170 AEJ-C/AES-C/PLJ-C-BA-e-162130 Servicing, maintenance, disposalBefore any maintenance, cleaning and repair work disconnect theappliance from the operating voltage.30.1 CleaningPlease do not use aggressive cleaning agents (solvents or similar agents), but acloth dampened with mild soap suds. Ensure that no liquid penetrates into thedevice. Polish with a dry soft cloth.Loose residue sample/powder can be removed carefully with a brush or manualvacuum cleaner.Spilled weighing goods must be removed immediately.30.2 Servicing, maintenance The appliance may only be opened by trained service technicians who areauthorized by KERN. Before opening, disconnect from power supply.30.3 DisposalDisposal of packaging and appliance must be carried out by operator according tovalid national or regional law of the location where the appliance is used.