Basic program

IMPORTANT NOTE: The latest version of the IO Rodeo open hardware colorimeter is the Open Colorimeter. The Open Colorimeter is actively supported. We recommend you visit https://blog.iorodeo.com/open-colorimeter/ for more up-to-date information. This documentation site is for the archived Educational Colorimeter Kit. While we no longer support this version, we wanted to keep this documentation site available for anyone that is still interested in the project. If you have any questions, please email us at info@iorodeo.com.

This program reports the Transmittance and Absorbance measured by the colorimeter for the wavelength(s) of light selected by the user. For an example of a lab using this program see Lab 1: Introduction to Colorimetry.

Procedure: Connect-Calibrate-Measure

With the basic program window open enter the serial port corresponding to your device in the program window and click on the “Connect” button in the lower left-hand side.

Place a cuvette with your ‘blank’ measurement (e.g. water) inside the colorimeter and click “Calibrate”. The data tables will display a value of 1.00 for Transmittance and 0.00 for Absorbance on all color channels. See Calibrating the colorimeter for more information.

Place a cuvette containing your sample inside the colorimeter and click “Measure”. The Transmittance and Absorbance tables will display the measurements corresponding to the selected color channels. In addition, a second window will automatically open, displaying a bar graph of the measurements.

Additional software features

See Software features for more information on these features.

Custom wavelengths.
Save data at any point after calibration using the “File -> Save” menu item at the top of the program window.
Plot on/off. Use checkbox to display or hide plotted data.
LED on/off. Use checkbox next to each led to deselect one or more of the leds at any time after calibration. The program will display values only for the selected color channels.
Change sample rate.

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