Calibration operations provide you with a certificate demonstrating the traceability of your standards with respect to the international system of units. The LNE National Metrology Laboratory safeguards the preservation, development and improvement of France's mass unit as well as its transfer to industry.
List of sites and scopes available on www.cofrac.fr
The oils are delivered in 500-ml, colored glass flasks with an indication of the kinematic viscosity value expressed in mm2/s for the requested calibration temperature(s). The oils must be conserved in their original flask, protected from both heat and light.
Kinematic viscosity is determined by using calibrated capillary viscometers. This calibration step may be performed at between -40° and +150°C.
The relative uncertainty (k=2) depends on the actual kinematic viscosity range:
To calculate the dynamic viscosity of a fluid, a determination of the fluid mass density relies on the pycnometric method. The calibration step may be performed at between 10° and 70°C.
Dynamic viscosity is the product of kinematic viscosity and the mass density of the oil.
The relative uncertainty (k=2) depends on the actual dynamic viscosity range: