This Japanese Industrial Standard specifies the methods of measuring density and specific gravity of liquid by using pycnometers,hydrometers,vibratory densimeters,magnetic floating densimeters and the measuring method by weighing in liquid,as well as the method of securing metrological traceability in these measurements.
JIS Z 8804:2012 Referenced Document
JIS K 0557 Water used for industrial water and wastewater analysis
JIS Z 8807 Methods of measuring density and specific gravity of solid
JIS Z 8804:2012 history
2012JIS Z 8804:2012 Methods of measuring density and specific gravity of liquid
1994JIS Z 8804:1994 Methods of measuring specific gravity of liquid