Schedule 9

Maximum permissible uncertainty and maximum permissible variation—mass (Inspectors’ Class 1, Class 2 and Class 3 standards)

Current

(paragraph 27(c), subparagraph 27(e)(ii), paragraphs 28(b) and (c) and regulations 29, 32, 33 and 34)

Column 1 Denomina‑tion	Column 2 Maximum permissible uncertainty (at 95% level of confidence): Inspectors’ Class 1 standard (in mg)	Column 3 Maximum permissible variation: Inspectors’ Class 1 standard (in mg)	Column 4 Maximum permissible uncertainty (at 95% level of confidence): Inspectors’ Class 2 standard (in mg)	Column 5 Maximum permissible variation: Inspectors’ Class 2 standard (in mg)	Column 6 Maximum permissible uncertainty (at 95% level of confidence): Inspectors’ Class 3 standard (in mg)	Column 7 Maximum permissible variation: Inspectors’ Class 3 standard (in mg)
10 000 kg					533 333	1 066 667
5 000 kg					266 667	533 333
2 000 kg					100 000	200 000
1 000 kg					53 333	106 667
500 kg					26 667	53 333
200 kg					10 000	20 000
100 kg					5 333	10 667
50 kg	267.000	533.000	833.000	1 667.00	2 667	5 333
25 kg	127.000	253.000	417.000	833.00	1 267	2 533
20 kg	100.000	200.000	333.000	667.00	1 000	2 000
10 kg	53.000	107.000	167.000	333.00	533	1 067
5 kg	27.000	53.000	83.000	167.00	267	533
2 kg	10.000	20.000	33.000	67.00	100	200
1 kg	6.000	11.000	17.000	33.00	53	107
500 g	2.700	5.300	8.500	16.70	27	53
200 g	1.000	2.000	3.500	6.70	10	20
100 g	0.600	1.070	1.700	3.30	5	11
50 g	0.400	0.670	1.000	2.00
20 g	0.300	0.530	0.800	1.70
10 g	0.200	0.400	0.700	1.30
5 g	0.170	0.330	0.550	1.10
2 g	0.140	0.270	0.400	0.80
1 g	0.100	0.200	0.350	0.67
500 mg	0.085	0.170	0.270	0.53
200 mg	0.070	0.130	0.200	0.40
100 mg	0.055	0.110	0.170	0.33
50 mg	0.040	0.080	0.130	0.27
20 mg	0.035	0.070	0.100	0.20
10 mg	0.030	0.050	0.080	0.17
5 mg	0.020	0.040	0.070	0.13
2 mg	0.020	0.040	0.070	0.13
1 mg	0.020	0.040	0.070	0.13

Note:

The maximum permissible uncertainties in this table are based on OIML R 111.

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