The Non-automatic Weighing Instruments (EEC Requirements) Regulations 1993

Units of mass

3.  Classification

3.1. Instruments with one weighing range Instruments equipped with an auxiliary indicating device shall belong to class I or class II. For these instruments the minimum capacity lower limits for these two classes are obtained from Table 1 by replacement in column 3 of the verification scale interval (e) by the actual scale interval (d).

If d < 10⁻⁴g, the maximum capacity of class I may be less than 50 000 e.

3.2. Instruments with multiple weighing ranges

Multiple weighing ranges are permitted, provided they are clearly indicated on the instrument. Each individual weighing range is classified according to 3.1. If the weighing ranges fall into different accuracy classes the instrument shall comply with the severest of the requirements that apply for the accurcy classes in which the weighing ranges fall.

3.3. Multi-interval instruments

3.3.1. Instruments with one weighing range may have several partial weighing ranges (multi-interval instruments).

Multi-interval instruments shall not be equipped with an auxiliary indicating device.

3.3.2. Each partial weighing range i of multi-interval instruments is defined by:

• its verification scale interval e_i with e(_i + _l) ≥ e_i

• its maximum capacity Max_i with Max_i = Max

• its minimum capacity Min_i with Min_i= Max (_i − _l) and Min_i= Min

where:

• i = 1, 2, . . . r,

• i = partial weighing range number,

• r = the total number of partial weighing ranges.

• All capacities are capacities of net load, irrespective of the value of any tare used.

3.3.3. The partial weighing ranges are classified according to Table 2. All partial weighing ranges shall fall into the same accuracy class, this class being the instrument’s accuracy class.

Table 2

Multi-interval instruments

I = 1, 2,…rI = partial weighing range numberR = total number of partial weighing ranges

	Minimum capacity (Min)	Number of verification scale intervals
Class	Verification scale interval (e)	Minimum value	Minimum value(1)	Maximum value
(1) For i = r the corresponding column of Table 1 applies, with e replaced by er.
I	0,001 g ≤ei	100 ei	50 000	—
II	0,001 g ≤ei ≤0,05 g	20 ei	5 000	100 000
	0,1 g ≤ei	50 ei	5 000	100 000
III	0,1 g ≤ei	20 ei	500	10 000
IIII	5 g ≤ei	10 ei	50	1 000