• Legalization is a set of activities that includes checking, stating and certifying with a legalization proof that the measuring instrument meets the metrological requirements specified in standards and legal acts
  
• Proof of legalization is the verification mark placed on the measuring instrument and an additional certificate of legalization

• The deadlines are specified in the Regulation of the Minister of Entrepreneurship and Technology of March 22, 2019 on legal metrological control of measuring instruments (Journal of Laws 2019 item 759)
  
• For example, the validity period of legalization for non-automatic scales is 2 years

• The scales that are subject to legalization are defined by the ACT of May 11, 2001. Law on Measures (Chapter 3, Art. 8.1.) Measuring instruments that are used, among others, in the protection of health, life and the environment, in the protection of public safety and order, in the collection of fees, taxes and other budget charges and the determination of discounts, contractual penalties, wages and compensation or in commercial trade are subject to legal metrological control.

• Legalization consists in checking and certifying that the measuring instrument meets the requirements of legal metrology. It is performed periodically in accordance with applicable regulations

• Conformity Assessment consists in verifying and confirming the compliance of a given product with the legal regulations specified in EU directives on that particular product

• The Conformity Assessment is carried out once, before the product is placed on the market. After the execution of the Conformity Assessment, a Certificate of Conformity or a Certificate of Conformity is issued

• Calibration involves checking the metrological properties of a given instrument and consists in comparing, under established conditions, the readings of the checked instrument with the readings of an appropriate measurement standard. It determines the accuracy of the balance, which allows to assess its suitability and technical condition

• On the basis of the test results, a calibration certificate is issued, which gives the deviation of the indications of the calibrated instrument from the actual value

• Calibration is carried out at set intervals in accordance with procedures within the given company

The difference relates to the position of the platform relative to the level of the ground on which the scale is located:

RECESSED SCALES

• The platform is located in the plane of the ground where the scale is located, i.e. flush with it, it takes up less space, it is easy to drive onto the scale

OVERRUN SCALES

• The platform is located above the ground on which the scale is located and requires equipping the scale with invasions, it is easier to access the space under the scale and keep it clean