The Order of the Ministry of Public Works, Transport and the Environment of 22 December 1994, which regulates the metrological control of the non-automatic weighing instruments, in line with the provided for in the Community Directives on these instruments, lays down the metrological control stages of EC model approval, followed by the EC declaration in accordance with the EC model or verification, and EC verification by unit, at the choice of the manufacturer or his authorised representative established in the European Union.

In accordance with the Resolution of the Council of the European Union of 7 May 1995, which lays down the principles for the harmonisation of legislation and technical standardisation of products placed on the market, only the phases of Metrological control prior to those of market use are the subject of legislative harmonisation by the European Union. On the other hand, the controls of market use, i.e. verification after repair or modification, periodic verification and surveillance and inspection, are not subject to such legislative harmonisation for their implementation, although In view of the need for regular checks on the operation of the instruments, Member States are left to take the specific measures to implement them.

The tests corresponding to the metrological control phases regulated in this Order shall be carried out in accordance with the European standard in 45501:1992. However, since this rule specifies the metrological and technical requirements applicable to all non-automatic weighing instruments, this Order only takes into account the specifications contained in the abovementioned European standard which refer to the tests to be carried out in order to carry out the verification of a type of these instruments, the bridge-scales, also known as large-tonnage scales.

In its virtue, the procedure for informing the Commission of the European Union established by Royal Decree 568/1989, of 12 May, has been complied with:

CHAPTER I

Application field

Article 1. Object and scope.

1. The purpose of this Order is to regulate the metrological control of non-automatic weighing instruments of the scale-bridges installed in a fixed and consistent place on mobile platforms, of maximum equal reach or more than 10,000 kilograms, hereinafter referred to as large tonnage scales, in their phases of verification after repair or modification and periodic verification.

2. The metrological control phases regulated in this Order will apply to the large scale scales used for commercial transactions, the calculation of taxes, duties, taxes, premiums, fines, remuneration, compensation and other similar charges, and for the application of rules or regulations, as well as the conduct of judicial expertise.

Article 2. Execution.

The metrological control of large scale scales will be carried out by the competent public administrations.

CHAPTER II

Verification after repair or modification

Article 3. Repair or modification of large tonnage scales.

The repair or modification of the large tonnage scales can only be performed by a person or entity registered in the Metrological Control Registry, as established by Royal Decree 1618/1985, of 11 of September. Registration in that Register shall require compliance with the requirements set out in Annex I to this Order.

Article 4. Performances of the repairers.

The person or entity that has repaired or modified a large-tonnage scale, once checked for proper operation and whose measurements are within the maximum permissible errors, will again place the seals that you have had to lift to perform the repair or modification.

Article 5. Bound subjects and applications.

1. Once a large tonnage scale has been repaired or modified, the holder must notify the competent public authority of such repair or modification, indicating the purpose of the repair and specification of the substituted elements, in their case, and the adjustments and controls carried out. You must also request verification of the instrument after repair or modification, prior to your new commissioning.

2. The application for verification shall be accompanied by the bulletin set out in Annex II, duly completed, for the purposes of identifying the instrument and its holder.

Article 6. Procedure.

The verification procedure after repair or modification of a large scale scale shall be the procedure determined in Annex III.

However, if, as a result of the repair or modification of a large scale scale, the characteristics of the instrument are substantially altered so that the instrument will no longer fully or partially comply with the requirements essential as referred to in Annex I to the Order of 22 December 1994 governing the metrological control of the instruments of non-automatic weighing, which shall be understood to be a new instrument, and, result, it will have to be overcome for its putting into service again or the EC declaration of conformity with the EC model or verification, or the EC verification per unit, in accordance with the provisions of Article 5 and Annex II to that Order.

Article 7. Conformity.

1. After the verification phase of the large scale scale after its repair or modification, the competent Public Administration shall declare the conformity of the instrument to carry out the weighing function for its purpose, by means of the in the case of the verified instrument or of the installation which supports it, of a verification label which shall meet the characteristics and requirements set out in Annex IV, and the issue of a certificate certifying the verification.

