Metrohm Vision – Diagnostics - Manual (Page 22)

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3
Wavelength Certification
Wavelength Certification uses an external standard, with known peak positions, to verify the
wavelength scale of the instrument. The program is designed to run a certified Wavelength Standard
available from Metrohm. For reflectance measurements the standards are traceable to SRM-1920,
supplied by NIST. The standard for XDS reflectance instruments is SRM-1920 plus talc. For liquid
transmission systems the wavelength standard is polystyrene-didymium (XC-1310/XC1320) or
SRM-2035 (XC-1330). Vision also offers the option of a user-defined wavelength standard, with
appropriate tools for peak-finding and tolerances.
3.1 Run Wavelength Certification
Click on Diagnostics, Wavelength
Certification, Run Wavelength
Certification.
The Number of samples should be
10, as shown. Select the correct
standard for the instrument type
being used from the drop down
menu.
Click “OK” when ready.
Vision requests the Standard File for the
wavelength standard. This file is located on the
diskette or CD packed with the 6-piece standard
set.
It may be read using the A: drive, or may be
copied into the C:\Vision directory as shown
here.
The file name will be similar to that shown
below.
Click “Open” to proceed.