Different measuring instruments are present in daily use. These are all devices intended for measuring, as for example scales at markets and in shops, electrical counters, water meters, taximeters, manometer for blood pressure measuring, devices for measuring liquid fuels, master clocks at telephone exchanges and similar.
It is important to know that all of these measuring instruments have to comply with prescribed metrological requirements and legal procedures. Those procedures relate to so called verification, which includes examination and marking of instruments.
So, all of the new measuring instruments, that haven't been verified before, have to be verified i.e. marked prior to being placed on the market.
Mark, that has to be placed at a visible spot on the measuring instrument, is commonly of an ellipsoid shape, containing five digit serial number. Two last digits mark the year of the measuring instrument's verification. Mark stickers that are around the edge divided into months, can be also used.
Verifications are conducted regularly. Some measuring instruments, as for example taximeters, are verified once a year. For electric counters, used in households, verification deadline is 12 years. Water meters are verified every fifth year, and weighing instruments, depending on a kind, once in one or two years.
If the examination shows that the measuring instrument doesn't comply with the prescribed metrological requirements, marking is denied.
All of the verifications are performed by the Bureau of Metrology, at the request for verification of a measuring instrument.
Requests can be submitted every working day from 8 am until 2 pm.
Information on number and type of examined, verified and denied measuring instruments are given in the table.
Table containing data on processed request
for the period 1 January 2018 to 31 December 2018