112Expanded programs7. Connect the USB memory stick to the USB port (type A) onthe instrument, refer to section 3.5, page 18.8. Press OK to confirm.The link is established automatically and the software isupdated.9. Press OK to return to the "System Check" menu.Note: After the instrument update, a prompt to restart the instrument willbe displayed.6.8.3 Optical Checks1. Press Optical Checks in the "System Check" menu.The "Optical Checks" menu contains programs for checking thewavelength accuracy, stray light and photometric accuracy.An optional test filter set (Verification Kit) Section 9, page 137containing six precision glass filters, target values andinstructions is available as an aid for carrying out comprehensivein-house instrument checks.6.8.3.1 Verification kitThe Verification Kit (refer to Section 9, page 137) is designed forperiodic monitoring of scattered light, photometric accuracy andthe wavelength accuracy of the spectrophotometers.When results exceed allowable tolerances (given in the qualitycontrol certificate to the test record), contact the manufacturer.1. Press Verification Kit in the "Optical Checks" menu.2. Press Nominal Values.3. Press Edit.An automatic menu guidance queries values (filters,wavelength, nominal values and tolerances) given in thequality control certificate, to the following specifications:• Stray light• Photometrical accuracy• Wavelength accuracy4. Press OK when all values are entered and the overview isdisplayed.
