KERN ABT series Operating Instruction

Also see for ABT 100-5M: Operating instructions Operating instruction Operating instructions

Contents

ABT-BA-e-1312208 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 for the first commissioning, after eachchange of location as well as in case of fluctuating environment temperature. To re-ceive accurate measuring values it is also recommended to adjust the balance peri-odically in weighing operation.Observe stable environmental conditions. Stabilisation requires a warm-up period of1 or 4 hours (for models d = 0.01 mg). Ensure that there are no objects on theweighing plate.8.1 Automatic adjustment via PSCThe default setting for balances of the series ABT ("PSC ON") prompts automaticadjustment via the PSC function.The moment a change in temperature is detected this function uses the internal tareweight to carry out fully-automatic adjustment with the help of a temperature sensor.If PSC is left ON, when there is a temperature change that would influence sensitivi-ty, span calibration executes automatically to maintain the sensitivity of the balance.Adjustment in weighing mode is carried out automatically under the following condi-tions:(1) If a change in environmental temperature (0.5 °C) occurs;(2) When about four hours has passed since the previous calibration.(3) When the balance is switched from standby status to weighing modeand condition (1) or (2) has been met.(4) When balance was disconnected from the mains.If one of the above conditions was met in weighing mode, the weight symbol flashesfor about two minutes in order to notify the pending adjustment; afterwards the dis-play will show "PSC run". During operation, the display will automatically change andthe motor sound of the weight loading system is heard. In order to ensure properPSC operation, prevent vibrations and air flow. As soon as the display in grams re-appears after completing adjustment via PSC, the balance returns to weighing mode.The sensitivity before and after adjustment is slightly different. Also, no measure-ments can be made during adjustment. To prevent a start-up of adjustment during ameasuring process you have to actuate the [ON/OFF] key as soon as the weightsymbol starts flashing. This will interrupt automatic adjustment.