Decree of the Ministry of Industry and Trade No. 339 / 2000 Coll.
Decree of the Ministry of Industry and Trade laying down the requirements for mass measuring instruments marked with EEC mark
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Effective from 21.04.2004
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339
DECLARATION
Ministry of Industry and Trade
of 6 September 2000
laying down the requirements for mass measure measuring instruments marked with EEC mark
The Ministry of Industry and Trade provides, pursuant to Section 27 of Act No. 505 / 1990 Coll., on Metrology, as amended by Act No. 119 / 2000 Coll., ("the Act ') for the implementation of Sections 6 (2) and 9 (1) of the Act:
This decree sets out the requirements for the mass measuring instruments (hereinafter referred to as "measuring instruments').
The measurements may be marked with the EEC type-approval mark and the EEC initial verification mark, the graphic form of which is provided for in the specific legislation, (2) only if they comply with the requirements set out in the Annex to this Regulation and the fulfilment of which has been verified by the procedures laid down in the specific legislation.2).
This Regulation shall enter into force on the day of the publication of the sectoral annex to the Protocol to the Europe Agreement establishing an association between the Czech Republic, of the one part, and the European Communities and their Member States, of the other part, on conformity assessment and acceptance of industrial products in the Collection of International Treaties, or on the date of the entry into force of the Treaty of Accession of the Czech Republic to the European Union, if that date is earlier.
Minister:
Doc.
Annex to Decree No 339 / 2000 Coll.
Requirements for gauges
1. DEFINITIONS
1.1 Measurements are gauges containing scale marks whose distances are given in legal units of length.
1.2 The nominal length of the gauge is the length that this gauge is marked with.
1.3 The basic marks of the scale are those of two marks whose distance is the nominal length of the gauge.
1.4 The scale of the gauge consists of scale marks and other marks.
1.5. The length gauge is referred to as:
1.5.1. A terminal gauge if the scale base marks are made up of two surfaces;
1.5.2. A grappling gauge if the scale's basic marks are made up of two lines, commas, openings or marks; the zones are included in this category;
1.5.3. A combined gauge if one of the basic marks of the scale is the area and the other is the aperture or mark.
2. MATERIALS
The measurements and their additional equipment shall be made from materials which, under normal conditions of use, are sufficiently durable, stable and resistant to environmental effects.
The quality of the materials used shall be such that:
(a) under normal use at temperatures up to 8 ° C above or below the reference temperature, the variations in length are not greater than the maximum permissible error;
(b) in the case of gauges which must be used under a certain tractive force, the decrease or increase in that force did not result in a 10% change in the length of the gauge greater than the maximum permissible error.
3. CONSTRUCTION
3.1 Measurements and their additional equipment must be well and thoroughly manufactured and carefully worked.
3.2 The gauge of the gauge shall be of such dimensions and shape as to enable, under normal conditions of use, measurements to be made with the accuracy required for the accuracy class to which the measuring device belongs.
3.3 The end surfaces of the end gauge shall be equal. These end surfaces and markings shall be perpendicular to the longitudinal axis of the gauge.
3.4 The end-surfaces of end-points or composite meters made of wood or of other material, the durability of which is equal to or less than that of the wood, shall be composed of a belt or tip which is resistant to wear and impact and which is appropriately fixed to the gauge.
3.5 Additional devices, such as one or more fixed movable hooks, rings, handles, plates, clamps, lances, retractors or noni, which facilitate and extend the use of the gauge, are permitted provided that they cannot cause confusion. These devices shall be designed and attached to the gauge in such a way that it cannot, under normal conditions of use, increase the accuracy of the measurements in practice.
3.6 The bands shall be so constructed that, if the band is stretched on a flat surface, its edges are practically straight and parallel.
3.7 The retracting device of the belt shall be so manufactured that it cannot cause any permanent deformation of the belt.
