Regulation 6 TestingI1
England, Wales and Scotland
Every cold-water meter submitted for testing shall be in a clean condition.
Meters shall be tested by passing a volume of water through them which is sufficient to rotate the pointer or roller on the verification scale through one or more revolutions and thus to eliminate the effects of cyclic distortion.
Subject to regulation 7 below, on testing with a view to passing as fit for use for trade each meter shall be tested at a minimum of three flowrates, using testing equipment or working standards—
between 0.9 times the maximum flowrate (Qmax) and the maximum flowrate (Qmax);
between the transitional flowrate (Qt) and 1.1 times the transitional flowrate (Qt); and
between the minimum flowrate (Qmin) and 1.1 times the minimum flowrate (Qmin).
On testing in relation to obliteration of the stamp or mark the inspector shall test the meter, as far as practicable, within the flowrate bands—
one-quarter to one-half the nominal flowrate (Qn); and
the transitional flowrate (Qt) to five times the transitional flowrate (Qt),
using testing equipment or working standards.
For the purposes of the performance by an inspector of his functions under the Act or these Regulations relating to inspection, testing, passing as fit for use for trade and stamping of any cold-water meter, a person submitting such a meter to an inspector or who an inspector has reasonable cause to believe has possession of such equipment for use for trade shall, if requested, provide for the inspector such assistance as the inspector may reasonably require.