Vernier Software and Technology's LabPro® data acquisition device1 has the cursorily documented2 ability to measure resistance. Here we describe how to build a resistance probe and how to configure Vernier's Logger Pro® data acquisition software to automatically detect and understand the probe. We discuss the range, accuracy, and limitations of this ohm-meter. When this probe is used with voltage and current probes already available from Vernier, the LabPro may be used as a digital multimeter.

Topics
Electrical equipment, Data acquisition
1.
Vernier Software & Technology, Beaverton, OR 97005; http://www.vernier.com.
2.
LabPro® Technical Reference Manual (Vernier Software & Technology, Beaverton, OR, 2000), p.77.
3.
Logger Pro 2.2.1 uses a quite different approach for identifying and configuring probes. Files and instructions for using this resistance probe with Logger Pro 2.2.1 can be found on our website; http://www.physics.pdx.edu/∼bodegom/ohmmeter.
4.
This is not true for Logger Pro 2.2.1, since this version requires specific probe configuration files. The files needed to use the LabPro as multimeter are available on our website; http://www.physics.pdx.edu/∼bodegom/ohmmeter.
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© 2004 American Association of Physics Teachers.
2004
American Association of Physics Teachers
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