Science Buddies: "Ask an Expert"

My science fair project is this: https://www.sciencebuddies.org/science- ... #procedure
How Blue is Your Sports Drink? I got all the way to step 7, however, when I put the cardboard box on top and try to test the resistance, the reading just stays at 1
I may be doing something wrong. Please explain and be very specific. Thanks!

Hi Aleks - it's very important to have your multimeter set up correctly for this to work. First, make sure you follow step 4 exactly to set up your multimeter. Then, have you tried this, as listed in step 7b?

"If your multimeter screen displays a "1 .", that means the resistance is too high for the dial setting. Turn the dial up to the next highest range (for example, from 200 to 2000) and check again."

(note that I assume you're talking about the steps in the "Part 1: Building and Testing the Spectrophotometer" section.)