Regulation 9
SCHEDULE 1N.I.ACCURACY CLASSIFICATION OF NON-AUTOMATIC WEIGHING MACHINES
PART IN.I.General
1. Non-automatic weighing machines are divided into four classes of accuracy according to specifications set out in Parts II to V. The division depends on their characteristics as well as the provisions relating to maximum capacity, the lower limit of the minimum load, the number of scale intervals and the scale interval itself.N.I.
Commencement Information
I1Sch. 1 Pt. I para. 1 in operation at 13.2.2006, see reg. 1(1)
2. Where self and semi-self indicating machines are provided with an indicating device on which the last figure is clearly differentiated from the other figures, the classification of the machines into accuracy classes, their number of scale intervals and their minimum load shall be determined by reference to the verification scale interval.N.I.
Commencement Information
I2Sch. 1 Pt. I para. 2 in operation at 13.2.2006, see reg. 1(1)
3. In each weighing mode of a machine each of the tare, weight indicating and printing devices operable in that mode has an associated verification scale interval. In a different weighing mode the same devices may have different verification scale intervals. When testing a machine it is therefore necessary to determine the verification scale interval for each device in each of the weighing modes in which it is operable.N.I.
Commencement Information
I3Sch. 1 Pt. I para. 3 in operation at 13.2.2006, see reg. 1(1)
4. A weight indicating or printing device which, in any single weighing mode, has its weighing range divided into parts, each part having a different scale interval, will also have a different verification scale interval for each part. When testing in a particular weighing mode the relevant verification scale intervals are those associated with those devices in that mode.N.I.
Commencement Information
I4Sch. 1 Pt. I para. 4 in operation at 13.2.2006, see reg. 1(1)
5. Each verification scale interval is—N.I.
(a)marked on the machine in accordance with the published particulars of the approved pattern or, if there are no such markings,
(b)specified in the relevant Table in Parts II to V.
Commencement Information
I5Sch. 1 Pt. I para. 5 in operation at 13.2.2006, see reg. 1(1)
6. The presence of a tare device or of a verification device on the machine does not affect the classification of the machine, which depends on its own characteristics. These devices are considered as belonging to the class of accuracy of the machine to which they are attached irrespective of their own characteristics.N.I.
Commencement Information
I6Sch. 1 Pt. I para. 6 in operation at 13.2.2006, see reg. 1(1)
7. For machines provided with several weight indicating or printing devices, each of the devices—N.I.
(a)has its own minimum load, the value of which is determined from the appropriate Table in Parts II, III, IV or V, depending on its metrological characteristics; and
(b)has the same digital scale interval, which must be at most equal to the smallest of any analogue scale interval.
Commencement Information
I7Sch. 1 para. 7 in operation at 13.2.2006, see reg. 1(1)
8. For machines provided with graduated tare devices the smallest scale interval of the devices must be equal to the smallest scale interval of the machine to which it is fitted. The verification scale interval of these devices shall be equal to the smallest verification scale interval of the machine.N.I.
Commencement Information
I8Sch. 1 para. 8 in operation at 13.2.2006, see reg. 1(1)
9. For machines fitted with a graduated verification device the scale interval of such an incorporated device must be at most equal to one-fifth of the scale interval of the machine.N.I.
Commencement Information
I9Sch. 1 para. 9 in operation at 13.2.2006, see reg. 1(1)
PART IIN.I.Machines Designated Class I
10. A machine made in accordance with an approved pattern and which is or could be marked N.I.
is a Class I machine.
Commencement Information
I10Sch. 1 para. 10 in operation at 13.2.2006, see reg. 1(1)
11. The specifications for non-graduated and graduated Class I machines are given in Table 1.N.I.
Table 1
Maximum capacity“Max” | Lower limit of the minimum load“Min” | Scale interval“d” | Number of scale intervals“n” | Verification scale interval“e” |
---|---|---|---|---|
Non-graduated machines | ||||
100 mg ≤ Max | 10 e | 0.1 mg | ||
≤ 1 g | ||||
1 g ≤ Max | 50 e | Max | ||
<10 g | ... ... ... ... | |||
10 000 | ||||
10 g ≤ Max | 50 e | 1 mg | ||
<100 g | ||||
100 g ≤ Max | 50 e | Max | ||
... ... ... ... | ||||
100 000 | ||||
Graduated machines | ||||
0.5 mg ≤ Max | d | d ≤ 0.005 mg | 10 ≤ n | d |
1 mg ≤ Max | 10 d | 0.01 mg ≤ d | 100 ≤ n | d |
≤ 0.05 mg | ||||
10 mg ≤ Max | 50 d | 0.1 mg ≤ d | 100 ≤ n | d |
≤ 0.5 mg | ||||
100 g ≤ Max | 50 d | 1 mg ≤ d | 100 000 ≤ n | d |
Commencement Information
I11Sch. 1 para. 11 in operation at 13.2.2006, see reg. 1(1)
NotesN.I.
