How do I calibrate my older Colorimeter?

There are two models of Vernier Colorimeters. The older model (rectangular shape) has three wavelength settings, and the newest model (a rounded shape) has four wavelength settings. The newer model is an auto-ID sensor and supports automatic calibration (pressing the CAL button on the Colorimeter with a blank cuvette in the slot). If your Colorimeter does not have a CAL button, use the instructions in the document below to calibrate your Colorimeter.

http://www.vernier.com/til/files/1665/colorimeter_calibration.pdf

If you are using EasyData for data collection, Vernier can provide you with Experiment AppVars for the Colorimeter. Please contact Vernier if you are interested in obtaining this file.