Regulation 5(a)
Every filling instrument shall be so positioned as to facilitate cleaning and testing.
The feeding device shall be designed to provide sufficient and regular flowrate(s).
The load receptor, and feed and discharge devices as appropriate, shall be designed to ensure that residual material retained after each discharge is negligible.
Instruments using the subtractive weighing principle shall be designed to ensure that residual material retained at feed from the discharge gate is negligible.
The load receptor shall provide access and facilities so that where necessary test weights or masses up to the maximum capacity can be placed in position, in a safe and secure manner. If these facilities are not a permanent fixture of the instrument, they must be kept in the vicinity of the instrument.
Manual discharge of the load receptor shall not be possible during automatic operation.
The equilibrium mechanism may be provided with detachable masses which shall be either weights in accordance with OIML requirements or purpose designed masses of any nominal value, distinguishable by shape and identified with the filling instrument.
The installation of a filling instrument shall be so designed that an automatic weighing operation will be the same whether for the purposes of testing or for use for a transaction.