Summary
This color scale is suitable to determine color of various
lubricating oils and other petroleum products as per industrial
standard of China SH/T 0168-92 Standard Test Method for Color of
Petroleum Products. The test methods are as follows: Fill test
sample into color comparing tube and compare sample color with
standard color to ascertain its color number. Please see the
attached color number comparing sheet to find out the similarity
between color number of the instrument and color number in standard
GB/T6540.
I. Main technical specifications
1. The colorimeter is composed of standard color dial, observation
lens, light source and color comparing tube.
2. The light source is a 220 V, 100 W, with temperature of 2750±50
K grinding milk white light bulb. After filtering color by milk
white glass and sunshine filtering glass, the spectrum
characteristics of light gained from sunshine is similar to it. The
standard light will change into two parallel lights, which is
similar in size, trough plane reflection mirror and prism. The
parallel lights will irradiate on sample in the color comparing
tube on the color glass of standard color dial evenly and
respectively.
3. There are 26 pieces of Φ14 light holes. And standard color
glasses having 1～25 color number are installed in the 25 of these
holes in sequence. The 26 hole is blank. The color dial is rotated
by a hand wheel installed at right side of instrument to choose the
correct color during color comparing test. The standard color
comparing glass on the color dial should be calibrated by standard
color comparing liquids.
4. The color comparing tube is Φ32 mm, 120～130 mm high non-colorful
flat bottom glass tube. The color comparing tube is placed into
instrument trough a lid on the top of the instrument.
5. The observation lens is composed of concave mirror and separated
bar. You can see two semicircle colors through observation lens.
The right semicircle is standard color. The light and focus of
optical observation lens can be adjusted, so it is easy to be used.
