A Simple Supplementary Offset Device for Data Acquisition Systems

Thomas Kappes and Peter C. Hauser
The University of Basel, Department of Chemistry, Spitalstrasse 51, 4056 Basel, SWITZERLAND
J. Chem. Educ., 1999, 76 (10), p 1429
DOI: 10.1021/ed076p1429
Publication Date (Web): October 1, 1999

Abstract

The offset function of chart recorders or digital data acquisition systems are often insufficient, especially when a small signal is to be measured with a high resolution on top of a large background. The device described in this article offers in a simple way the possibility of extending the offset range and can be combined with any data acquisition system. The signal offset is obtained by adding a manually adjustable voltage to the raw signal. Amplification and noise filtering options can be implemented. The device is built from standard electronics components and is easy to assemble.

Keywords (Audience):

First-Year Undergraduate / General

Keywords (Feature):

Cost-Effective Teacher

Keywords (Subject):

Instrumental Methods
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  • Received: August 03, 2009

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