Gardner LCM IV User Manual

Press Add Data to include additional measured values in the 
trend.

Take a representative sample from the product you wish to 
measure in accordance with DIN EN ISO 15528 (or ASTM 
D3925-02).

If the material shows any signs of turbidity, remove this turbidity 
by filtration, centrifuging, heating, ultrasound treatment or other 
suitable means.

Heat partly solid samples before measuring in order to dissolve 
the solid material in the liquid. The preparation must not cause 
any chemical changes in the sample.

Make sure that during the measurement there are no bubbles in 
the sample.

For the color difference measurement, three cuvette types are 
available that differ in terms of material (glass, PS and PMMA) 
and path length (10 mm, 11 mm and 50 mm). Add approx. 2  cm 
of the sample to the cuvette. The light beam passes through the 
cuvette approx. 0.5 cm to 1.5 cm above the bottom of the cuvette.

The program calculates the iodine, Hazen, Gardner, Saybolt, 
Klett and ASTM D 1500 color values automatically and displays 
the color values. The cuvette type being used is taken into 
consideration.

A dry thermostat is available for the round disposable glass 
cuvettes with 11 mm. The dry thermostat heats up the cuvette to 
any temperature between ambient temperature and 150 °C 
(302 °F).

Always hold the cuvette/sample cell close to the top to make 
sure that there are no fingerprints in the measurement zone 
of the cuvette/sample cell. Use suitable transfer pipettes to 
introduce samples into the cuvettes/sample cells.

Slowly add samples to the cuvettes/sample cells to make 
sure air bubbles do not form on the cuvette/sample cell wall 
and in the sample. Air bubbles will cause false readings.

The samples must be clear and free of turbidity. If products in paste or 
solid form cannot be measured directly, the product must be melted 
before being transferred to the cuvettes/sample cells. Make sure the 
cuvettes/sample cells do not contain any air bubbles.