Rice Lake Secura - Quintix and Practum Series - User Manual - Manual (Page 48)

48
Density
User Manual for Secura, Quintix, Practum
Density
Purpose: The density of solids can be determined using the buoyancy method. The density
is determined using Archimedes' Principle. The upward buoyant force exerted on
a body immersed in a fluid is equal to the weight of the fluid the body displaces.
Calculation Basis for Density Determination
Density determination using the buoyancy method is based on the following
formula:
l Density of sample (rho)
l
fl
Density of buoyancy liquid
W
a
Weight of sample in air
W
fl
Weight of sample in liquid
Buoyancy: l = (W
a
/ (W
a
- W
fl
)) * l
fl
Prerequisites: A Sartorius density determination kit is required for this function:
– for analytical balances YDK03
– for precision balances YDK04.
Mount the density determination kit on the balance and prepare it as described in
the kit instructions.
t Select the Menu key in any application.
t
Select the Density symbol in the menu.
Max 220 g d=0.0001 g
0.0000
Density of liquid
g/cm 3
0.9982
y The Density application appears.
The density of the buoyancy liquid is displayed under Density of liquid .
The following values are preset for distilled water at various temperatures:
– 0.99823
g/cm 3 at 20°C
– 0.99802 g/cm 3 at 21°C
– 0.99780 g/cm 3 at 22°C
Additional density values can be found in the table on page 50.