Consolidated Statutes and Regulations
Enabling statute: Weights and Measures Act
Weights and Measures Regulations
Disclaimer: These documents are not the official versions (more).
Source: http://laws.justice.gc.ca/en/W-6/C.R.C.-c.1605/253877.html
Regulation current to September 15, 2006
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PART XV LIMITS OF ERROR FOR PRECIOUS METALS AND OTHER COMMODITIES OF COMPARABLE VALUE THE QUANTITY OF WHICH IS STATED IN METRIC UNITS OF MASS
| Column I
| Column II
|
|---|
Item
| Stated Quantity
| Limits of Error
|
|---|
|
|---|
|
grams
|
milligrams
| 1.
| up to and including 30
| 12.5
| 2.
| 50
| 17
| 3.
| 100
| 30
| 4.
| 200
| 56
| 5.
| 300
| 81
| 6.
| 500
| 131
| 7.
| 1 000
| 240
| 8.
| 1 500
| 350
| 9.
| 2 000
| 425
| 10.
| 3 000
| 575
| 11.
| 5 000
| 900
| 12.
| 6 000
| 1 050
| 13.
| more than 6 000
| 0.0175% of the stated quantity
|
Where a quantity is not listed in column I of this Part, the limits of error for that quantity shall be determined by linear interpolation.
PART XVI LIMITS OF ERROR FOR PRECIOUS METALS AND OTHER COMMODITIES OF COMPARABLE VALUE THE QUANTITY OF WHICH IS STATED IN CANADIAN UNITS OF MASS OR WEIGHT
| Column I
| Column II
|
|---|
Item
| Stated Quantity
| Limits of Error
|
|---|
|
|---|
|
troy ounces
|
grains
| 1.
| up to and including 1
| 0.2
| 2.
| 2
| 0.3
| 3.
| 5
| 0.7
| 4.
| 10
| 1.3
| 5.
| 20
| 2.5
| 6.
| 50
| 5.6
| 7.
| 100
| 9.4
| 8.
| 200
| 16.8
| 9.
| more than 200
| 0.0175% of the stated quantity
|
Where a quantity is not listed in column I of this Part, the limits of error for that quantity shall be determined by linear interpolation. SOR/80-429, s. 3; SOR/89-570, ss. 4, 6(F); SOR/2005-297, ss. 23 to 37.
| Column I
| Column II
|
|---|
Item
| Number of Units
in the Lot
| Minimum Number of Units
in the Sample
|
|---|
|
|---|
1.
| from 2 to 10
| All the units in the lot
| 2.
| from 11 to 128
| 25% of the units in the lot, rounded up to the next whole number, but not less than 10
| 3.
| from 129 to 4 000
| 32
| 4.
| from 4 001 to 8 000
| 64
| 5.
| from 8 001 to 12 000
| 96
| 6.
| more than 12 000
| 125
|
PART II FORMULA FOR DETERMINING THE WEIGHTED AVERAGE QUANTITY OF THE UNITS IN A SAMPLE For the purposes of paragraph 52(4)(a), the formula for adjusting the sample mean to determine the weighted average quantity of the units in the sample is as follows:
X
a = x + s(t÷√n)*
where
X
a
is the weighted average quantity of the units in the sample
x
is the sample mean calculated as follows:
x = Σx ÷ n Σx is the sum of the net quantities of all units in the sample t is the value determined in accordance with Part III for the selected sample size n is the number of units in the sample s is the standard deviation of the sample, calculated as follows:
Image 1
Σ(x-x)2
is the sum of the squared differences between the sample mean and the net quantity of each unit in the sample.
* The value of (t ÷ √n) may, instead of being calculated in accordance with this Part, be determined using the applicable value set out in column III of the table to Part III.
PART III TABLE FOR VALUES OF t AND (t ÷ √n) Column I
| Column II
| Column III
|
|
|---|
Sample Size
| t*
| (t ÷ √n)*
|
|
|---|
|
|---|
2
| 63.657
| 45.01
|
Linear Interpolation of Values
| 3
| 9.925
| 5.73
| Where a sample size is selected that is not listed in column I of this table and lies between 32 and 125, the value of t will be determined by linear interpolation as follows:
t = a
((c-e)
/
(c-d)
)
(ab)
where
a is the value of t for the closest sample size below the selected sample size
b is the value of t for the closest sample size above the selected sample size
c is the result of 120 divided by the closest sample size below the selected sample size
d is the result of 120 divided by the closest sample size above the selected sample size
e is the result of 120 divided divided by the selected size
| 4
| 5.841
| 2.92
| 5
| 4.604
| 2.06
| 6
| 4.032
| 1.65
| 7
| 3.707
| 1.40
| 8
| 3.499
| 1.24
| 9
| 3.355
| 1.12
| 10
| 3.250
| 1.03
| 11
| 3.169
| 0.955
| 12
| 3.106
| 0.897
| 13
| 3.055
| 0.847
| 14
| 3.012
| 0.805
| 15
| 2.977
| 0.769
| 16
| 2.947
| 0.737
| 17
| 2.921
| 0.708
| 18
| 2.898
| 0.683
| 19
| 2.878
| 0.660
| 20
| 2.861
| 0.640
| 21
| 2.845
| 0.621
| 22
| 2.831
| 0.604
| 23
| 2.819
| 0.588
| 24
| 2.807
| 0.573
| 25
| 2.797
| 0.559
| 26
| 2.787
| 0.547
| 27
| 2.779
| 0.535
| 28
| 2.771
| 0.524
| 29
| 2.763
| 0.513
| 30
| 2.756
| 0.503
| 31
| 2.750
| 0.494
| 32
| 2.746
| 0.485
| 64
| 2.657
| 0.332
| 96
| 2.634
| 0.269
| 125
| 2.615
| 0.234
|
* Where all units in a lot are selected to constitute a sample, zero shall be used as the value of t and (t ÷ √n).
