Weight calibration mass accuracy class F2 GOST 7328−2001. Designed for calibration of laboratory balances ll accuracy class. In the current scales typically provide two types of calibration:
1. Linear — uses three calibration weight(1 / 3 of the LEL, 2 / 3 of the LEL and LEL) or close to it. If such a calibration is provided in the weights, it is recommended to improve the accuracy of weighing.
2. Standard — used one calibration weight, but not less than 2 / 3 of the LEL. The highest accuracy is achieved by calibration weight equal to the LEL.