2. Verification after repair or modification shall take the effects of the periodic verification.

CHAPTER III

Periodic Verification

Article 8. Bound subjects and applications.

1. The holders of large-tonnage scales in service used for one of the purposes referred to in Article 1 shall be obliged to carry out periodic verification of their instruments every two years from their entry into service. The use of the device is prohibited in the case that this phase of metrological control is not exceeded.

2. The application for periodic verification shall be accompanied by the bulletin set out in Annex II, duly completed, for the purposes of the identification of the instrument and its holder.

Article 9. Procedure.

The periodic verification procedure for the verification of the maintenance of the metrological characteristics of the instrument and its suitability to perform its weighing function shall be the one determined in Annex III.

Article 10. Conformity.

Exceeded the periodic verification phase of the large scale scale, the competent Public Administration will declare that the instrument is compliant to perform its weighing function, by means of the adhesion, instead of the visible, of the the verified instrument or the supporting installation, of a verification label which shall meet the characteristics and requirements set out in Annex IV, the issue of a certificate attesting to the verification carried out, and the placement of the seals that have been necessary to be lifted to carry out the verification.

CHAPTER IV

Common Provisions

Article 11. Maximum errors allowed.

Maximum permissible errors, once the checks have been carried out for verification after repair or modification and for periodic verification, shall be as set out in Annex III, No 3.

Article 12. Not exceeding the verification.

When a large scale scale does not exceed the verification check after repair or modification or the periodic verification as a result of deficiencies detected in its operation, it shall be put out of service until such deficiencies are remedied, or definitively withdrawn in the event that they are not remedied.

Additional disposition. Large tonnage scales in service.

Large-tonnage scales in service, used for one of the purposes specified in Article 1 and installed prior to the entry into force of the Order of 22 December 1994, for which control is regulated (a) EEC metrology of non-automatic weighing instruments, which have been subject to EC verification checks per unit or which do not have model approval, or which still possess it, have not been subject to the EC declaration of conformity with the model, or EC verification, may be authorised by the Administration Public competent to continue in service, provided that they meet the requirements set out in numbers 2 and 3 of Annex III to this Order and in numbers 1, 2, 8, 9, 10, 12 and 13 of Annex I to the Order of 22 December 1994.

Final disposition. Entry into force.

This Order shall enter into force on the day following that of its publication in the "Official State Gazette".

Madrid, 4 July 1995.

BORRELL FONTELLES

Ilmo. Mr President of the Spanish Metrology Centre.

ANNEX I

Requirements for registration in the Metrological Control Register of persons or entities intending to repair large-tonnage scales.

Persons or entities who intend to repair or modify the large tonnage scales referred to in this Order must be previously registered as authorized repairers in the Metrological Control Registry, Article 8 of Law 3/1985, of 18 March, of Metrology, and in Article 2. of Royal Decree 1618/1985 of 11 September, establishing the Register of Metrological Control.

Enrollment in the Metrological Control Registry will require compliance with the administrative and technical requirements specified below:

1. Administrative requirements.

Persons or entities applying for registration in the Metrological Control Registry as authorized repairers of large tonnage scales must comply with the administrative requirements required by the Royal Decree 1618/1985, of 11 September, for which the Register of Metrological Control is established.

2. Technical requirements.

In addition to compliance with the aforementioned administrative requirements, it will also be essential for the registration that the repairer has not only the technical and human resources necessary to be able to carry out his work, but also of the following technical means that allow you to make the contrast of the instrument once repaired and ensure the goodness of the repair:

-A set of high-range weights whose total weight is not less than 20,000 kilograms. The maximum relative errors of each weight must be based on the number of divisions of the large scale scale to be verified.

-A set of weights of nominal values 1, 2, 5, 10, 20, and 50 kilograms of precision M2 or higher, which make a total of 500 kilograms.

-The means and devices necessary for the transport of the weights and the application of the weights on the load receiver of the scale.

(ANNEX II OMITTED)

ANNEX III

Large-tonnage scales verification procedure

The procedure for verifying a large scale scale will consist of the procedures set out below, and it is understood that the failure to overcome one of them will mean that the verification and the unable to perform the following.

