User manual

18 PBS-A03/A04-BA-e-1213
6.3 General information
6.3.1 Density / Relative Density
Relative density follows from the weight of a specimen divided by the weight of water (at
4° Celsius) of the same volume. For this reason relative density does not have a unit.
Density equals mass divided by volume.
The application of the relative density instead of the density of a fluid in a formula
produces an incorrect result. In the case of fluids only their density is
physically meaningful.
6.3.2 Drift of Balance Display
The drifting of a balance does not influence the final result of the density determination
although the shown weight of weighing in air is affected. Accurate values are merely
required if the density of fluids is determined by means of a sinker.
When changing the ambient temperature or location, an adjustment of the balance is
necessary. For this purpose remove the density set and carry out adjustment using the
standard weighing tray (see operating instructions supplied with the balance).
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