KROHNE OPTIMASS Sensors Concentration Measurement EN - Manual (Page 8)

3
CONCENTRATION MEASUREMENT
8
OPTIMASS
www.krohne.com 01/2014 - 4000733002 - AD OPTIMASS Concentration R04
OPTIMASS meters measure density and temperature. From these measurements and the
known characteristics of sucrose solutions, a °Brix value can be calculated. As with the
refractomoter, if there are any other components present in the product, the displayed Brix
value will only be approximate. The approximate values cannot be expected to match exactly the
approximate refractor values. This is because the impurities might not have the same effect on
the refective index as they do on density. Solid particles in the product will not effect how light is
refracted when passing through the rest of the liquid but they will affect its density.
It is possible to correct the °Brix measurment by using menu option C2.2.2 (Concentration 1) or
C2.3.2 (Concentration 2) Conc.Offset
3.2.3 °Plato
° Plato is the concentration, by mass, of sucrose in pure water. The °Plato is directly
proportionate to the percentage of sucrose by weight, so 10g of sugar in 100g of pure water has a
value of 10 °Plato. The °Plato value of a solution does not vary with temperature which means
that if a 100g solution contains 40g of sugar, the sugar content will remain at 40g regardless of
any change in temperature.
The concentration flow is calculated using the formula:
Concentration total is the accumulation of concentration flow over time
3.2.4 °Baumé
° Baumé is a concentration scale of sugar or starch in water. The °Baumé scale is based on the
specific gravity of sucrose solutions d 15 /
15
relative to water at 15.5°C / 60°F.
There are two °Baumé scales:
The concentration is calculated using the formula:
C
F
concentration flow
P Plato
M
FR mass flow rate
° Baumé commercial (US) K
B
= 145.0
° Baumé rational K
B
= 144.3
Bé Baumé
K
B
constant used for Baumé calculations
AD_Concentration_en_140124_4000733002_R04.book Page 8 Tuesday, January 28, 2014 9:28 AM