ALTANA LCM plus - Manual (Page 13)

BYK-Gardner GmbH LCM plus 235 017 133 DE 0302
42
Measuring procedure
1. Fill the sample liquid into a cuvette and insert it into the
corresponding compartment. Measurement starts auto-
matically.
2. After the measurement, the colour value is indicated on the
display.
3. Now press the -key (DIM) until the Hazen number appears on the display.
C5 Gardner Colour Number
The Gardner colour number is defined in DIN ISO 4630. The lighter Gardner colour standards (1 to
8) are based on potassium-chloroplatinate solutions, colour numbers 9 to 18 on ferric(III)-chloride,
cobaltous(II)-chloride and hydrochloric acid solutions. LCM plus determines the Gardner number at
all cuvette path lengths (in 50mm cuvettes only values between 0 and 4), with 11mm cuvettes
providing sufficient accuracy.
Measuring procedure
1. Fill the sample liquid into a cuvette and insert it into the
corresponding compartment.
2. After the measurement, the colour value is indicated on the
display.
3. Now press the -key (DIM) until the Gardner number
appears on the display.
C6 Mineral Oil Colour Number ASTM D 1500 And ISO 2049
The Mineral Oil Colour Scale is used for matching the colours of mineral oil products like lubricating
oil, fuel oil, diesel oil and paraffins. The colour scale begins at 0 for water-clear, colourless oils
and ends at 8 for very dark brown oils. Visual matching is in steps of 0.5 (0.5 1.0 1.5...). LCM
displays the results in steps of 0.1. For samples of stronger hue than colour glass 8, colour value
D8 is displayed.
Owing to the intensive colour gradation of the ASTM 9 D 1500 colour number, this is only
determined for the 11mm round cuvette. There is no determination of path length 50mm.
9 American Society for Testing and Materials
20
Hazen color value
_DIM ¢Conf 50°
6.5
Gardner color
value
_DIM ¢Conf
11°