LaMotte OCTET COMPARATOR & BI-COLOR READER - Manual

OCTET COM PARA TOR &
BI-COLOR READER
This instruction manual is furnished with LaMotte Octet Comparator
Test Kits to outline in general terms the proper technique for the use and
handling of the Octet Comparator and Bi-Color Reader. Individual
instructions supplied with each chemical test kit specify actual test
procedures.
USE OF THE OCTET COM PARA TOR
The Octet Comparator contains eight permanent
color standards. A test sample is inserted into the
openings in the top of the comparator. The sample
can then be compared to four color standards at
once, and the value read off the comparator. For
optimum color comparison, the comparator should
be positioned between the operator and a light
source, so that the light enters through the special
light-diffusing screen in the back of the
comparator. Avoid viewing the comparator against
direct sunlight or an irregularly lighted background.
THE BI-COLOR READER · CODE 2151
Natural color or turbidity in a test sample may affect the color developed
in a test reaction. The LaMotte Bi-Color Reader, used in conjunction
with the Octet Comparator, compensates for this color variation. The
comparator standards are viewed against test sample blanks, so that any
color variation due to natural color or turbidity will be uniformly
exhibited by the color standards and the test sample. Even if the color
variation is pronounced, the accuracy of the test result will be maintained.
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