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2. Before commencing material testing of the filling machine, the inspector shall satisfy himself that the arrangements to be used for determining the weight of material used in test loads selected in accordance with paragraph 3(1)(a) below will give weight determinations such that in respect of each test load the weight determination shall be to an accuracy equal to or better than one-fifth of the limits of error prescribed in respect of that load.
3.—(1)
(a)select 20 separate consecutive test loads;
(b)determine the weight of the material in each test load using the arrangements referred to in paragraph 2 above;
(c)
(2) The difference referred to in sub-paragraph (1)(c) above shall constitute the error for the purposes of test A in calculating the prescribed limits of error in excess set out in columns 3 and 5 of Table 1 in Schedule 3 to these Regulations in relation to the description of machine set out in column 1 other than filling machines for use only for weighing potato crisps and other similar products commonly known as snack foods.
(3) The total of the differences referred to in sub-paragraph (1)(c) above in relation to each test load shall constitute the error for the purposes of test A in calculating the prescribed limits of error in excess set out in columns 3 and 5 of Table 1 in Schedule 3 to these Regulations in relation to filling machines for use only for weighing potato crisps and other similar products commonly known as snack foods.
(4) Where a filling machine is constructed to feed and weigh material of more than one purported weight, the inspector shall select two groups of 20 separate consecutive test loads, one group of test loads each made up as nearly as practicable equal to the minimum load and one other group.
4.—(1) Subject to sub-paragraph (3) below, if in the course of performing test A the weight of any test load exceeds the purported weight by more than:
(a)one-half per cent., or the appropriate amount per cent. given in column 3 of Table 1 in Schedule 3 to these Regulations for weighing specified materials, of the purported weight in relation to passing as fit for use for trade, or
(b)one per cent., or the appropriate amount per cent. given in column 5 of the said Table 1 for weighing specified materials, of the purported weight in relation to the obliteration of the stamp,
the filling machine shall be subjected to the further test B that is to say the inspector shall remove that single piece or item of material appearing to him to be the largest piece or item at the top of that test load, and the inspector shall then re-determine the weight of material used in each such test load using the arrangements referred to in paragraph 2 above and ascertain the difference between the weight of material so determined and the purported weight.
(2) The difference referred to in sub-paragraph (1) above shall constitute the error for the purposes of test B in calculating the prescribed limits of error set out in columns 4 and 6 of Table 1 in Schedule 3 to these Regulations.
(3) Sub-paragraph (1) above shall apply only to filling machines of the following description—
(a)with a maximum capacity of 110 kg or less, used only for weighing solid fuel;
(b)with a maximum capacity of 55 kg or less, used only for weighing vegetable produce;
(c)with a maximum capacity of less than 5 kg, used for weighing all other materials except potato crisps and other similar products commonly known as snack foods.
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