PART IV MINIMUM NUMBER OF UNITS FOR THE PURPOSES OF PARAGRAPH 52(4)(b)
| Column I
| Column II
|
|---|
Item
| Sample Size
| Minimum Number of Units*
|
|---|
|
|---|
1.
| from 2 to 8
| 1
| 2.
| from 9 to 20
| 2
| 3.
| from 21 to 32
| 3
| 4.
| from 33 to 50
| 4
| 5.
| from 51 to 65
| 5
| 6.
| from 66 to 80
| 6
| 7.
| from 81 to 102
| 7
| 8.
| from 103 to 125
| 8
|
* Minimum number of units in the sample that result in the lot not meeting the requirements of the Act and these Regulations respecting the statement of quantity. SOR/89-570, s. 5.
PART I TOLERANCES FOR LOCAL STANDARDS OF MASS THAT HAVE A NOMINAL VALUE SHOWN IN METRIC UNITS AND THAT ARE USED TO INSPECT DEVICES FOR WEIGHING PRECIOUS METALS
| Column I
| Column II
|
|---|
Item
| Nominal Value of
Local Standard
| Tolerance
|
|---|
|
|---|
|
Grams
|
| 1.
| More than 100
| 0.0015% of Nominal Value
|
|
|
Milligrams
| 2.
| 100
| 1.5
| 3.
| 50
| 1
| 4.
| 20
| 0.8
| 5.
| 10
| 0.6
| 6.
| 5
| 0.5
| 7.
| 2
| 0.4
| 8.
| 1
| 0.3
|
|
Milligrams
|
| 9.
| 500
| 0.25
| 10.
| 200
| 0.2
| 11.
| 100
| 0.15
| 12.
| 50
| 0.12
| 13.
| 20
| 0.1
| 14.
| 10
| 0.08
| 15.
| 5 or less
| 0.06
|
PART II TOLERANCES FOR LOCAL STANDARDS OF MASS OR WEIGHT THAT HAVE A NOMINAL VALUE SHOWN IN CANADIAN UNITS AND THAT ARE USED TO INSPECT DEVICES FOR WEIGHING PRECIOUS METALS
| Column I
| Column II
|
|---|
Item
| Nominal Value of
Local Standard
| Tolerance
|
|---|
|
|---|
|
Troy Ounces
|
| 1.
| More than 5
| 0.0015% of Nominal Value
|
|
|
Grains
| 2.
| 5
| 0.036
| 3.
| 2
| 0.0173
| 4.
| 1
| 0.0135
| 5.
| 0.5
| 0.011
| 6.
| 0.2
| 0.0081
| 7.
| 0.1
| 0.0067
| 8.
| 0.05
| 0.0055
| 9.
| 0.02
| 0.0041
| 10.
| 0.01
| 0.0034
| 11.
| 0.005
| 0.0027
| 12.
| 0.002
| 0.002
| 13.
| 0.001
| 0.0017
|
|
Grains
|
| 14.
| 1, 000
| 0.0177
| 15.
| 600
| 0.0143
| 16.
| 300
| 0.0122
| 17.
| 200
| 0.0102
| 18.
| 100
| 0.0082
| 19.
| 60
| 0.0071
| 20.
| 30
| 0.0061
| 21.
| 20
| 0.0051
| 22.
| 10
| 0.0041
| 23.
| 6
| 0.0036
| 24.
| 3
| 0.003
| 25.
| 2
| 0.0025
| 26.
| 1
| 0.002
| 27.
| 0.6
| 0.0017
| 28.
| 0.3
| 0.0015
| 29.
| 0.2
| 0.001
| 30.
| 0.1 or less
| 0.0009
|
PART III TOLERANCES FOR LOCAL STANDARDS OF MASS THAT HAVE A NOMINAL VALUE SHOWN IN METRIC UNITS AND THAT ARE USED TO INSPECT DEVICES FOR WEIGHING COMMODITIES OTHER THAN PRECIOUS METALS
| Column I
| Column II
|
|---|
Item
| Nominal Value of
Local Standard
| Tolerance
|
|---|
|
|---|
|
Kilograms
|
| 1.
| More than 1
| 0.005% of Nominal Value
|
|
|
Milligrams
| 2.
| 1
| 50
|
|
Grams
|
| 3.
| 500
| 25
| 4.
| 200
| 10
| 5.
| 100
| 5
| 6.
| 50
| 3
| 7.
| 20
| 2.5
| 8.
| 10
| 2
| 9.
| 5
| 1.5
| 10.
| 2
| 1.2
| 11.
| 1
| 1
|
|
Milligrams
|
| 12.
| 500
| 0.8
| 13.
| 200
| 0.6
| 14.
| 100
| 0.5
| 15.
| 50
| 0.4
| 16.
| 20
| 0.3
| 17.
| 10
| 0.25
| 18.
| 5 or less
| 0.2
|
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