Open the “simple reads” program, found as a desktop icon or under the Cary WinUV menu under the “Start” button. To set the instrument, click the “Setup…” command button on the left side of the screen....Open the “simple reads” program, found as a desktop icon or under the Cary WinUV menu under the “Start” button. To set the instrument, click the “Setup…” command button on the left side of the screen. Close the lid completely, and press the “Zero” command button on the left side of the screen to zero the instrument at the chosen wavelength. Insert a cuvette containing a sample into the instrument, close the lid completely, and press the “Read” button at the top of the screen.