Internal calibration allows the scale or balance to calibrate itself, often automatically without needing manual input from its users. There are various degrees and technologies used to ensure precision that change depending on model, make and price range.
Some balances even allow you to set calibration at specific times or intervals (for example, during lunch or in the morning before people come to work, or even every couple of hours). They also allow for the scale or balance to be calibrated with a single button press. These balances have built-in calibration weights, often motor driven.
Here at DX Resources, we offer you a full service of internal calibration.