1. Density and density
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Density
The density of a liquid at a given temperature is the mass per unit volume. It was formerly known as "specific mass". It is measured at 15°C and expressed in kg/m 3 .
Various methods are used to characterize it.
Direct measurement with a hydrometer, applying Archimedes' principle, as illustrated in figure 1 . The volume immersed is inversely proportional to the density. This method is covered by the following standards: NF EN ISO 3675 and ASTM D 1298 (cf. ).
Picnometer measurement, which involves weighing a given...
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Density and density
Viscosity
References
Standardization. Specifications
Association française de normalisation AFNOR
http://www. boutique.afnor.fr/
- Hydraulic transmissions – Fluids – Measurement of mineral oil filterability. Classification number : E48-690 - NF E 48-690 - 12-90
- Liquid petroleum products – Vapour pressure – Part 2: Determination of absolute vapour pressure (AVP)...
Hydraulic fluid analysis methods
Table 1 shows the equivalences between the various standards recommended by European and American standards bodies.
The numbers in the table refer to the comments below.
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