KROHNE CORIMASS MFC 85 EN - Manual (Page 4)

4
2. Definitions
2.1 Concentration by Volume (C
V
)
A mixture with total volume, V
T
, contains a volume, V
S
, of one component. The
concentration by volume, C
V
, of that component is:
Note: V
S
, V
T
and hence C
V
will vary with temperature.
2.2 Concentration by Mass (C
M
)
A mixture or solution with total mass, M
T
, contains mass, M
S
, of one component. The
concentration by mass, C
M
, of that component is:
Masses M
S
, M
T
and hence C
M
do not vary with temperature.
2.3 Brix
Brix is the concentration by mass of sucrose in pure water. A 10% solution has a Brix value
of 10
°
Brix. A solution’s Brix value does not vary with temperature. If a 100 g solution
contains 10 g of sucrose it will still contain 10 g whether the temperature is 10, 20 or 30
°
C
The Brix option provides the following:
Sucrose Concentration C
BX
°
BRIX
Sucrose Mass Flow or BRIX RATE
C
BX
is defined by:
Where: M
SUCROSE
= mass of sucrose
M
WATER
= mass of water
The BRIX RATE, (mass flow rate of sucrose) is given by :
where: m is the mass flow of the total solution.
2.4 Baumé
This is another concentration scale for aqueous sucrose. It is based on the specific gravity of
sucrose solutions,
d
1 5
1 5 , relative to water at 60
°
F, measured at 60
°
F. The concentration is
then given by:
Conc K
d
Be
B
.
= −






1
1
15
15
There are actually two Baumé scales:
Baumé Commercial (US) K
B
= 145.0
Baumé Rational K
B
= 144.3
C
M
=
Ms
M
T
×
100%
C
BX
=
C
V
=
V s
V
T
×
100%
M
SUCROSE
M
SUCROSE
+ M
WATER
∗
100
BRIX RATE = C BX
100
∗ m
·
·