A weighing scale is provided at a product processing workstation having a horizontal bed for supporting a horizontal bed window and an upright raised tower for supporting an upright tower window. A platter is mounted on the scale for joint movement therewith. The platter has a horizontal platter portion at least partly overlying the horizontal bed, and an upright platter portion at least partly overlying the raised tower. A guard on the upright platter portion overlies parts of the workstation for reducing weighing errors associated with weighing a product on the scale. The guard prevents the product from contacting and resting on the parts of the workstation and from being erroneously weighed.