Lovibond ICx Operator Instruction Manual
PDF · Manufacturer document
They serve different purposes: a baseline establishes the reference, a glass filter checks specified instrument performance, and a liquid standard also involves the cell and loading.
Why
The ICx glass-filter check uses an empty-chamber baseline, not the same operation as a water-filled cell.[1]
Liquid standards pass through the sample cell and optical path, so cleaning, path length, position and loading affect the result.[1][2]
What to confirm
Identify the check first, then follow its accessory and baseline instructions. Separate instrument condition from cell and handling factors; do not substitute the three results for one another.
References
- [1] Lovibond ICx Operator Instruction Manual, PDF page(s) 39–40 (file page order). View reference resource
- [2] Lovibond ICx High-Precision Colour Measurement of Clear Liquids, PDF page(s) 4 (file page order). View reference resource