For the purposes of the technical content of this Annex, the terminology used is that of the International Organization of Legal Metrology.

1. Administrative examination.

The administrative examination shall consist of the complete identification of the instrument and the verification that it meets the requirements required to be legally in service. It shall be carried out on the basis of the information provided by the applicant in the identification bulletin set out in Annex II. It shall be determined, in particular, that the instrument has the EC model approval, the identification plate of characteristics and the accreditation of having either exceeded the EC declaration in accordance with the model, or the EC verification, or, in its case, EC verification per unit.

If the competent Public Administration checks the existence of anomalies or deficiencies in the data referred to, it shall notify the holder of the instrument to be subsane within the time limit set. However, the existence of anomalies or deficiencies in the aforementioned data shall not interrupt the verification control requested, although it may determine the performance of the inspection activities.

2. Metrological examination.

2.1 General requirements for test execution.

2.1.1 The determination of errors should be made in stable testing conditions. The temperature is considered to be stable when the difference between the extreme temperatures recorded during the test does not exceed 1/5 of the temperature range of the instrument considered, without being greater than 5 ° C and the gradient does not exceed 5 ° C. ° C per hour.

2.1.2 The instruments using the electrical energy must normally be connected to the electric current and in the "on" position during the tests.

2.1.3 Instruments whose design so permits must be previously leveled in their reference position. 2.1.4 Before carrying out the weighing test, the large scale scale shall be charged to the Max or Lim values if the latter is defined.

2.1.5 After each test, the instrument must have sufficient recovery time before the next test.

2.1.6 The working weights used during the verification control may only have an error less than or equal to 1/3 of the maximum error allowed for the large scale scale on the load considered.

2.1.7 Constant replacement loads can be used instead of standard weights, provided that at least the standard weights corresponding to 50 per 100 of the Max value are used. Instead of Max's 50 per 100, the set of pattern weights can be reduced to:

-35 per 100 Max, if the repeatability error does not exceed 0.3 e.

-20 per 100 Max, if the repeatability error does not exceed 0.2 e.

The repeatability error has to be determined with a load of approximately 50 per 100 Max, placed three times over the load receiver.

2.2 Essays.

The tests to carry out the verification of the large tonnage scales will be as follows:

2.2.1 weighing test.

This test is intended to obtain the characteristic curve throughout the measurement field, as well as the determination of the indication errors for the loads tested.

The test loads will be applied from zero to Max inclusive, and will be removed in decreasing order again reaching zero. At least five different test loads should be selected. The selected test loads must include the Max and Min, as well as those values in which the maximum permissible error changes.

When weights are loaded or unloaded, the load must be progressively increased or decreased.

If the instrument is fitted with an automatic zeroing device or a zero-maintenance device, this device may be in operation during the tests. In this case the error in the zero will be determined by taking the indication out of the automatic range (for example, with a load equal to 10 e). The additional load shall then be determined for which the indication is changed from one step to the immediately higher step and the error is calculated in accordance with the description given in the following paragraph. The error at zero load is considered to be equal to the error of the load considered.

Calculation of errors:

For instruments with a numerical indication and without a device to obtain the indication with a lower step (no greater than 1/5 e), the points of change must be used to determine the indication of the instrument before of rounding, as follows:

For a certain load, L, the indicated value is noted, I. Additional weights are added successively, for example, 1/10 of e, until the indication of the instrument increases in a non-ambiguous manner a step (I + e). The additional load increased L added on the load receiver gives the indication, P, before rounding using the following formula:

P = I + 1/2 e-increment L

The error before rounding is:

E = P-L = I + 1/2 e-increment L-L

The corrected error before rounding is:

Ec = E-Eo < = emp

Where E is the error calculated at zero or at a load close to zero (for example, 10 e).

2.2.1.1 weighing test using replacement material:

Check the repeatability error for a load of Max 50 per 100 and determine the number of substitutions allowed according to 2.1.7.

Apply the test loads from scratch to the maximum amount of standard weights inclusive.

