Ohaus Density Determination Kit Manual - Manual (Page 8)

EN-5 Density Determination Kit
Place the solid in one of the two weighing pans of the bracket (2). Wait until
the weight display of the balance is stable and note the displayed weight A
(weight of sample in air).
Note for 0.1mg models
When solids with a weight greater than 20g are weighed in air, place in
the pan at the top of the holder (above 20g corner load errors may appear
on one arm in the weighing).
Remove the solid from the pan, close the draft shield doors and tare the
balance.
Place the solid after in the holder (6). Ensure that no air bubbles adhere to
the solid (remove any air bubbles with a fine brush).
Note
With solids with a density less than 1g/cm
3
the holder for floating
solids (5) must be used as it holds the solid body below the surface of the
auxiliary liquid. If the buoyancy of the solid is greater than the weight of
the holder, the holder must be weighted by placing an additional weight on
the top weighing pan of the bracket. After loading the additional weight,
tare the balance and restart the density determination procedure by
first weighing the solid in air (A) and then in the auxiliary liquid (B).
Wait until the balance has reached stability and note the displayed weight
B (weight of sample in the auxiliary liquid).
Now determine the density ρ of the solid according to the preceding
formula (Section 4.1).