Regulation 18 Piston provers
(1)
A piston prover shall have been tested over its full working range within 12 months before use.
(2)
The error on a piston prover shall not exceed the limits of error shown in Schedule 2 to these Regulations.
A piston prover shall have been tested over its full working range within 12 months before use.
The error on a piston prover shall not exceed the limits of error shown in Schedule 2 to these Regulations.