If your UltraScan XE is drifting or is not reading accurately, perform the steps below to attempt to diagnose and/or correct the problem.
Clean the standard tiles as described here.
Verify that the instrument is placed in a clean, climate-controlled environment with no drafts. Verify that the instrument is on a dedicated power line and is surge protected.
Clean the lens using photographic-quality lens solution and lens paper. Put a few drops of solution on the lens paper and gently wipe the lens in a circular motion for a few seconds. Then wipe the lens with a dry lens paper to remove streaks and any hazy film.
If readings are still unsatisfactory after following these instructions, instrument service may be required.
To read Six Things You Can Do to Help Your Instrument Perform at Its Best, click here.
If additional assistance is required, you may contact HunterLab.