IBM 727 Manual Of Instruction page 112

V e r t . Cal . 20 V o lts/M a jo r Div . H o r . C a l. 4 M sec/M ajor Div .
FIG URE 26. REVERSE M A G N ET TRA N SFER
VER. C A L r^ 5 0 M AMPS/MAJOR DIV. HOR. CAL-r-^ 5 M SEC/M AJOR DIV
(TH IS IS 0.5 VOLTS/MAJOR DIV.)
FIG URE 27. M O V IN G C O IL WAVE FORM