SCHEDULE 2ANNEX I OF COUNCIL DIRECTIVE OF 20TH JUNE 1990 ON THE HARMONISATION OF THE LAWS OF MEMBER STATES RELATING TO NON-AUTOMATIC WEIGHING INSTRUMENTS
DESIGN AND CONSTRUCTION
General requirements8
8.1
Design and construction of the instruments shall be such that the instruments will preserve their metrological qualities when properly used and installed, and when used in an environment for which they are intended. The value of the mass must be indicated.
8.2
When exposed to disturbances, electronic instruments shall not display the effects of significant faults, or shall automatically detect and indicate them.
Upon automatic detection of a significant fault, electronic instruments shall provide a visual or audible alarm that shall continue until the user takes corrective action or the fault disappears.
8.3
The requirements of 8.1 and 8.2 shall be met on a lasting basis during a period of time that is normal in view of the intended use of such instruments.
Digital electronic devices shall always exercise adequate control of the correct operation of the measuring process, of the indicating facility, and of all data storage and data transfer.
Upon automatic detection of a significant durability error, electronic instruments shall provide a visual or audible alarm that shall continue until the user takes corrective action or the error disappears.
8.4
When external equipment is connected to an electronic instrument through an appropriate interface the metrological qualities of the instrument shall not be adversely influenced.
8.5
The instruments shall have no characteristics likely to facilitate fraudulent use, whereas possibilities for unintentional misuse shall be minimal. Components that may be dismantled or adjusted by the user shall be secured against such actions.
8.6
Instruments shall be designed to permit ready execution of the statutory controls laid down by this Directive.