The manufacturer shall specify the nominal operating conditions of the measuring instruments as follows:

1.1

For the measurement:

The extent of measurement of the instrument in terms of maximum and minimum scopes.

1.2

For the influence sizes of the power supply:

In case of ac power supply: the rated AC power voltage or AC voltage limits.

In the case of dc power supply: the nominal and minimum DC supply voltage, or the DC voltage limits.

1.3

For mechanical and climatic influence sizes:

The minimum temperature range is 30 ° C, unless otherwise specified in Annexes 2 to 5.

The mechanical environment classes provided for in Annex 1, c. 1.3.2, of the Ordinance on Measuring Instruments, does not apply. The manufacturer shall define the mechanical conditions for the use of the instruments which are subjected to a particular mechanical stress, for example the instruments integrated into vehicles.

1.4

For other influence sizes (if applicable):

The operating speed (s).

Characteristics of the product (s) to be weighed.

The required performance and the critical variation value are indicated in the specific annexes 2, 3, 4, or 5, corresponding to each type of instrument.

3.1

Measures shall be provided to limit the effects of inclination, loading and operating speed in such a way that maximum tolerated errors (MTRs) are not exceeded under normal operating conditions.

3.2

Adequate material handling facilities should be provided to enable the device to meet EMT during normal operation.

3.3

Any operator command interface must be clear and efficient.

3.4

The integrity of the display (if any) must be verified by the operator.

3.5

An appropriate zero-setting function should be provided to allow the device to meet EMT during normal operation.

3.6

Any result outside the scope of measurement must be identified as such, when printing is possible.

1.1

Weighing devices are further divided into primary categories designated by X or Y as indicated by the manufacturer.

1.2

These categories are subdivided into four categories of accuracy:

2.1

Category X shall apply to the instruments used to verify the prepackaging made in accordance with the provisions of Council Directives 75 /106/EEC of 19 December 1974 on the approximation of the laws of the Member States relating to the Volume preconditioning of certain pre-packed liquids ¹ Of 20 January 1976 and 76 /211/EEC of the Council concerning the approximation of the laws of the Member States relating to the mass or volume preconditioning of certain products in prepackages ² .

2.2

The accuracy classes are supplemented by a factor (x), which quantifies the maximum tolerated deviation as specified in the c. 4.2.

The manufacturer must specify the factor (x), (x) being £ 2 and having the form 1 × 10 ^K , 2 × 10 ^K Or 5 × 10 ^K , where k is an integer negative or equal to zero.

Category Y applies to all other automatic labeller-labellers.

4.1

Medium error for weighing instruments of category X or EMT for category Y instruments

Table 1

4.2

Standard Deviation

The maximum permissible value for the standard deviation of an instrument of class X (x) is the result of multiplying the factor (x) by the value indicated in Table 2 below.

Table 2

4.3

Verification scale-simple-scale instruments

Table 3

4.4

Verification scale-multiple-level instruments

Table 4

When specifying the extent of measurement for Class Y devices, the manufacturer shall take into account that the minimum scope shall not be less than:

6.1

The dynamic adjustment device shall operate on a load range specified by the manufacturer.

6.2

When the scooter is equipped with a dynamic adjustment device that compensates for the dynamic effects of the moving load, it must be neutralized for operation outside the load range and must be able to be protected.

7.1

TRAs due to influence factors are:

7.1.1

For category X instruments:

-

In automatic operation, the values shown in Tables 1 and 2;

-

For non-automatic static weighing, the values shown in Table 1;

7.1.2

For category Y instruments:

-

For each automatic load, the values shown in Table 1;

-

For non-automatic static weighing, the values shown for class X in Table 1.

7.2

The critical change value due to a perturbation is a verification scale interval.

7.3

Temperature Range:

-

For classes XI and Y (I), the minimum range is 5 ° C;

-

For classes XII and Y (II), the minimum range is 15 ° C.

Weighing devices are divided into four accuracy classes:

0.2 0.5 1 2

Table 1

The aggregation level (d _T ) Must be in scope:

0.01 % Max ≤d _T < 0.2 % Max.

Minimum total load (Ó _Min ) Must not be less than the load for which the EMT is equal to the aggregation level (d _T ), or less than the minimum load specified by the manufacturer.

Devices that do not perform the tare after each unloading must be equipped with a zeroing device. Their automatic operation shall be made impossible if the indication of zero varies from:

The adjustments made by the operator and the reset function must be made impossible during automatic operation.

On instruments equipped with a printing device, the reset of the total shall be made impossible until the total is printed. The printing of the total must be done in the event of an interruption of automatic operation.

8.1

TRAs due to influence factors are as shown in Table 2.

Table 2

8.2

The critical change value due to a disturbance is a totalization step for any weight indication and total memory.

