Rice Lake Entris, Sartorius Laboratory - Manual (Page 31)

31
Density Determination
Display symbol: W
Purpose
This application program lets you determine the density of solid substances using the
buoyancy method.
Features
To enter the density of the buoyancy liquid(g/cm 3 ) at the corresponding temperature,
press b. See the next page for a table of density values for water. The factory setting
is 1 g/cm 3 .
The following formula is applied:
Density of sample =
Weight in air
———————————————————— + density of liquid
(Weight in air – weight in water)
When you start the density determination routine, the density of the liquid is displayed
briefly.
Positive and negative values can be stored for weight in air and weight in water.
The weight in water must be less than the weight in air; otherwise, an error message is
displayed.
The results can be displayed with 0 to 3 decimal places: see “Configuration". Not part of
the scope of delivery: sample holder and suspension wire.
Preparation
t Select the Density Determination application in the menu:
see “Configuration"
t Set the following parameters:
Applic. ation programs
density determination
DEC.PLCS Decimal places
none No decimal places
o
1 dec.pl.
1 decimal place
2 dec.pl.
2 decimal places
3 dec.pl.
3 decimal places
o = Factory setting
Note on using 3 decimal places:
Using three decimal places for
density can result in a high
measurement error rate because
corrections to the air density and
the density calculation sets are not
taken into account, for example.