Paragraph 2 Units of mass

Accuracy classes

2.1

The following accuracy classes have been defined:

special

high

III

medium

IIII

ordinary

The specifications of these classes are given in Table 1.

Table 1

Accuracy classes

Class	Verification scale interval (e)	Minimum capacity (Min)	Number of verification scale intervals
			$n = \frac{Max}{e}$
		minimum value	minimum value	maximum value
I	0,001 g ≤ e	100 e	50 000	—
II	0,001 g ≤ e ≤ 0,05 g	20 e	100	100 000
	0,1 g ≤ e	500 e	5 000	100 000
III	0,1 g ≤ e ≤ 2 g	20 e	100	10 000
	5 g ≤ e	20 e	500	10 000
IIII	5 g ≤ e	10 e	100	1 000

The minimum capacity is reduced to 5e for instruments in classes II and III for determining a conveying tariff.

2.2.

Scale intervals

2.2.1.

The actual scale interval (d) and the verification scale interval (e) shall be in the form:

1 × 10^k, 2 × 10^k or 5 × 10^k mass units,

k being any integer or zero.

2.2.2.

For all instruments other than those with auxiliary indicating devices: d = e

2.2.3.

For instruments with auxiliary indicating devices the following conditions apply:

e = 1 × 10^k g

d < e ≤ 10 d

except for instruments of class I with d < 10⁻⁴ g, for which e = 10⁻³ g.

Notes on Schedule 2

f1: See “Nonautomatic weighing instruments Part I: Metrological and technical requirements-Tests” OIML R 76-1 Edition 1992 (E) published by the International Organisation for Legal Metrology.