OHAUS TAJ Manuel D'instructions page 15

TAJ Carat / Gold Balances EN-7
APW Enhancement - Since the weight of each piece may vary slightly, APW
Enhancement (when enabled - Cnt.Enh) may be used to increase the accuracy of the
count. The Average Piece Weight is automatically recalculated if the next stable weight
is less than or equal to 2 times the original sample weight. Enhancement will then
continue provided that each additional weight is less than or equal to the previous
weight. The display shows [APU.Enh] each time the APW is recalculated.
Establish new APW -Press and hold Unit until "PC" blinks.
Count - Press Zero button. Place the quantity to be counted on the pan.
Exit - Press and hold Mode until the prior weighing unit is shown.