USER MANUAL 19____________________________________________________________________________________________________________________15.2 Calibration with external weight / calibration optionsCalibration with external weight should be performed if balance accuracy after internal calibration is notsatisfactory. Calibration weight stated in technical data table for the balance (or of better accuracy) withvalid verification certificate should be used then.Calibration of legally verified balance requires violating a mark used to protect an access toadjustment switch and results in loosing legal verification. To renew legal verification of thebalance, it is necessary to contact a service or notified body.In balances comply with verification requirements performing calibration requires changing adjustmentswitch position, which is placed behind protecting mark (sticker) of a notified body. An access to the switchis possible only after removing the mark.Before proceeding with calibration for balances comply with verification requirements, adjustment switchshould be set to ON position using thin screwdriver (the balance will display the message Pr ON).When calibration process, described on next page, is finished, the balance will display the message Pr ON.Adjustment switch should be set to OFF position using thin screwdriver (the balance will move to weighing).ON OFFAdjustmentswitch