1, press "Go toλ" key, enter set wavelength;

2, four colorimetric dishes, where the R position of the reference sample, the remaining three into the test sample. Placing the colorimetric dish in a colorimetric tray in the sample pool and covering the sample pool cover;

3, the reference sample is pushed into the optical path, according to the "abs%" key, so that the instrument automatically 0 and full degree;

4. Then the test sample is pushed into the light path to show the absorbance value of the sample;

5, if you want to test the kind of data to print out, just press "Start/stop" key can.