Gardner LCM IV User Manual

If air bubbles are entrapped, remove them by heat, vacuum, 
ultrasonic treatment or other suitable means. 

Clean the outside of the cuvettes/sample cells thoroughly 
before inserting them in the cell compartment.

Proper sample preparation is extremely important for accurate 
color measurement. To make sure that an exact measurement is 
taken, refer to the following sample preparation guidelines: 

Always clean the glass cuvettes/sample cells immediately 
after use. 

Only use optically preferred samples for measurement. Make 
sure the cuvettes/sample cells are clean and show no signs 
of opaqueness. 

Slowly add the liquid to the cuvette in order to prevent the 
formation of air bubbles in the sample.

Chapter 

 contains further information on 

preparing and taking samples. 

The color measurement mode is used to determine absolute 
color values in the Hazen, Gardner, CIE L*a*b* or European 
Pharmacopoeia color scales.

For each cuvette type (11 mm round cuvette and 10 and 
50 mm square cuvettes), an independent calibration data record 
is used. 

It is possible to calibrate the instrument with one, two or three 
types of cuvettes/sample cells and to use these different 
cuvette/sample cell types in parallel.

To use the 10 mm square cuvette and 11 mm round cuvettes, 
adapter Z must be inserted into the cuvette compartment (2). For 
measurements with 50 mm square cuvettes, you must remove 
the adapter.

Before using disposable cuvettes/sample cells made of PS 
(Polystyrene) or PMMA (Polymethyl methacrylate), be sure that the 
cuvettes/sample cells will not be destroyed by samples, otherwise the 
cell compartment can be damaged.