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7.
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7.
Additional information for medical
personnel and laboratories
7.1 Measuring principle
An unused test strip is inserted into the meter. Light from an
LED (light emitting diode) is directed towards the test strip
from below and the blank value of the test strip determined by
measurement of the reflected light. Then a small drop of blood
is applied to the test area on the strip.
If the blood is to be applied outside the meter the procedure
described in Chapter 3.3 is used.
The constituent to be determined in the applied sample
undergoes an enzymatic reaction with formation of a dye, the
amount of dye formed increasing with the concentration of the
substance to be determined. After a certain period of time,
which is dependent on the test being performed, the meter
measures the colour intensity. This is done by directing light
from an LED towards the test area from below and measuring
the intensity of the reflected light with a detector.
For calculation of the result, the signal of the reflected light is
analyzed in relation to the initially measured blank value with
the help of the information programmed into the meter and the
information read into the meter from the code strip belonging
to the respective test strip pack.
The result is then displayed.
011553 AccuGC GB 19.02.2002 10:40 Uhr Seite 98