EN-10 PX Series BalanceAPW Optimization:Improving counting accuracy by re-calculating the piece weightautomatically as parts are added.APW Optimization occurs only when the number of piecesadded to the pan is between one and three times the numberalready on the pan.Print Settings:Changing printing setup. See Section 7 for more information.4.3 Percent WeighingNote: Before using any application, be sure the balance has been leveled and calibrated.Use Percent Weighing to display the weight of a test object as a percentage of a pre-established referencesample.The default (or last) reference weight is displayed.Percent Weighing1. Press and hold the Function / Mode button untilPercent Weighing appears.2. After confirmation by pressing Yes, the message"Clear reference?" will appear on the screen.3. Press Yes, and then the message "Place sample" willdisplay.4. Place the reference sample on the pan to display theweight. When the reading is stable, the * will appear.5. Press the Function / Mode button so that the weightof the reference sample is stored in memory. Thedisplay will show 100%.