Type PSU4000, Viscosity Reference Standard

Paragon Scientific Ltd. certifies that the kinematic viscosity measurements at 20 °C, 23 °C & 25 °C were made in accordance with ASTM D2162 using long capillary Master Viscometers. See also ASTM D445, D446, D2171, ISO 3104, ISO 3105, IP 71 Sections 1 and 2 and IP 222. The viscosity data reported is based on the primary standard of pure water at 20 °C (ITS-90) having a value of 1.0034 mm2/s (cSt) ± 0.17%, as adopted by NIST, ASTM, IP and ISO (ISO 3666). Density measurements at 20 °C, 23 °C & 25 °C have been made in accordance with ASTM D1480. The dynamic viscosities at 20 °C, 23 °C & 25 °C were calculated from these measured values. Temperature measurements were made using thermometers meeting the requirements specified in ASTM D2162 & ASTM D1480, which have a current calibration traceable to recognised National Standards, the National Physical Laboratory (NPL), National Institute Standards and Technology (NIST) and other recognised national standards laboratories. The calibrations of this product are traceable to NIST.