USER MANUAL 15_________________________________________________________________________________________________________________11. Checking the balanceIn order to confirm correctness of the balance during its operation, before starting and after finishing everymeasurement series it is advised to check weighing accuracy. It can be done by weighing externalcalibration weight or other object with exactly known mass.If exceeding of allowable measurement error is affirmed, the following things should be checked:- if the balance stands stable and it is levelled,- if the balance is exposed on rapid air blasts, vibrations, rapid temperature changes or air humidity,- if the balance is not affected directly by heat source, electromagnetic radiation or magnetic field.The cause of inaccuracy can be too low temperature of the balance as well, when it was unplugged frompower supply. In this situation leave the balance switched on for several minutes in order to adjust itsinternal temperature.If none of above causes of inaccuracy occurs, calibration with external weight should be performed to thebalance. Recommended external calibration weight (to buy for additional charge) is given in technical datatable. In order to calibrate the balance with external weight in legally verified balances verification sealsshould be removed and another legal verification should be performed. In this case it is recommended tocontact authorized service centre.Calibration with external weight is described in details in chapter 17.1.12. Connecting the balance to computer or printerThe scale can be equipped with one or two serial interfaces RS232C, USB, LAN or Wi-Fi designed tocooperate:- with computer – the scale sends data after pressing key or after initiation signal fromcomputer,- with printer - sending data after pressing key or automatically after putting on/off a sampleand measurement stabilization,- with label printer – after pressing the scale sends set of instructions for label printer startingfrom label number set in special funcion LabEL.Set of send data is set using special function PrInt.The following data can be send:- Header (scale type, Max, d, e, serial number),- Operator identification number,- Successive printout number (measurement),- Identification number or product bar code,- Number of pcs (PCS function only),- Single detail mass (PCS function only),- Nett weight,- Tare (package mass),- Gross weight,- Total mass (Total function only).The way of sending data and transmission parameters is set using SErIAL special function.