1. When a machine is provided with a rider its verification scale interval shall be the smaller of the following—
(i)the verification scale interval of the machine not taking into account the rider, or
(ii)the scale interval of the rider device.
Commencement Information
I12Sch. 1 Pt. II para. 1 in operation at 13.2.2006, see reg. 1(1)
2. When graduated machines of the self and semi-self indicating type are provided with a device for interpolation of reading, this shall not be taken into account when determining the verification scale interval of the machine.
Commencement Information
I13Sch. 1 Pt. II para. 2 in operation at 13.2.2006, see reg. 1(1)
3. When graduated machines of the self or semi-self indicating type are provided with an indicating device on which the last figure is clearly differentiated from the other figures, the verification scale interval shall correspond to the last but one figure of the indication.
Commencement Information
I14Sch. 1 Pt. II para. 3 in operation at 13.2.2006, see reg. 1(1)
4. In the case of machines where the weight indicating or printing is in carat (metric) units or ounces troy the relevant capacity and verification scale interval shall be the amounts in carat (metric) or ounces troy respectively which are equivalent to those specified in the Table in terms of mg, g and kg.
Commencement Information
I15Sch. 1 Pt. II para. 4 in operation at 13.2.2006, see reg. 1(1)
5. Where the equivalent metric value for an ounce troy scale interval falls between ranges then the value shall be considered as belonging to the lower range.
Commencement Information
I16Sch. 1 Pt. II para. 5 in operation at 13.2.2006, see reg. 1(1)
PART IIIN.I.Machines Designated Class II
12. A machine which is:N.I.
(a)made in accordance with an approved pattern and which is or could be marked
, or
(b)first stamped before 1st November 1991 and marked “Class B” in accordance with the provisions for beam scales in the Weights and Measures Regulations (Northern Ireland) 1967,
is a Class II machine.
Commencement Information
I17Sch. 1 para. 12 in operation at 13.2.2006, see reg. 1(1)
13. The specifications for non-graduated and graduated Class II machines are given in Table 2.N.I.
Table 2
Maximum capacity“Max” | Lower limit of the minimum load“Min” | Scale interval“d” | Number of scale intervals“n” | Verification scale interval“e” |
---|---|---|---|---|
Non-graduated machines | ||||
1 g ≤ Max <5 g | 10 e | Max | ||
... ... ... ... | ||||
1 000 | ||||
5 g ≤ Max | 10 e | 5 mg | ||
<100 g | ||||
100 g ≤ Max | 10 e | Max | ||
<200 g | ... ... ... ... | |||
20 000 | ||||
200 g ≤ Max | 50 e | Max | ||
... ... ... ... | ||||
20 000 | ||||
Graduated machines | ||||
Non-self indicating machines | ||||
1 g ≤ Max <50 g | 10 d | 1 mg ≤ d ≤ 5 mg | 200 ≤ n <50 000 | d |
10 g ≤ Max <50 g | 50 d | 10 mg ≤ d ≤ 50 mg | 1 000 ≤ n < 5 000 | 5 mg |
50 g ≤ Max ≤500 g | 10 d | 1 mg ≤ d ≤ 5 mg | 10 000 ≤ n ≤ 100 000 | d |
50 g ≤ Max <5 kg | 50 d | 10 mg ≤ d ≤ 500 mg | 1 000 ≤ n < 10 000 | Max |
10 000 | ||||
100 g ≤ Max ≤ 50 kg | 50 d | 10 mg ≤ d ≤ 500 mg | 10 000 ≤ n ≤ 100 000 | d |
5 kg ≤ Max | 50 d | 1 g ≤ d | 5 000 ≤ n <10 000 | Max |
10 000 | ||||
10 kg ≤ Max | 50 d | 1 g ≤ d | 10 000 ≤ n ≤ 100 000 | d |
Self and semi-self indicating machines | ||||
1 g ≤ Max ≤ 500 g | 10 d | 1 mg ≤ d ≤ 5 mg | 200 ≤ n ≤ 100 000 | d |
10 g ≤ Max ≤ 50 kg | 50 d | 10 mg ≤ d ≤ 500 mg | 1 000 ≤ n ≤ 100 000 | d |
5 kg ≤ Max | 50 d | 1 g ≤ d | 5 000 ≤ n ≤ 100 000 | d |
Commencement Information
I18Sch. 1 para. 13 in operation at 13.2.2006, see reg. 1(1)
NotesN.I.
