The document provides information about the Quawell Q3000 Nanodrop spectrophotometer. It describes the basic operation of the device, including how to take blank and sample measurements. Key features are its ability to accurately measure nucleic acid and protein concentration without using cuvettes. Maintenance involves regularly cleaning the measurement surfaces to prevent residue buildup. Absorbance is calculated by comparing the light intensity of a sample to that of a blank reference reading stored in memory.