A combination scale, comprising: a dispersing feeder configured to receive and convey articles to be weighed to its periphery; a plurality of linear feeders disposed around the dispersing feeder and configured to deliver the articles received from the dispersing feeder and discharge the articles from delivery terminal ends thereof; a plurality of feeding hoppers configured to temporarily store therein the articles discharged from the delivery terminal ends of the linear feeders and discharge the articles downward; a plurality of weighing hoppers configured to temporarily store therein the articles discharged from the feeding hoppers and discharge the articles; a plurality of weight sensors configured to detect weights of the weighing hoppers; a combinatorial computation unit configured to correct weight values obtained from weight signals of the weight sensors based on zero-point correction values respectively associated with the weighing hoppers, the combinatorial computation unit being further configured to calculate weight values of the articles stored in the weighing hoppers and execute combinatorial computations based on the calculated weight values of the articles; and a control device configured to control the weighing hoppers based on a result obtained from the combinatorial computations, the control device being further configured to control the dispersing feeder, the linear feeders, and the feeding hoppers, the combination scale characterised by further comprising: a dummy run mode setting unit configured to set a dummy run mode for a dummy run of the combination scale to be performed without actually feeding the combination scale with the articles to be weighed; and a virtual weight value setting unit configured to set virtual weight values of the articles assumed to be stored in the weighing hoppers that are actually empty, wherein during the dummy run mode, the combinatorial computation unit calculates the weight values of the articles by correcting the weight values obtained from the weight signals of the weight sensors based on corrected zero-point correction values, the corrected zero-point correction values being obtainable by correcting the zero-point correction values initially provided based on the virtual weight values. a dispersing feeder configured to receive and convey articles to be weighed to its periphery; a plurality of linear feeders disposed around the dispersing feeder and configured to deliver the articles received from the dispersing feeder and discharge the articles from delivery terminal ends thereof; a plurality of feeding hoppers configured to temporarily store therein the articles discharged from the delivery terminal ends of the linear feeders and discharge the articles downward; a plurality of weighing hoppers configured to temporarily store therein the articles discharged from the feeding hoppers and discharge the articles; a plurality of weight sensors configured to detect weights of the weighing hoppers; a combinatorial computation unit configured to correct weight values obtained from weight signals of the weight sensors based on zero-point correction values respectively associated with the weighing hoppers, the combinatorial computation unit being further configured to calculate weight values of the articles stored in the weighing hoppers and execute combinatorial computations based on the calculated weight values of the articles; and a control device configured to control the weighing hoppers based on a result obtained from the combinatorial computations, the control device being further configured to control the dispersing feeder, the linear feeders, and the feeding hoppers, the combination scale characterised by further comprising: a dummy run mode setting unit configured to set a dummy run mode for a dummy run of the combination scale to be performed without actually feeding the combination scale with the articles to be weighed; and a virtual weight value setting unit configured to set virtual weight values of the articles assumed to be stored in the weighing hoppers that are actually empty, wherein during the dummy run mode, the combinatorial computation unit calculates the weight values of the articles by correcting the weight values obtained from the weight signals of the weight sensors based on corrected zero-point correction values, the corrected zero-point correction values being obtainable by correcting the zero-point correction values initially provided based on the virtual weight values. a dummy run mode setting unit configured to set a dummy run mode for a dummy run of the combination scale to be performed without actually feeding the combination scale with the articles to be weighed; and a virtual weight value setting unit configured to set virtual weight values of the articles assumed to be stored in the weighing hoppers that are actually empty, wherein during the dummy run mode, the combinatorial computation unit calculates the weight values of the articles by correcting the weight values obtained from the weight signals of the weight sensors based on corrected zero-point correction values, the corrected zero-point correction values being obtainable by correcting the zero-point correction values initially provided based on the virtual weight values.