This paper specifies field procedures described by international norm ISO 17123-6, to be adoptedwhen determining and evaluating the quality of rotating lasers and their ancillary equipment whenused in building and surveying measurements for levelling tasks. It will be shown analysis andstatistical tests in order to check the conformity of the equipment with the selected specifications.Also, this paper will promote the leveling systems delivered for complete quality verification ofrotating lasers, as an automated reference laboratory system.

In order to secure that tanks are confirmed with the requirements of legal metrology, tanks shall be built in accordance with sound engineering practice. The main target during the process of construction and building of tanks is the ability of tanks to protect the storage fluid. Geometrical shape, hydro-static preassure and temperature are the main influencers to the capability of the fluid, so this three parameter must be permanently controld. In accordance with international standards and methods in the scope of legal metrology and calibrated laboratories, ths paper will present an analysis of two methods for tank control. It will be shown excample of conformity assessment of the thank you results collected by Leica MS60 and Leica BLK360 scanner stations.