Tests are conducted by virtue of the Weights and Measures Act 1985​​​​​​​​​ ​​ ​​​​​​​​Link opens in a new window ​.
Caiff profion eu cynnal dan Ddeddf Pwysau a Mesurau 1985​​​​​​​​​​​​ ​ ​​​​​​​​Dolen yn agor mewn ffenestr newydd ​.