1. When a machine is provided with a rider its verification scale interval shall be the smaller of the following—
(i)the verification scale interval of the machine not taking into account the rider, or
(ii)the scale interval of the rider device.
Commencement Information
I19Sch. 1 Pt. III para. 1 in operation at 13.2.2006, see reg. 1(1)
2. When graduated self or semi-self indicating machines are provided with a device for interpolation of reading, this shall not be taken into account when determining the verification scale interval of the machine.
Commencement Information
I20Sch. 1 Pt. III para. 2 in operation at 13.2.2006, see reg. 1(1)
3. When graduated self or semi-self indicating machines are provided with an indicating device on which the last figure is clearly differentiated from the other figures, the verification scale interval shall correspond to the last but one figure of the indication.
Commencement Information
I21Sch. 1 Pt. III para. 3 in operation at 13.2.2006, see reg. 1(1)
4. Machines of a maximum capacity equal to or greater than 1 kg of an actual scale interval of 100 mg and of a verification scale interval of 1 g may belong to this class of machine, provided that the last figure is clearly differentiated from the other figures.
Commencement Information
I22Sch. 1 Pt. III para. 4 in operation at 13.2.2006, see reg. 1(1)
5. In the case of machines where the weight indicating or printing is in carat (metric) units or ounces troy the relevant capacity and verification scale interval shall be the amounts in carat (metric) or ounces troy respectively which are equivalent to those specified in the Table in terms of mg, g and kg.
Commencement Information
I23Sch. 1 Pt. III para. 5 in operation at 13.2.2006, see reg. 1(1)
6. Where the equivalent metric value for an ounce troy scale interval falls between ranges then the value shall be considered as belonging to the lower range.
Commencement Information
I24Sch. 1 Pt. III para. 6 in operation at 13.2.2006, see reg. 1(1)
PART IVN.I.Machines Designated Class III
14. A machine which is—N.I.
(a)made in accordance with an approved pattern and which is or could be marked
, or
(b)first stamped before 1st November 1991 and marked “Class C” in accordance with the provisions for beam scales in the Weights and Measures Regulations (Northern Ireland) 1967, or
(c)of a type referred to as “common form” and which was first stamped before 1st August 1991,
is a Class III machine.
Commencement Information
I25Sch. 1 para. 14 in operation at 13.2.2006, see reg. 1(1)
15. The specifications for non-graduated and graduated Class III machines are given in Table 3.N.I.
Table 3
Maximum capacity“Max” | Lower limit of the minimum load“Min” | Scale interval“d” | Number of scale intervals“n” | Verification scale interval“e” |
---|---|---|---|---|
Non-graduated machines | ||||
20 g ≤ Max | 20 e | 0.1 g | ||
<100 g | ||||
100 g ≤ Max | 20 e | Max | ||
<1 kg | ... ... ... ... | |||
1 000 | ||||
1 kg ≤ Max | 20 e | 1 g | ||
<2 kg | ||||
2 kg ≤ Max | 20 e | Max | ||
... ... ... ... | ||||
2 000 | ||||
Graduated machines | ||||
Non-self indicating machines | ||||
20 g ≤ Max <100 g | 10 d | 0.1 g ≤ d ≤ 0.2 g | 200 ≤ n <1 000 | 0.1 g |
