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Weights and Measures Regulations

Version of the schedule from 2014-08-01 to 2025-10-14:

SCHEDULE IV(ss. 53 and 54)Tolerances for Local Standards

PART I

Tolerances for Local Standards of Mass That Have a Nominal Value Shown in Metric Units and That are Used to Examine Devices for Weighing Precious Metals

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
	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 Examine Devices for Weighing Precious Metals

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
	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 Examine Devices for Weighing Commodities Other Than Precious Metals

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
	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

PART IV

Tolerances for Local Standards of Mass or Weight That Have a Nominal Value Shown in Canadian Units and That are Used to Examine Devices for Weighing Commodities Other Than Precious Metals

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
	Pounds
1	More than 1	0.005% of Nominal Value
		Grains
2	1	0.35
3	0.5	0.175
4	0.2	0.071
5	0.1	0.045
6	0.05	0.035
7	0.02	0.028
8	0.01	0.022
9	0.005	0.018
10	0.002	0.015
11	0.001	0.012
	Ounces
12	8	0.175
13	4	0.088
14	2	0.05
15	1	0.041
16	½	0.034
17	¼	0.026
18	1/8	0.021
19	1/16	0.018
20	1/32	0.015
	Grains
21	1,000	0.055
22	600	0.043
23	300	0.038
24	200	0.033
25	100	0.025
26	60	0.021
27	30	0.018
28	20	0.016
29	10	0.013
30	6	0.011
31	3	0.009
32	2	0.008
33	1	0.007
34	0.6	0.006
35	0.3	0.005
36	0.2	0.004
37	0.1 or less	0.003

PART V

Tolerances for All Local Standards of Length that Have a Nominal Value Shown in Metric Units

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
	Metres	Millimetres
1	30	4
2	15	3
3	3	1.5
4	2	1.0
5	1	0.5
	Millimetres
6	500	0.4
7	300	0.3
8	100	0.1
9	25	0.05

PART VI

Tolerances for All Local Standards of Length that Have a Nominal Value Shown in Canadian Units

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
	Feet	Inches
1	100	0.15
2	50	0.10
3	10	0.05
4	6	0.04
5	3	0.025
6	2	0.015
7	1	0.010
	Inches
8	6	0.005
9	1	0.001

PART VII

Tolerances for Narrow Neck Standards that Have a Nominal Value Shown in Metric Units

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
	Litres
1	50 or more	0.04% of the nominal value
2	20	10 mL
3	5	6 mL
4	2	3 mL
5	1	1.5 mL
6	0.5	0.9 mL
7	0.2 or less	0.25% of the nominal value

PART VIII

Tolerances for Narrow Neck Standards that Have a Nominal Value Shown in Canadian Units

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
	Gallons
1	10 or more	0.04% of the nominal value
2	5	0.40 fluid ounces
3	1	0.18 fluid ounces
	Quarts
4	3	0.15 fluid ounces
5	2	0.12 fluid ounces
6	1	0.06 fluid ounces
	Pints
7	1	0.05 fluid ounces
8	0.5 or less	0.25% of the nominal value

PART IX

Tolerance for Stoppered Pycnometer Standards

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
1	Any volume	0.02% of the volume

PART X[Revoked, SOR/93-234, s. 2]

PART XI

Tolerances for Cylindrical Graduated Standards of Volume that Have a Nominal Value Shown in Metric Units

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
	Millilitres	Millilitres
1	2 000	8.0
2	1 000	5.0
3	500	3.0
4	250	1.6
5	200	1.4
6	100	0.8
7	50	0.5
8	25	0.3
9	10	0.16
10	5	0.12

PART XII

Tolerances for Cylindrical Graduated Standards of Volume that Have a Nominal Value Shown in Canadian Units

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
	Fluid Ounces	Fluid Ounces
1	40	0.20
2	5	0.04
3	4	0.04

PART XIII

Tolerance for Master Meter Standards That are Used to Examine Liquefied Gas Measuring Machines

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
1	A volume corresponding to a delivery lasting at least one minute	Not more than 0.05% difference in the registered volume for any number of tests made under the same controlled conditions

PART XIV

Tolerance for Master Meter Standards That are Used to Examine Meters Other Than Liquefied Gas Measuring Machines

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
1	A volume corresponding to a delivery lasting at least one minute	No more than 0.03% difference in the registered volume for any number of tests made under the same controlled conditions

PART XV

Tolerance for Pipe Prover Standards with Entirely Mechanical Means of Registration

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
1	Any base volume	0.05% of the volume

PART XVI

Tolerance for Pipe Prover Standards with a Means of Registration other than Entirely Mechanical

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
1	Any base volume	0.02% of the volume

PART XVII

Tolerance for Gravimetric Prover Standards

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
1	Any mass or weight	20 g or the value of the minimum increment of registration, whichever is the lesser

PART XVIII

Tolerance for Hydrometer Standards

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
1	Any density or relative density	0.2% of the density or relative density

PART XIX

Tolerances for Standards of Temperature

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
1	Any temperature from -40°C to +50°C	0.25°C
2	Any temperature greater than +50°C to +175°C	0.6°C

PART XX

Tolerances for Electricity Measuring Standards

Item	Nominal Value of Local Standard	Tolerance
	Column I	Column II
1	Any indication in watt hours	0.05% of the nominal value
2	Any indication in volt ampere hours	0.1% of the nominal value
3	Any indication in var hours	0.1% of the nominal value
4	Any indication in amperes rms	0.1% of the nominal value
5	Any indication in volts rms	0.1% of the nominal value

SOR/89-570, s. 6(F)
SOR/90-118, ss. 43, 44
SOR/93-234, s. 2
SOR/2005-297, ss. 38, 39
SOR/2014-111, s. 46

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Date modified:: 2025-06-04

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Weights and Measures Regulations

SCHEDULE IV(ss. 53 and 54)Tolerances for Local Standards

PART X[Revoked, SOR/93-234, s. 2]

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