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Instruction Manual MA882, MA883, MA884 & MA885 Refractometers
for Wine and Grape Product Measurements
Specialized algorithms then apply temperature compensation to the measurement and
convert this refractive index to the model specific measurement unit.
MA882
,
MA883
,
MA884
and
MA885
measure sugar content in several units to meet
the differing requirements found in the wine industry.
MA882
,
MA884
and
MA885
convert the refractive index of the sample to sucrose
concentration in units of percent by weight, %Brix (also referred to as °Brix). The conversion
used is based on the ICUMSA Methods Book (International Commission for Uniform
Methods of Sugar Analysis). Since the majority of sugar in grape juice is fructose and
glucose and not sucrose, the reading is sometimes referred to as “Apparent Brix”.
MA883
has units of °Baumé. The °Baumé scale is based on density and was originally
designed to measure the mass of sodium chloride in water. °Baumé is used in wine
making to measure the sugar in must. The
MA883
converts the %Brix reading to °Baumé
based on the table found in the Official Methods of Analysis of AOAC International, 18
Th
Edition. 1 °Baumé is approximately equal to 1.8 %Brix, and 1 °Baumé is roughly equivalent
to 1 % alcohol when the wine is fully fermented.
In addition to %Brix,
MA885
includes two other scales used in the wine industry: °Oechsle
and °KMW.
MEASUREMENT UNITS