100 g ≤ Max <1 kg | 20 d | 0.2 g ≤ d ≤1 g | 200 ≤ n<1 000 | Max |
1 000 | ||||
100 g ≤ Max ≤ 10 kg | 20 d | 0.1 g ≤ d ≤1 g | 1 000 ≤ n ≤ 10 000 | d |
400 g ≤ Max <5 kg | 20 d | 2 g ≤ d ≤ 5 g | 200 ≤ n <1 000 | Max |
1 000 | ||||
2 kg ≤ Max ≤ 50 kg | 20 d | 2 g ≤ d ≤ 5 g | 1 000 ≤ n ≤ 10 000 | d |
5 kg ≤ Max <10 t | 20 d | 10 g ≤ d ≤ 10 kg | 500 ≤ n <1 000 | Max |
1 000 | ||||
10 kg ≤ Max ≤ 100 t | 20 d | 10 g ≤ d ≤10 kg | 1 000 ≤ n ≤10 000 | d |
15 t ≤ Max <100 t | 20 d | 20 kg ≤ d ≤ 50 kg | 750 ≤ n <1 000 | Max |
1 000 | ||||
15 t ≤ Max <100 t | 10 d | 100 kg | 750 ≤ n <1 000 | Max |
1 000 | ||||
20 t ≤ Max ≤ 1 000 t | 20 d | 20 kg ≤ d ≤ 50 kg | 1 000 ≤ n ≤ 10 000 | d |
20 t ≤ Max ≤ 1 000 t | 10 d | 100 kg | 1 000 ≤ n ≤ 10 000 | d |
150 t ≤ Max | 10 d | 200 kg ≤ d | 750 ≤ n < 1 000 | Max |
1 000 | ||||
200 t ≤ Max | 10 d | 200 kg ≤ d | 1 000 ≤ n ≤ 10 000 | d |
Self and semi- self indicating machines | ||||
20 g ≤ Max ≤ 10 kg | 10 d | 0.1 g ≤ d ≤ 1 g | 50 ≤ n ≤ 10 000 | d |
400 g ≤ Max ≤ 50 kg | 20 d | 2 g ≤ d ≤ 5 g | 200 ≤ n ≤ 10 000 | d |
5 kg ≤ Max ≤ 200 kg | 20 d | 10 g ≤ d ≤ 20 g | 500 ≤ n ≤ 10 000 | d |
25 kg ≤ Max ≤ 100 t | 20 d | 50 g ≤ d ≤ 10 kg | 500 ≤ n ≤ 10 000 | d |
15 t ≤ Max ≤ 1 000 t | 20 d | 20 kg ≤ d ≤ 50 kg | 750 ≤ n ≤10 000 | d |
15 t ≤ Max ≤ 1 000 t | 10 d | 100 kg | 750 ≤ n ≤ 10 000 | d |
150 t < Max | 10 d | 200 kg ≤ d | 750 ≤ n ≤ 10 000 | d |
Commencement Information
I26Sch. 1 para. 15 in operation at 13.2.2006, see reg. 1(1)
PART VN.I.Machines Designated Class IIII
16. A machine which is—N.I.
(a)made in accordance with an approved pattern and which is or could be marked
, or
(b)first stamped before 1st August 1991 in accordance with the provisions for crane weighing machines constructed upon the hydraulic principle in the Weights and Measures Regulations (Northern Ireland) 1967, or
(c)of the type referred to as “approximate weighers” and first stamped before 1st August 1991, or
(d)of a type referred to as “common form” and which was first stamped before 1st August 1991,
is a Class IIII machine.
Commencement Information
I27Sch. 1 para. 16 in operation at 13.2.2006, see reg. 1(1)
17. The specifications for non-graduated and graduated Class IIII machines are given in Table 4.N.I.
Table 4
Maximum capacity“Max” | Lower limit of the minimum load“Min” | Scale interval“d” | Number of scale intervals“n” | Verification scale interval“e” |
---|---|---|---|---|
Non-graduated machines | ||||
400 g ≤ Max <2 kg | 10 e | 5 g | ||
2 kg ≤ Max | 10 e | Max | ||
... ... ... ... | ||||
400 | ||||
Graduated machines | ||||
Non-self indicating machines | ||||
400 g ≤ Max <2 kg | 10 d | 5 g ≤ d ≤ 10 g | 80 ≤ n <400 | 5 g |
2 kg ≤ Max <4 t | 10 d | 10 g ≤ d ≤ 10 kg | 100 ≤ n <400 | Max |
400 | ||||
2 kg ≤ Max ≤ 10 t | 10 d | 5 g ≤ d ≤ 10 kg | 400 ≤ n ≤ 1 000 | d |
4 t ≤ Max | 10 d | 20 kg ≤ d | 200 ≤ n < 400 | Max |
400 | ||||
8 t ≤ Max | 10 d | 20 kg ≤ d | 400 ≤ n ≤ 1 000 | d |
Self and semi- self indicating machines | ||||
400 g ≤ Max ≤ 10 t | 10 d | 2 g ≤ d ≤ 10 kg | 60 ≤ n ≤ 1 000 | d |
4 t ≤ Max | 10 d | 20 kg ≤ d | 200 ≤ n ≤ 1 000 | d |
Commencement Information
I28Sch. 1 para. 17 in operation at 13.2.2006, see reg. 1(1)