25MAINTENANCENorTronic® CalibrationYour NorTronic® has been supplied with a certificate of calibration. To maintain the specified accuracy it isrecommended that the NorTronic® is recalibrated at least once per year. Re-calibration should be carried outat Norbar or by a Norbar approved agent, where all the facilities to ensure the instrument is functioning atmaximum accuracy are available.IMPORTANT: DO NOT REMOVE SIDE PANELS; THERE ARE NO CALIBRATION SETTINGS INSIDE.Battery ReplacementThere are 2 types of batteries in this product. 3 standard AA batteries for powering the NorTronic® (whichcan be removed by the user and recharged when necessary) and a coin cell to power the clock.The coin cell should only be replaced by Norbar or a Norbar approved agent.RepairRepair should be carried out at Norbar or by a Norbar approved agent, where all the facilities to ensure theNorTronic® is functioning at maximum accuracy are available.CleaningDo not use abrasives or solvent based cleaners.Product DisposalThis symbol on the product indicates that it must not be disposed of in the general waste.Please dispose of according to your local recycling laws and regulations.Contact your distributor or see the Norbar web site (www.norbar.com) for further recyclinginformation.Battery DisposalThis product contains 2 types of Batteries. Only dispose of batteries at end of product life.Batteries contain substances that can have a negative effect on the environment and human health.The crossed-out wheeled bin means that batteries must NOT be disposed of in the general waste.All batteries must be disposed of at a local waste battery collection point.The batteries do NOT contain mercury (Hg), cadmium (Cd) or lead (Pb). If the battery substances exceed thelegal limits the battery would be marked with Pb, Cd or Hg.