KERN 440 Operating Instructions Manual

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Contents

440-BA-defsi-0634 396.5 Connecting peripheral equipmentThe balance must be disconnected from the mains before connecting or disconnect-ing additional equipment (printer, PC) to or from the data interface.Only use KERN accessories and peripheral equipment with your balance. Thesehave been ideally coordinated to your balance.6.6 Initial start-upA warm-up time of 5 minutes stabilises the measured values after switching on.The accuracy of the balance depends on the local acceleration of the fall.Please be sure to observe the information in the chapter on adjusting.6.7 AdjustmentAs the acceleration value due to gravity is not the same at every location on earth,each balance must be coordinated – in compliance with the underlying physicalweighing principle - to the existing acceleration due to gravity at its place of location (only if the balance has not already been adjusted to the location in the factory). Thisadjustment process must be carried out during the initial start-up, after change in lo-cation and variation of surrounding temperature. It is also recommendable to adjustthe balance periodically during weighing operation in order to obtain exact measuredvalues.6.8 AdjustingUsing a precision weight, the accuracy of the balance can be checked at any timeand adjusted.Adjustment procedure:Check that the surrounding conditions are stable.A short warm-up time of about 5 minutes are recommended for stabilisation.Switch the balance on by pressing the key, then wait until “0“ is indicated.Press the key and hold. After the acoustic signal is heard “CAL“ will appear onthe display for a brief period. The exact size of the selected adjusting weight flasheson the display following this (capture 8.3 „Select the adjusting weight“). Now placethe adjusting weight in the middle of the weighing plate.Now operate the key. Shortly after “CAL F“ appears, and then the automatic re-turn to the normal weighing mode will follow. On the display the weight of the adjust-ing weight appears.In case of an adjusting error or a wrong adjusting weight “CAL E“ will appear. Repeatthe adjusting procedure.Keep the adjusting weight near the balance. Daily verification of the balance accu-racy is recommended for quality assured applications.