NCR 7878 Scale Calibration - ScanSource Technical Services

After calibrating the scale, the accuracy must be verified to assure it meets the
government requirements. This consists of a series of four tests that must be run in the
continuous sequence given.
1. Increasing Load Test
2. Over-Capacity Test
3. Decreasing Load Test
4. Shift Test
Increasing Load Test
This test checks the scale’s accuracy when incrementally adding weight to the center of
the Top Plate. Use weights that correspond to the RealScan 78 weight features.
Note: Do NOT remove any weight from the Top Plate between test steps unless
directed to do so.