"JJF 1316-2011 Blood Viscosity meter calibrating specification" is a national measurement technical specification, released on September 20, 2011 and implemented on December 20, 2011. This specification is applicable to blood Viscosity meters with a constant shear rate, a shear rate of 1s~ 200s, and a shear stress of 10mPa~ 1000mPa. It is used to calibrate the dynamic viscosity of whole blood and plasma. The specification specifies the measurement characteristics, calibrating conditions, calibrating items and methods of the instrument, including the calibration requirements for indicators such as plasma viscosity and measurement error of whole blood viscosity indication and Repeatability. Viscosity meters are calibrated to ensure accurate and reliable measurement results for clinical diagnosis and scientific research.