KERN PBS-A03 Operating Instructions Manual
Also see for PBS-A03: Operating instructions
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Contents
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8 PBS-A03/A04-BA-e-1213ρ = AA-B oρρ = mV3 Principle of Density DeterminationThree physical magnitudes are the volume and the mass of bodies as well as thedensity of matter. In density mass and volume are related.Density [ ρ ] is the relation of mass [ m ] to volume [ V ].SI-unit of density is kilogram divided by cubic meter (kg/m³). 1 kg/m³ equals the density ofa homogenous body that, for a mass of 1 kg, has the volume of 1 m³.Additional frequently applied units include:1 gcm 3,1 kgm 3, 1 glThe application of this density determination set in combination with the KERN PBS/PBJbalances provides fast and safe determination of solids and fluids. Our set uses the"Principle of Archimedes" to determine density:BUOYANCY IS A FORCE. IT AFFECTS A BODY THAT IS IMMERSED INTO A FLUID. THE BUOYANCYOF THE BODY EQUALS THE WEIGHT FORCE OF THE DISPLACED FLUID. THE FORCE OFBUOYANCY ACTS VERTICALLY UPWARDS.Thus, density is calculated according to the formulae below:Determining density of solid bodiesOur balances enable weighing of solids in air [ A ] as well as water [ B ]. If the density ofthe buoyancy medium is known [ ρo ] the density of the solid [ ρ ] is calculated as follows:ρ = density of sampleA = weight of the sample in airB = weight of sample in measuring fluidρo = density of measuring fluid |
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