115Expanded programs7. Inset sample cell 1 (Figure 3, page 19) in cell compartment(1) a press Next.8. Follow the dialog indicated.9. After the fifth test cell, the photometrical accuracy isdisplayed in a log.6.8.3.3 Wavelength checkThe Wavelength Check test is used to check wavelengthaccuracy at 807 nm.1. Press Wavelength Check in the "Optical Checks" menu.2. Insert the cell adapter (A) for 10-mm rectangular cells in thecell compartment (2).3. Place the analysis cell (Neodym or BG20/2) in the celladapter.4. Close the cell compartment cover.5. Press Start.The result will be displayed.6. Compare the result with the analysis cell required values.7. Press Cancel to return to Optical Checks.6.8.3.4 Stray light checkThe Stray Light test is used to measure the stray light in theinstrument at 340 nm.