4. DIFFERENCE AND NUMBER OF STUDIES
4.1 The measurements shall bear clear, regular and indelible markings and the numbering of the scale throughout their nominal length in such a way as to enable reliable, simple and unambiguous reading. Some non-numbered scale marks, the number of which does not exceed the number of scale marks between the two consecutive scale marks on the gauge, may intervene behind the scale base at the end of the gauge.
4.2 The value of the scale piece shall be equal to 1 x 10n, 2 x 10n or 5 x 10n meters, where the square of n is the whole positive or negative number or zero.
This value shall not exceed:
(a) 1 cm if the nominal length of the gauge is less than or equal to 2 m,
(b) 10 cm if the nominal length of the gauge is greater than 2 m and less than 10 m;
(c) 20 cm if the nominal length of the gauge is greater than or equal to 10 m and less than 50 m;
(d) 50 cm if the nominal length is greater than or equal to 50 m.
However, these values may be exceeded for certain specific uses which are justified when applying for type approval and which must be indicated on the gauge.
4.3. If the marks of the scale are a sign, then they must be straight, perpendicular to the axis of the gauge and have all the same width which is constant along their whole length. The length of these lines shall relate to the corresponding measurement unit. The markings shall be such that they form a clear and understandable scale and that their width does not cause the measurement to be inaccurate.
4.4 The sections of the scale, located near the ends of the gauge, can be further divided into decadent parts of the scale panel value valid for the whole gauge. In this case, the width of the plates may be smaller in the areas of the thickened sections of the scale than in the rest of the gauge.
4.5 The scale marks may also be made up of openings where the value of the scale panel is greater than or equal to one centimetre, or other marks, if the value of the scale panel is greater than or equal to one decimeter, provided that these marks ensure accurate reading, taking into account the accuracy class to which the gauge belongs.
4.6 Numbering can be continuous or repetitive. In the case referred to in point 4.4, numbering in bands with lower scale panel values may differ from numbering in the rest of the gauge. The position, size, shape, colour and contrast of the numbers shall be adapted to the scale and marks of the scale to which they relate.
Notwithstanding the value of the scale panel referred to in paragraph 4.2, the scale marks shall be numbered in metres, decimals, centimetres or millimetres without indicating the corresponding unit marker.
The number of scale marks numbered shall be such that the reading is clear.
If the numbering unit is different from the meter, the scale marks corresponding to the meter may be marked in metres. After the figure for meters then the mark shall be indicated.
In addition, the number of previous metres may be repeated in the same way before otherwise marked scale marks.
If the value of the scale panel corresponds to 2 x 10n and the length of the scale is not less than 2 centimetres, all scale marks shall be numbered.
4.7 If the gauge has more than one scale, the scales may be different and numbering may increase in the same or opposite direction.
5.
5.1 The nominal length of length meters shall be one of the following values: 0.5, 1, 1.5, 2, 3, 4, 5, 6, 7, 8, 9 m or times 5 meters.
5.2. For specific purposes, additional values may be allowed provided that the need to use a measuring instrument of such nominal length is justified at the time of application for type approval and that the specific use for which the measuring instrument is reserved is indicated on the measuring instrument.
5.3 Some of the nominal lengths in point 5.1 are not permitted for the gauges referred to in point 9.4.2.
6. LABEL
6.1 The length gauge shall bear the following markings:
6.1.1. Labelling mandatory in all cases:
(a) nominal length;
(b) the manufacturer's identification mark or its trade name;
(c) identification of the accuracy class: I, II or III;
(d) the EEC type-approval mark.
6.1.2. Labelling mandatory in certain cases:
(a) reference temperature, if different from 20 ° C;
(b) tension force,
(c) specific uses for which the gauge is reserved in the cases referred to in points 4.2 and 5.2.
6.2 The nominal length, voltage and temperature must be expressed in the units of measurement permitted by Decree No xxx / 2000 Coll. or in one of their decadent multiples or parts followed by the corresponding legally authorised mark.
