State system for ensuring the uniformity of measurements. Standard reference data. n-Undecane. Thermophysical properties (density, heat capacity, enthalpy, entropy, sound velocity, thermal conductivity and viscosity coefficients) for the temperature range from the triple point to 700К at pressures up to 100 MPa
State system for ensuring the uniformity of measurements. Standard thermoelectric converters platinumrhodium/platinum of the first, second and third grades. Verification and calibration procedure