Field Inspection Manual—Non Automatic Weighing Devices

Part 4, Section C: Standards Accuracy Class – Non Automatic Weighing Device (Field Inspection Manual—Non Automatic Weighing Devices) (PDF, 24 KB, 4 pages)

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Part 4, Section C: Standards Accuracy Class – Non Automatic Weighing Device

The following tables list the required accuracy standard for an inspection of a given device Non Automatic Device class. Individual tables are provided for Acceptance and In-Service as well as for Metric and Avoirdupois units of measure.

Metric Device type		Required accuracy class of the standard - Acceptance
		E1	E2	F1	F2	M1	M1-2	M2	M2-3	M3
NAWD	I (when e ≥ 1 mg)	All	n ≤ 312 500	---	---	---	---	---	---	—
	II (when e ≥ 1 mg)	All	All	All	All 1	—	—	—	—	—
	III (e ≥ 0.1 g)	All	All	All	All	All	n ≤ 8 333 and e ≥ 20 g	n ≤ 1 667	—	—
	III HD (e ≥ 2 kg)	All	All	All	All	All	n ≤ 36 666	n ≤ 18 333	---	—
	IIII (e ≥ 5 g)	All	All	All	All	All	e ≥ 200 g	All	e ≥ 500 g	All

Notes:

• Class F₂ is equal to Measurement Canada's Precious Metal Weight Kits.
• Class M₁ is equal to Measurement Canada's Inspector's Weight Kits.
• n is the maximum number of scale intervals which can be verified on the indicated device type, with the indicated accuracy class standard.

Metric Device type		Required accuracy class of the standard - In Service
		E1	E2	F1	F2	M1	M1-2	M2	M2-3	M3
NAWD	I (when e ≥ 1 mg)	All	n ≤ 625 000	n ≤ 133 000	---	---	---	---	---	—
	II (when e ≥ 1 mg)	All	All	All	All 2	n ≤ 13 333 and e ≥ 10 mg	—	—	—	—
	III (e ≥ 0.1 g)	All	All	All	All	All	e ≥ 20 g	n ≤ 8 333	n ≤ 1 667 and e ≥ 50 g	n ≤ 1 333
	III HD (e ≥ 2 kg)	All	All	All	All	All	All	n ≤ 36 667	n ≤ 18 333	n ≤ 2 000
	IIII (e ≥ 5 g)	All	All	All	All	All	e ≥ 200 g	All	e ≥ 500 g	All

Notes:

• Class F₂ is equal to Measurement Canada's Precious Metal Weight Kits.
• Class M1 is equal to Measurement Canada's Inspector's Weight Kits.
• n is the maximum number of scale intervals which can be verified on the indicated device type, with the indicated accuracy class standard.

Avoirdupois Device type		Required accuracy class of the standard - Acceptance
		E1	E2	F1	F2	M1	M1-2	M2	M2-3	M3
NAWD	I	NA	n ≤ 312 500	---	---	---	---	---	---	—
	II		All	All	All 3	—	—	—	—	—
	III (e ≥ 0.0002 lb or 0.005 oz)		All	All	All	All	n ≤ 8 333 and e ≥ 0.05 lb	n ≤ 1 667	—	—
	III HD (e ≥ 5 lb)		All	All	All	All	n ≤ 36 666	n ≤ 18 333	---	—
	IIII (e ≥ 0.01 lb or 0.2 oz)		All	All	All	All	e ≥ 0.5 lb	All	e ≥ 1 lb	All

Notes:

• Class F₂ is equal to Measurement Canada's Precious Metal Weight Kits.
• Class M₁ is equal to Measurement Canada's Inspector's Weight Kits.
• n is the maximum number of scale intervals which can be verified on the indicated device type, with the indicated accuracy class standard.

Avoirdupois Device type		Required accuracy class of the standard - In Service
		E1	E2	F1	F2	M1	M1-2	M2	M2-3	M3
NAWD	I	NA	n ≤ 625 000	n ≤ 133 000	---	---	---	---	---	—
	II		All	All	All 4	n ≤ 13 333 and e ≥ 0.2 gr ≥0.0005 oz tr	—	—	—	—
	III (e ≥ 0.0002 lb or 0.005 oz)		All	All	All	All	e ≥ 0.05 lb	n ≤ 8 333	n ≤ 1 667 and e ≥ 0.1 lb	n ≤ 1 333
	III HD (e ≥ 5 lb)		All	All	All	All	All	n ≤ 36 667	n ≤ 18 333	n ≤ 2 000
	IIII (e ≥ 0.01lb or 0.2 oz)		All	All	All	All	e ≥ 0.5 lb	All	e ≥ 1 lb	All

Notes:

• Class F₂ is equal to Measurement Canada's Precious Metal Weight Kits.
• Class M₁ is equal to Measurement Canada's Inspector's Weight Kits.
• n is the maximum number of scale intervals which can be verified on the indicated device type, with the indicated accuracy class standard.

Revision:

Rev.1 Suspend restriction on Class II devices inspected with Precious Metal Weight Kits (OIML Class F₂ weights)

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¹ This section is under review. Until further notice, Precious Metal Weights (OIML F₂) are suitable for inspection of all Class II devices.

² This section is under review. Until further notice, Precious Metal Weights (OIML F₂) are suitable for inspection of all Class II devices.

³ This section is under review. Until further notice, Precious Metal Weights (OIML F₂) are suitable for inspection of all Class II devices.

⁴ This section is under review. Until further notice, Precious Metal Weights (OIML F₂) are suitable for inspection of all Class II devices.