6.3 All these markings shall be visible and legible from the beginning of the gauge.
In agreement with the Czech Metrology Institute, certain markings may appear on the integral parts of the gauge. In this case, the EEC type-approval certificate shall specify where these markings are to be placed.
If the width of the gauge does not permit the EEC type-approval mark to be read, this mark may be affixed, regardless of the provisions of paragraph 3.1 of Annex 1 to Decree No. xxx / 2000 Coll., and in accordance with paragraph 3.5 of this annex, in the form of the following marks listed in the relevant sequence:
- stylized letter ε,
- the distinguishing letter (s) of the Member State which issued the EEC type-approval certificate,
- two last digits of the year of issue of the EEC type-approval certificate,
- the reference number of the EEC type-approval certificate.
6.4 The linear expansion coefficient of the material from which the gauge is made, in the form: α =......, can be displayed solely under the responsibility of the manufacturer.
6.5 In addition, meters may bear non-metrological data provided for in the regulation or permitted by the Czech Metrology Institute.
6.6 Where signs are not coded, they shall be expressed in the official language of the Member States for which the gauges are intended.
6.7 Promotional inscriptions may be on measuring instruments provided that their location complies with the provisions set out in paragraph 6.8.
6.8 The inscriptions, including advertising inscriptions, shall be arranged in such a way that they do not in any way affect the use of the gauge as a gauge. Mandatory markings, with the exception of the EEC type-approval mark and the location of the advertising inscriptions, shall appear on the sample submitted for EEC type-approval.
7. MAXIMAL IMPORTED FISH
The measurements defined in this decree are classified according to accuracy in three classes marked I, II and III.
7.1 Maximum holiday positive or negative error
(a) nominal lengths; or
(b) any distance between any two consecutive scale marks shall be expressed in millimetres as a function of the length observed given by (a + bL), where:
- L is the length of the track, rounded to the nearest greater full number of metres,
- a and b are the coefficients determined for each accuracy class according to the following table:
| Třída přesnosti | a | b |
|---|---|---|
| I II III | 0,1 0,3 0,6 | 0,1 0,2 0,4 |
7.2.1 The maximum permissible positive or negative error of the length of the piece i not exceeding 1 cm shall be determined for each accuracy class according to the following table:
| Délka i sledovaného dílku | Maximální dovolená chyba (v mm) pro třídu přesnosti | ||
|---|---|---|---|
| i < 1 mm 1 mm < i < 1 cm | I | II | III |
| 0,1 0,2 | 0,2 0,4 | 0,3 0,6 | |
For parts whose length exceeds 1 cm, the maximum permissible error shall be expressed as a function of the length of the piece according to the expression (a + bL) mm, where the values of the parameters a and b are equal to those of paragraph 7.1 and where L is the length observed, rounded to the nearest whole number of metres.
7.2.2 The maximum tolerance between lengths and two consecutive sections, the length of which does not exceed 1 cm, shall be determined for each accuracy class according to the following table:
| Délka i sledovaného dílku | Maximální dovolená odchylka (v mm) pro třídu přesnosti | ||
|---|---|---|---|
| i < 1 mm 1 mm < i < 1 cm | I | II | III |
| 0,1 0,2 | 0,2 0,4 | 0,3 0,6 | |
For sections whose length exceeds 1 cm, the maximum tolerance between both lengths and two consecutive sections shall be expressed as a function of the length of the piece according to the expression (a + bL) mm as defined in the preceding paragraph.
7.3 For end-measure or combined measure, the maximum permissible positive or negative error of the end-piece length of the limited area shall be increased by:
- 0,1 mm for Class I gauges;
- 0,2 mm for Class II gauges;
- 0,3 mm for Class III gauges.
