GWP^® Verification includes an assessment for multiple weighing devices and comes with a unique summary report. This report gives you an overview of all your devices at one glance – including potential cost savings or quality improvements in your routine testing.

From your second GWP^® Verification onwards, you will receive the GWP^® Re-Verification Report. This includes a trend chart of your weighing device which allows you to keep track of its performance over time. This satisfies the highest demand for documentation and is also available for multiple devices (as a GWP^® Re-Verification Summary Report).

Over time, the performance of your weighing device can change due to environmental influences, wear and tear, and non-obvious damage. With routine testing performed by the user, you can check if it performs accurately enough according to your needs until the next calibration.

The safe weighing range is the range in which the balance or scale gives the most accurate results. This range lies between a scientifically calibrated lower limit (minimum weight determined through calibration) to which a safety margin is added (defined by the selected safety factor) and the maximum limit (capacity) of a balance or scale. Process quality requirements are met if the smallest net weight lies within the safe weighing range.

Since most manufacturers do not declare the lower limits of their devices, it's important to define your safe weighing range. 

The minimum weight is the smallest load that can be weighed with a certain balance or scale that still lies within your accuracy requirements (defined by the weighing tolerance in %). It is defined by the relative measurement uncertainty of the device (in %) and your defined weighing tolerance (in %).