XING RESTR MISSED DUE TO MISREADING CHART DME'S.

Narrative

CTR GAVE US A CLRNC TO CROSS PERRY INTXN AT FL240. THIS INTXN WAS NOT A NORMAL XING POINT. USUALLY CTR WOULD GIVE US A DME FIX S OF EKN VOR TO CROSS AT A SPECIFIC ALT. THE CAPT AND I LOOKED UP THE LOCATION OF PERRY INTXN ON HI 7/8. THE CAPT THEN PROGRAMMED THE PMS TO CROSS 33 DME S OF EKN VOR AT FL240. AT 36 DME S OF EKN DSNDING THROUGH FL250 FOR FL240 THE CTLR GAVE US A FREQ CHANGE AND TOLD US WE DIDN'T MAKE OUR XING RESTR; WHICH WAS 3 MI BEHIND US. WE RECHKED THE MILEAGE TWICE BEFORE I NOTICED THE DISTANCE OF PERRY INTXN WAS INDEED 39 MI S OF EKN. THE DME PERRY INTXN SHOWED ON HI 7/8 CHART WAS FROM PULASKI VOR AND ON THE FOLD OF THE CHART. WE COULD NOT MAKE OUT THE DISTANCE FROM PULASKI FROM THE CHART; SO THE CAPT ADDED THE DME FROM ELKINS. BTWN EKN AND PERRY INTXN THE CAPT ADDED 2 SEGMENTS ON J53 OF 23 DME PLUS 10 DME AND LOADED 33 DME AS THE XING FIX. NEITHER OF US NOTICED UNTIL WE CHKED THE CHART FOR A THIRD TIME ANOTHER SEGMENT OF J53 OF 6 DME THAT PUT PERRY INTXN ACTUALLY 39 DME S OF EKN. IT WOULD HAVE ELIMINATED THE CONFUSION HAD WE HAD A DME FIX TO CROSS FROM THE NAVAID WE WERE FLYING TO. IF THE CHART HAD DEFINED THE FIX WITH A CUMULATIVE DME INSTEAD OF INDIVIDUAL DISTANCES FOR EACH SEGMENT IT WOULD HAVE ELIMINATED CONFUSION.