Determine the error and then remove the weights until reaching either the null load indication, or in the case of an instrument with a zero maintenance device, the indication of, for example, 10 e.

Replace previous weights with replacement material until you reach the same point of change used to determine the error. Repeat the previous procedure until the Max of the instrument is reached.

Download to zero in reverse, that is, remove the weights and determine the point of change. Replace the weights and remove the replacement material until the same point of change is obtained. Repeat this procedure until the null load indication.

Similar procedures can be applied that lead to equivalent results.

2.2.1.2 Additional weighing test:

For instruments with initial zero-entry devices having a range greater than 20 per 100 Max, an additional weighing test must be performed, using the upper limit of the range as a zero point.

Test requirements.

The error of each heavy result, for the load considered, must be less than or equal to the maximum permissible error set in paragraph 3.

2.2.2 Tara Essay.

This test is intended to check the displacement effect of the characteristic curve when the tare device is acting.

The weighing tests (according to 2.2.1) must be performed at least with two different tare values. At least five load values must be selected. These values must include values close to the Min, the values for which the maximum allowed error changes, and the value closest to the maximum possible net load.

If the instrument is equipped with a tare additive device, one of the weighing tests must be carried out with a value of tare near the maximum additive effect of tare.

If the instrument is provided with an automatic zero-setting device or a zero-maintenance device, it may be up and running during the test. In this case the error at zero point should be determined as indicated in 2.2.1.

Test requirements.

The error of each heavy result, for the net load considered, must be less than or equal to the maximum permitted error set out in paragraph 3.

2.2.3 Repeatability Test.

The purpose of this test is to check the ability of the large-tonnage scale to supply identical results for the same load, placed and displaced several times on the instrument.

Two series of heavy ones will be performed, one with a load close to 50 per 100 of the Max and another one close to 100 per 100 of the Max. Each series must consist of at least three heavy ones.

The readings must be taken when the instrument is loaded and when the downloaded instrument has returned to the rest between heavy. In the event that there is a zero deviation between the heavy ones, the instrument must be set to zero, without determining the error of zero. The true zero position does not need to be determined among the heavy ones.

If the instrument is fitted with an automatic zero-maintenance or zero-maintenance device, it must be up and running during the test.

Test requirements. The error of each heavy result must not in itself exceed the maximum permissible error for the given load, as set out in paragraph 3.

The difference between the results of several heavy loads of the same load should not be greater than the absolute value of the maximum permissible error of the instrument for that load, as set out in paragraph 3.

2.2.4 Eccentricity Assay.

This test is intended to check the results that are obtained by placing the same load by modifying the application point.

Large weights should preferably be used instead of numerous small weights. Smaller weights should be placed on top of the major weights, but unnecessary stacking should be avoided in the area to be tested. The load should be applied focused on the area if a single weight is used, but it will be applied evenly over the area if several small weights are used.

The location of the load should be indicated in a sketch that will be attached to the assessment report.

If the instrument is provided with zero automatic or zero maintenance, it must not be operational during testing.

If an instrument is designed in such a way that loads can be applied in different ways, it may be convenient to perform a minimum of two of any of the following tests:

a) Instrument with a load receiver that has no more than four support points.

A load corresponding to 1/3 of the sum of the maximum range and the corresponding maximum additive effect must be applied.

Each of the four zones whose surface is approximately equal to 1/4 of the total surface of the load receiver must be loaded successively.

b) Instrument with a load receiver that has more than four points of support.

In an instrument with a load receiver having support points, n > c) Instruments used for weighing of rolling loads.

In an instrument used to weigh rolling loads (e.g. vehicle scale), a rolling test load corresponding to the commonly used rolling load shall be applied at different points of the load receiver. heavier and concentrated than may be weighed, but not exceeding 0,8 times the sum of the maximum range and the maximum additive effect of tare.

A rolling load must be applied to different load receiver positions. These positions must be the beginning, the middle and the end of the load receiver in the normal direction of driving. Then, the positions in the opposite direction must be repeated.

Test requirements.

