Errata 1 Issued March 27, 2013 AGA Report No. 6 Field Proving of Gas Meters Using Transfer Methods Equation C.11 (Page 39): Shown in the document as ( )( ) ( ) ( ) ( )( ) ( ) ( ) ( )fi22222fi2fi22 22f f i i fi f iaaUa Ub Ucabc bcU1bcX U U 2r U U + + +Correction: ( )( ) ( ) ( ) ( )( ) ( ) ( ) ( )fi22222fi2fi22 22f f i i fi f iaaUa Ub Ucabc bcU1bcU U 2r U U+ + + +