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Operating instructions
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English (EN)
V
Vapor pressure
This term refers to the pressure exerted by the vapor of a material (solid or liquid) in an
enclosed container. The vapor is in equilibrium with the solid or liquid phase of the
material. The vapor pressure increases when the temperature increases. Each pure liquid
has a vapor pressure of 1013 hPa (mbar) at boiling point. Volume errors caused by high
vapor pressure can be reduced by prewetting the tip.
Viscosity
Viscosity describes the viscidity of liquids and suspensions. The dynamic or absolute
viscosity is indicated in Pa·s or in mPa·s. In older literature, the unit P or cP is used
(1 mPa·s corresponds to 1 cP). At ambient temperature, a 50 % glycerol solution has a
viscosity of approx. 6 mPa·s. As the glycerol concentration increases, viscosity increases
considerably. Absolutely anhydrous glycerol has a viscosity of approx. 1480 mPa s at
ambient temperature.
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