Weights and Measures Regulations (C.R.C., c. 1605)

69 The installation and use of every device for use in trade shall conform to instructions for installation and use issued by the manufacturer or importer, unless there is an apparent contradiction between such instructions and the specifications set out in this Part or established by the Minister, in which case the specifications set out in this Part or established by the Minister shall prevail.

70 If the use of a device in any manner or for any purpose is prohibited in either the certificate issued at the time of the most recent examination performed under the Act or in the notice of approval of the device issued under section 3 of the Act or under a previous enactment, the device shall, throughout the period of its use in trade, have closely associated with it or prominently displayed on it a readily legible sign or notice setting out the manner or purpose of use that is prohibited.

DIVISION IIWeights

Interpretation

71 In this Division, weight means a weight for use in trade.

Design, Composition and Construction

72 Weights shall be composed of any metal or metals not softer than brass, except that weights of less than one gram in the metric system or less than 10 grains in the Canadian system shall be composed of corrosion resistant metal.

73 Weight reducing holes shall be so made as to prevent the retaining of adjusting lead or foreign matter and the entire surface of weights shall be smooth and reasonably free from grooves or indentations in which foreign matter could accumulate.

74 If a weight is equipped with a ring, the ring shall not be removable.

75 Cast iron weights shall be painted with at least one coat of suitable waterproof metal sealer or primer, and may be also painted with a finish coat if the resulting aggregate coat is thin and durable.

76 When a cast iron weight is painted, it shall be calibrated after it receives the final paint coat.

77 All adjusting holes intended to hold lead in a weight shall be undercut or so made as to ensure that the lead is securely held in place and in no case shall the lead project beyond the surface of the weight.

78 At the time of an examination for the purposes of paragraph 8(b) or 26(1)(c) of the Act, not more than two adjusting holes shall be provided in a single weight and at every examination there shall be lead in each adjusting hole sufficient to accept an examination mark.

79 A counterpoise weight the principal section of which is too thin to hold an adjusting hole shall have a boss or lug of a size sufficient to hold the adjusting hole.

80 A weight with a cavity for loose adjusting material that is fitted with a screw top or plug shall be provided with a positive means of locking, other than by friction, the top or plug to the body of the weight.

81 Weights shall be constructed to represent

• (a) multiples or submultiples of the kilogram, gram or milligram having values equal to 1, 2 or 5 × 10ⁿ units, where “n” represents a whole number, whether positive, negative or equal to zero;

• (b) multiples or decimal submultiples of the pound or troy ounce;

• (c) multiples or binary submultiples of the pound or ounce; or

• (d) multiples or decimal submultiples of the grain.

Performance

82 When a weight that has a marked weight set out in column I of an item in a table to sections 84 to 88 is tested for acceptance limits of error in relation to a local standard weight, the weight is considered to be within the acceptance limits of error if its actual weight determined by the test

• (a) is not less than its marked weight; and

• (b) does not exceed its marked weight by an amount in excess of the amount set out in Column II of that item.

83 When a weight that has a marked weight set out in column I of an item in a table to sections 84 to 88 is tested for in-service limits of error in relation to a local standard weight, the weight is considered to be within the in-service limits of error if its actual weight determined by the test

• (a) is not more than its marked weight by an amount in excess of the amount set out in Column III of that item; and

• (b) is not less than its marked weight by an amount in excess of the amount set out in Column IV of that item.

• 84 (1) Subject to subsections (2) and (3) and sections 85 and 87, the limits of error set out in the following table apply to all weights that are multiples or submultiples of the gram, commonly called metric weights:

  	Column I	Acceptance Limits of Error	In-Service Limits of Error
  		Column II	Column III	Column IV
  Item	Marked Weight	Over Marked Weight	Over Marked Weight	Under Marked Weight
  	Milligrams	Milligrams	Milligrams	Milligrams
  1	10	0.5	0.4	0.2
  2	20	0.6	0.6	0.3
  3	50	1	1	0.5
  4	100	1.5	1.5	0.8
  5	200	2	2	1
  6	500	3	3	1.5
  	Grams
  7	1	5	5	2.5
  8	2	7	7	3.5
  9	5	10	10	5
  10	10	15	15	8
  11	20	20	20	10
  12	50	30	30	15
  13	100	50	50	25
  14	200	70	70	35
  15	500	100	100	50
  	Kilograms	Grams	Grams	Grams
  16	1	0.20	0.20	0.10
  17	2	0.40	0.40	0.20
  18	5	1	1	0.50
  19	10	1.70	1.70	0.85
  20	20	3.50	3.50	1.80
  21	50 or over	0.015% of marked weight	0.015% of marked weight	0.0075% of marked weight

• (2) The limits of error for weights for use in conjunction with equal-arm pan-over-beam scales are twice the limits of error set out in the table to subsection (1).

• (3) The limits of error for weights for use as ratio weights where the ratio is in excess of 100:1 are one-half the limits of error set out in the table to subsection (1).

85 The limits of error set out in the following table apply to weights in special multiples of the gram that are approved only for use in conjunction with scales designed to be used for determining the butter-fat content of milk and the moisture content of butter: