tube and solid-state Spectronic-20 family spectrophotometers can be found in most college and university chemistry laboratories. While optically these are good single-beam instruments, their electronics package does not permit attachment of recorders or digital displays. This article describes a simple modification that costs less than $10.00 for parts and will permit direct digital readout of the Spectronic-20 signal with a digital voltmeter or a laboratory interface and a computer. When the external plug is removed, the Spectronic-20 reverts to its normal operating mode.