Calibration weights for digital scales are also manufactured to precise standards and must be handled carefully. Importantly, these test weights must also be recalibrated every six months if used intensively; otherwise annually.
Calibration weights for digital scales are key elements to ensure, in the simplest sense, that you get what you pay for. For many of us this is exemplified by visits to the deli counter in the supermarket. We want assurance that the weight shown on the scale is accurate.