KERN & SOHN ALT 250-4B - Manual (Page 60)

60 ALT_B-PLT_A-PLT_F-BA-e-1333
12.2 Density determination (Hydrostatic weighing)
Density is the relationship of weight [g] : volume [cm
3
]. The weight is determined by
weighing the sample in air. The volume results from the ascending force [g] of the
sample dipped in a liquid. The density [g/cm
3
] of that liquid is known (principle of
Archimedes).
The density is determined with help of the underfloor weighing device.
We recommend to switch off the automatic adjustment in the setup menu,
see chap. 11.12.
12.2.1 Density determination of solids
Prepare the balance as follows:
Switch off the balance
Remove the weighing pan and carefully turn over the weighing balance.
Suspend hook for underfloor weighing (optional)
Place weighing balance over an opening
Prepare suspension device
Fill measuring liquid e.g. water in a vessel e.g. beaker and temper it.
Calculate density:
 In weighing mode press MENU button. The master menu will be displayed.
 Use the navigation buttons  to select the menu item „Density“.
 Acknowledge using PRINT button, the current setting is displayed.
 Use the navigation buttons 
to select setting „Solid body“.
 Confirm using the PRINT button, the set density of the measuring liquid is
displayed (factory setting 1.0000 for dest. water at 20°C).
 Use the navigation buttons (see chap. 2.2.1) to enter the current density of the
measuring liquid. For water see the following density table.
 Confirm with PRINT button, the display for calcula tion of „Weight in air“ is
displayed.