The indications obtained for different positions of a load must comply with the maximum permissible errors set out in paragraph 3, when the instrument is tested according to the procedure laid down in the paragraphs previous.

2.2.5 Mobile-sensitivity test.

This test is intended to check the ability of the large scale scale to respond to small load variations.

The following tests must be performed with three different loads, for example: Min, 1/2 Max and Max.

2.2.5.1 Mobility test.

a) Non-automatic balancing instrument and analog indication.

A supplementary load equivalent to 0.4 times the absolute value of the maximum error allowed for the load considered, while the instrument is in equilibrium, must be gently placed or removed from the load receiver.

b) Semi-automatic or automatic balancing instrument.

Analog:

An extra charge equivalent to the absolute value of the maximum error allowed for the load considered must be withdrawn or deposited without a brusqueness of the instrument.

Digital Indication:

The load receiver must be placed at a load more than enough additional weights (for example, 10 times 1/10 d). Then the additional weights must be removed successively until the indication, I, decreases in an unambiguously manner in a real step, I-d. Next, one of the additional weights is placed again and an extra load equal to 1.4 d must be placed gently on the load receiver and give an increased result in a step above the initial indication, I + d.

Test requirements.

a) Non-automatic balancing instrument.

By gently removing or depositing the supplemental load from the balancing instrument, a visible movement of the indicator organ must be caused.

b) Semi-automatic or automatic balancing instrument.

Analog:

When the extra load is removed or deposited, a permanent displacement of the indicator organ, corresponding to at least 0.7 times that extra load, must be caused.

Digital Indication:

When the extra load is removed or unbrusqued, the indication must be changed to a value corresponding to the value of the initial indication increased by one step.

2.2.5.2 Sensitivity test of a non-automatic balancing instrument.

During this test the instrument should oscillate normally. It should be placed on the instrument, while the load receiver is still in swing, a supplementary load equal to the maximum error value allowed for the applied load. In instruments with damping, the supplementary load must be applied with a slight impact. The linear distance between the average points of this reading and the reading without supplementary load should be taken as the permanent displacement of the indication. The test must be carried out with a minimum of two different loads (e.g. zero and Max).

Test requirements.

When placing the extra load on the instrument, a permanent displacement of the indicator organ of at least 5 millimeters must be caused.

3. Maximum errors allowed in service.

To verify the maintenance of the metrological characteristics of the large tonnage scales, the conformity of the results obtained according to the following table shall be verified:

Maximum Errors

allowed in service/For loads "m" expressed in verification steps: Class (III)/Class (IV)

+-1 e/0 < = m < = 500/0 < = m < = 50

+-2 e/500 < m < = 2,000/50 < m < = 200

+-3 e/2,000 < m < = 10,000/200 < m < = 1,000

4. Comments and recommendations.

If during the performance of the metrological examination, the verifier verified in the large scale the existence of subsable deficiencies that, without affecting the goodness of the measures, could be decisive of non-compliance with the requirements laid down for the instrument, shall notify in writing such facts to its holder, setting a time limit for its remedy. Where the deficiencies have not been remedied within the prescribed period, the competent public authority shall inform the competent authority of the competent authority.

ANNEX IV

Verification Tags

In order to prove compliance with verification after repair or modification and periodic verification, as referred to in this Order, the competent Public Administration shall issue for each large scale scale verified with positive results a verification label, whose characteristics, format and content, shall be as follows:

It will be made up of a material resistant to atmospheric agents.

It will be of an adhesive type, so that it can be fixed permanently and easily visible in the instrument or some element of the installation that supports it.

It will be self-destructive in its detachment.

It will have a rectangular shape and its dimensions will be at least 100 x 60 millimeters.

Your content will be the one set in the following chart:

(GRAPHIC OMITTED)

The letters and the series of digits appearing at the top of the table indicate the months and years, respectively, which must be drilled to those corresponding to the month and year in which the verification was performed.

The letters and series of digits at the bottom right of the box also indicate months and years, and those in which the validity of the verification has expired must be drilled.

The label must include the identification number and the stamp of the body that has performed the verification.