The provisions of paragraphs 7.1 and 7.2.2 shall not apply:
(a) if one of the marks not consecutive referred to in point 7.1 (b) is a surface,
(b) if one of the two consecutive sections referred to in the second sentence of paragraph 7.2.2 above is a enclosed area.
7.4 The maximum permissible error in service shall be twice the maximum permissible error at the initial EEC verification.
7.5 Maximum permissible errors are related to the following reference conditions:
(a) the reference temperature shall be normally 20 ° C; for certain measures referred to in point 9, a different reference temperature may exceptionally be accepted,
(b) the gauges for which the tension force is specified in paragraph 9 shall be subjected to tests which shall be carried out over the whole length of the test, practically free of friction, on a horizontal plane and with the tension force indicated on the gauge.
8. MARKS OF THE FIRST EEC VERIFICATION
8.1 In the vicinity of the beginning of the length measure itself or on the additional clamping element, a place shall be reserved which allows the marking of the initial EEC verification to be placed.
8.2 The EEC initial verification mark may consist of a small letter e in a hexagon, where the letter e contains capital letters at the top identifying the Member State in which the initial EEC verification took place and the year of verification at the bottom. An example of such a mark is shown in paragraph 12.
9. MISCELLANEOUS SPECIES OF LONG MEASUREMENT REFERRED TO IN THIS DECLARATION
9.1 End, edging or combined tape gauges made from glass fibre and plastic
The nominal length is between 0,5 and 100 m.
The tension force, approximately 20 N, shall be marked on the gauge.
The free ends of the end and combined gauge shall be provided with a wear-resistant belt or tip.
These gauges belong to the accuracy class I, II or III.
9.2. Solid or semi-solid meters made from one piece of metal or other material
The nominal length is between 0,5 and 5 m.
The reference temperature may in certain cases be different from 20 ° C.
These gauges also include measuring sticks used to check the level of liquids.
The end of a fixed measuring bar shall be fitted with a head or a point resistant to impact and wear. The impact shall not cause a spark.
These gauges belong to the accuracy class I or II.
9.3 Folding meters made from metal or other material
The nominal length is between 0,5 and 5 m.
The sections between connections shall be of equal length.
Their connection and their levelling in open position shall be ensured by an effective device which shall be so designed as not to cause an additional fault in the connection of more than 0,3 mm for gauges in Classes I and II and 0,5 mm for gauges in Class III.
These gauges belong to Classes I, II or III.
9.4 Steel bands
9.4.1 End, marker or combination gauges on retractor
The nominal length is between 0,5 and 10 m; the measuring zones with a nominal length between 5 and 10 m shall have an convex cross-section.
These gauges may be placed in a housing, one dimension of which may be included in the part used for measuring, in particular for measuring internal dimensions; The free end of these meters shall be provided with a fixed or sliding hook or tongue.
These gauges belong to Classes I or II.
9.4.2 End or marking gauges designed to measure lengths greater than the nominal length of the gauge
The nominal length is 5, 10, 20, 50, 100 or 200 m.
The tension force, approximately 50 N, shall be indicated on the gauge.
These gauges shall be equipped with holders or rings at both ends.
If the holders are included in the nominal length, then they shall be designed in such a way that their connection does not introduce any inaccuracy in the measurement.
These gauges belong to Classes I or II.
9.4.3 Ranging or combined measuring instruments on a retractor not designed for measuring lengths greater than the nominal length
The nominal length is between 5 and 200 m.
The reference temperature may in certain cases be different from 20 ° C.
The tension force, approximately 50 N, shall be indicated on the gauge.
The free end shall have a holder, ring or hook which shall not be included in the nominal length.
These gauges belong to Classes I or II.
9.5 Combined meters made of metal, with a tensioning weight, of a kind used as submersible bands for controlling the level of liquids
The nominal length is between 5 and 50 m.
The reference temperature may in certain cases be different from 20 ° C.
Tensioning force, sufficient for correct tension of the band, shall be marked on the gauge.
