Sartorius Cubis Series - Page 83

Cubis MSU User Manual 83
Calculation
Examples of Calculation Formulae
1) Determination of diameter for cylindrical bodies
Definition: Diameter = 2
*
V (W / (π
*
l
*
Rho))
with: V = Square root
W = weight value in g
π = 3.145
l = length of sample in cm
Rho = density of sample in g/cm
3
(e.g., 8.30000 g/cm
3
)
Input: 2
+
V (W/(π
+
100
+
8.3))
2) Determination of mass
1. Definition: m = W
*
K
with: m = Mass of sample
W = Weight value
K = Correction factor
2. Definition: K = 1 - (Rho
L
/ Rho
ST
) / 1 - (Rho
L
/ Rho
G
)
with: Rho
L
= Air density (kg/m
3
), e.g., 1.2 kg/m
3
Rho
ST
= Density of steel (8000.00000 kg/m
3
)
Rho
G
= Density of sample (e.g., 2.4000 g/cm
3
= 2400 kg/m
3
)
Input: W
+
((1-(1.2/8000))/1-(1.2/2400)
3) Air density determination with YSS45 air density kit
m
A
* W
ST
- m
ST
* W
A
____________________________
Rho
L
=
m
A
* W
ST
m
ST
* W
A
__________ - ___________
Rho
A
* 1000.0 Rho
ST
* 1000.0
with:
Rho
L
= Air density[kg/m
3
]
Rho
A
= Aluminum density [kg/m
3
]Rho
ST
= Steel density [kg/m
3
]
m
A
= Mass of aluminum m
ST
= Mass of steel
W
A
= Measured value for aluminum W
ST
= Measured value for steel
Input: ((X
+
W
a
)-(Y
+
W
b
))/(((X
+
W
a
)/(2.72762
+
1000))-((Y
+
W
b
)/(7.84231
+
1000)))