1、ASTM D 1250October 1980Editorial AmplificationofVolume X-Background,Development,and Computer DocumentationThe implementation procedures(Volume X)for the evennumbered tables(Tables 6,24,and 54)do not provide a sufficientexplanation of truncating and rounding.The literal applicationof the implementati
2、on procedures would result in a code capableof producing differences from the printed tables of 1 in thefourth derived place at a rate of at least one difference inevery 240 tabulated entries.This insufficiency in the roundingand truncating procedures is a direct result of a lack of clarityin Volume
3、 X.This lack of clarity is corrected as described in the followingpages.The corrections to the implementation procedures werevalidated by an exhaustive number-by-number test of the results ofthe API master tape against the tabular representation producedin three different computer systems:Double pre
4、cision IBM,singleprecision CDC,and a module in a TI-59 calculator.These threetypes of equipment exhibited differences of 1 in the fourth placeat a rate of less than.008 percent(7 entries out of 87,000in Table 6B and less than half that rate in Table 6A).This rateis caused by the differences in the n
5、umber of places carried byeach machine and represents the maximum degree of software-machineindependence presently attainable.The rate of difference,whilenot quantitatively known,will be less than this for five significantfigure applications.Because of the nature of the calculations,itis believed th
6、at the same basic rate of difference will be foundin all of the even numbered tables.The changes outlined below are editorial corrections to theprinted Volume x and do not affect the master tape,the publishedtables,the computer listings,or the balloted standard.AD0125CVL.IX-147Step 3:b.VCF=0.9284839
7、7X-236Step 6:b.VCF=0.98114263X-237Step6:b.VCF=1.01171376X-238Step 6:b.VcF=0.92850559X-258Step 6:b.VcF=0.98074695X-260Step 6:b.VCF=0.99007803X-260Step 6:b.VCF=1,00704627X-262Step 6:b.VCF=0.98010882X-276Step 3:b.VCF=0.98108801X-277Step 3:b.VCF=1.01171377X-277Step 3:b.VCF=0.92848393X-364Step 5:b.VCF=0.
8、98071557X-365Step 5:b.VCF=1.01119225X-366Step 5:b.VC=0.92808220X-385Step 5:b.VCF=0.98806704X-386Step 5:b.VCF=0.98055297X-387Step 5:b.VCF=1.00641225X-388Step 5:b.VCF=0.97942377X-402Step 3:b.VCF=0.98050208X-403Step 3:b.VCF=1.01109395X-404Step 3:b.VCF=0.92821201APPROVED AS ANREF.NO.:ISODIS9U1.ZANe总8,裙0
9、PETROLEUMMEASUREMENTTABLESVolume Correction FactorsVolume X-Background,Development,andProgram DocumentationASTM D 1250-80ASTM Designation:D 1250API Standard:2540IP Designation:200Prepared Jointly byAMERICAN SOCIETY FOR TESTING AND MATERIALSAMERICAN PETROLEUM INSTITUTETHE INSTITUTE OF PETROLEUM1980Publication Code Number 12-412508-10AMERICAN SOCIETY FOR TESTING AND MATERIALS1916 Race St.,Philadelphia,Pa.19103
