Purge the spectrometer with clean, dry air or nitrogen. Solvents that produce HCl or HF vapors in the sample compartment may severely damage the system. While the NicoletTM SummitTM Spectrometer is designed to be a safe instrument, you should take a few precautions to protect yourself from potential hazards that can arise during normal use and maintenance. CAUTION This guide is an introduction to potential dangers that you should be aware of, but. he OFF position. window, click on the ON/STA age leave the machine running in an abnormal state. This booklet covers the following ranges of instruments: • Ultrospec™10celldensitymeter • Novaspec™IIIandNovaspecPlusVisiblespectrophotometers • GeneQuant™100&1300UV/Visiblespectrophotometers • Ultrospec2100/7000/8000/9000 UV/Visible spectrophotometers •. In order to make the measurement stable, turn on the power switch and preheat the spectrophotometer for 20 minutes. Add the standard solution/sample solution to the cuvette that has been washed with the corresponding standard solution/sample solution, and dry the liquid on the outside of the cuvette with absorbent paper, especially the smooth.