PCE Instruments PCE-322A User Manual page 24

(3) A-B Graph
Double-click the left mouse button on the curve interface, and
then click to select intervals shown in the figure above,
Form A-B will show the start time, start value, end time, end value,
and the amount and average value between the selected points.
Right-click is to cancel this function;
(4) Datalogger Function
①SETUP