Input and Computational Requirements VCF values are rounded to 5 unit(s) of precision. Density values must be entered using 1 unit(s) of precision. Temperature values must be entered using 2 unit(s) of precision. Enter 0 bar for pressure when using static measurement. Otherwise, enter the actual value (i.e dynamic measurement). For more information, please refer to the latest edition of API MPMS Chapter 11.1 / ASTM 1250 / ASTM D4311 /ASTM D 1555