Instructions for performing the didymium filter check using EasyMatch Coatings can be found here.
Instructions for performing the didymium filter check using EasyMatch QC can be found here.
Instructions for performing the didymium filter check using EasyMatch Textiles can be found here.
Instructions for performing the didymium filter check using Universal Software can be found here.
If the values are still out of tolerance after following these instructions, instrument repair may be required.
If additional assistance is required, you may contact HunterLab.