Weighing devices are divided into three classes of accuracy:

0.5 1 2

2.1

The manufacturer shall specify the extent of measurement, the ratio between the minimum net load on the weighing unit and the maximum range, and the minimum total load.

2.2

The minimum total load (Ó _Min ) Must not be less than:

-

800 d for class 0.5;

-

400 d for Class 1;

-

200 d for class 2.

D is the totalization step of the general totalization device.

Table 1

The tape speed must be specified by the manufacturer. For constant-speed banders and variable speed banders with manual control of speed, the speed shall not vary by more than 5 % of the nominal value. The product must not have a speed different from the speed of the tape.

It should not be possible to reset the generalization device to zero.

6.1

The EMT due to a factor of influence, for a load not less than to _Min , must be 0.7 times the appropriate value given in Table 1, rounded up to the nearest aggregation level (d).

6.2

The critical change value due to a disturbance must be 0.7 times the appropriate value given in Table 1, for a load equal to _Min , for the designated class of the weighing on tape, rounded up to the top level (d).

Weighing devices are divided into four accuracy classes:

0.2 0.5 1 2

2.1

The TRAs for the movement of a single car or an entire train are the values shown in Table 1.

Table 1

2.2

The TRMs for the movement of hooked or unhung cars must be the largest of the following:

-

The value calculated in accordance with Table 1, rounded to the nearest level;

-

The value calculated in accordance with Table 1, rounded to the nearest level, for a weight equal to 35 % of the maximum weight of the car (as shown on the identifying indications);

-

A step (d).

2.3

TRAs for moving a train are the largest of the following:

-

The value calculated in accordance with Table 1, rounded to the nearest level;

-

The value calculated in accordance with Table 1, for the weight of a single car equal to 35 % of the maximum weight of the car (as shown on the identifying indications), multiplied by the number of reference cars (not exceeding 10) of the train and rounded At the nearest level;

-

A step (d) for each carriage of the train, not exceeding 10 d.

2.4

When weighing rail cars, errors of up to 10 % of the weighing results obtained in one or more passages of the train may exceed the EMT indicated in c. 2.2, but shall not exceed twice the EMT.

The relationship between the accuracy class and the step is as shown in Table 2.

Table 2

4.1

The minimum scope shall not be less than 1 t or greater than the result of the division of the minimum weight of the car by the number of partial weighings.

4.2

The minimum weight of the car shall not be less than 50 d.

5.1

The TRM due to an influence factor is as shown in Table 3.

Table 3

5.2

The critical variation value due to a disturbance is one step.

Weighing devices are divided into six accuracy classes:

0.2 0.5 1 2 5 10

2.1

Weighing in Motion

The EMT for weighing the vehicle shall be the largest of the following:

A.

Value calculated on the basis of Table 1, rounded to the nearest level;

B.

1 d ' The number of weights in the summation in the case of initial verification, 2 d ' The number of weights in totalization in the case of in-service inspection.

Table 1

2.2

Static Weigh

Static weighing scales for increasing or decreasing loads should be the appropriate values in Table 2.

Table 2

For a particular method of weighing in motion and the combination of load receivers, all indicator devices and weight printers on an automatic weighing instrument to determine the total weight of vehicles On-road hauliers must have the same level d.

The ratio between the accuracy class, the value of the step and the maximum vehicle weight expressed in the echelons shall be as specified in Table 3.

Table 3

The steps of the indicator or printer devices shall be in the form of 1 × 10 ^K , 2 × 10 ^K Or 5 × 10 ^K , where k is a positive or negative integer or zero.

The minimum scope shall not be less than the load, expressed in increments, specified in Table 4.

Table 4

The loads on individual axles or on group of axles shall not be indicated or printed without associated warning indicating that these results do not arise from the verification of the weighing instrument.

For the same load, there must be no difference between the weighing results provided by each of these two types of devices having the same level.

Automatic weighing instruments to determine the total weight of on-motion road vehicles shall comply with the appropriate metrological and technical requirements for ambient temperatures between -10 ° C And +40 ° C. However, for special applications, the limits of the temperature range may differ as long as this range is not less than 30 ° C and is specified on the nameplate.

1

If subsequent verifications of an automatic operation scale prove, in two successive verifications, that it complies with the maximum tolerated errors, the Federal Institute of Metrology ¹ May grant an extension of the subsequent audit period up to a maximum of three years.

2

The user who benefits from an extended period of verification is required to check the weighing device each year to verify the stability of measurement.

3

The controls must be the subject of minutes to be submitted to the executing agency during the next audit.

4

If a check shows that the weighing instrument no longer complies with the maximum permissible errors, this information must be announced without delay to the implementing body. The weighing instrument shall be adjusted and verified by the implementing body.

5

If the audit period is found to be too long, it may be reduced to a minimum of one year.