This tensioning force shall be applied to the gauge by means of tension weights which shall bear the marking of its mass.
The basic mark to which the scale begins shall be made up of the base of the tension load of a suitable shape and material which is not susceptible to forming sparks in impact.
The tension load shall be fixed to the band firmly and inseparably in such a way that this attachment or connection does not introduce any inaccuracy of the measurement.
The scale numbering in millimetres shall be conducted over the entire length of the band and shall continue on one flat side of the tension load.
The other end of the gauge shall be provided with a retractor.
These gauges belong to Classes I or II.
However, the maximum permissible error of this gauge in the position for use with tensioning weights shall never exceed 0,6 mm.
10. EEC TYPE-APPROVAL AND FIRST EEC VERIFICATION
The EEC type-approval and initial EEC verification of the measuring instruments must be carried out in accordance with the procedure laid down in the specific legislation.3)
10.1 EEC type-approval examination
The EEC type-approval examination shall consist, in addition to the examination of the documentation, of an inspection to determine whether the sample submitted complies with points 2, 3, 4, 5, 6 (except for points 6.4), 7, 8 and 9.
10.2 EEC initial verification checks
10.2.1. The checks at the initial EEC verification shall be carried out either with all measured lengths submitted, or with the measured measurements referred to in point 11.
10.2.2. The checks at the initial EEC verification shall consist of a visual inspection of the gauge to determine its conformity with the approved type; This concerns in particular the provisions of points 3.6, 4.1 and 4.3.
10.2.3. In addition, it shall also be verified that the measuring device complies with the requirements relating to maximum permissible errors for nominal length as set out in point 7.
10.2.4. In addition, a check shall be carried out at five different locations randomly distributed on the measuring instrument:
(a) distances between two consecutive marks;
(b) the length of the piece;
(c) the difference between the length of two consecutive sections;
to verify their conformity with the provisions of paragraphs 7.1 (b), 7.2.1 and 7.2.2, as well as with the provisions of paragraphs 7.3 and 9.3, as appropriate.
If the results of the check justify this, the Czech Metrology Institute may reduce or increase the number of checks.
10.2.5. All the above checks shall be carried out under the reference conditions referred to in point 7.5.
11. STATISTICAL CONTROL USED AS CONTROL OF THE FIRST EEC VERIFICATION
If the measuring instruments are manufactured in series and the person responsible for submitting them to the EEC initial verification indicates that they have already been adequately checked, then, at his request, the submitted doses may be subjected to statistical control by a comparison method under the following conditions:
11.1 General
11.1.1. Controlled dose
The controlled dose is made up of length meters which:
(a) are of the same type;
(b) belong to the same class of accuracy;
(c) are produced by the same production process.
The extent of the controlled dose is the number of measure lengths contained in it. The maximum level of the controlled dose for initial EEC verification is 10 000 meters.
11.1.2 Selection
The selection is made by diaphragm measure randomly selected from the controlled dose. The number of length meters in the selection is called the range of selection.
11.1.3 Statistical control by comparison method
Statistical control is a method of comparison where the measure in the selection is classified as defective or free of defect according to the provisions of this decree.
11.1.4. Quality limit (LQ 5)
The limit level of quality is that of the controlled dose submitted which, according to the adoption plan, corresponds to a 5% acceptance probability.
11.1.5 Acceptable quality level (SQL)
The acceptable quality level is a quality level of the controlled dose submitted which, according to the adoption plan, corresponds to a 95% acceptance probability.
11.1.6. Receiving number
In the statistical control by the comparison method, the taking-over number represents the maximum number of faulty measurements found in the selection, which, if achieved, still means accepting the controlled dose submitted.
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Regulation Information
| Citation | Decree of the Ministry of Industry and Trade No. 339 / 2000 Coll. |
|---|---|
| Regulation Type | Order |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 26.09.2000 |
|---|---|
| Effective from | 21.04.2004 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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