Decree of the Ministry of Industry and Trade No. 249 / 2001 Coll.
Decree of the Ministry of Industry and Trade laying down requirements for automatic control and sorting weighing equipment marked with EEC mark
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Effective from 21.04.2004
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249
DECLARATION
Ministry of Industry and Trade
of 22 June 2001
laying down requirements for automatic EEC-marked control and sorting weighing devices
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 lays down requirements for automatic weighing and control equipment. This decree does not apply to automatic weighing machines for the calculation of the price of goods and to the printing of documents on the price and grading of eggs.
Automatic control and grading weighing devices 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 separate legislation, (2) only if they comply with the requirements set out in the Annex to this Regulation, which have been verified by the procedures laid down in the separate 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. 249 / 2001 Coll.
REQUIREMENTS FOR AUTOMATIC CHECKING AND CLAIMING OF EQUIPMENT
1. GENERAL DEFINITIONS
Automatic control and grading weighing equipment divides the weighted goods into two or more subgroups by weight.
1.1. Control weighing equipment
Weighing machinery which separates weighted goods whose weight differs from a predefined value called nominal weight.
The function of the weighing device shall be to divide the weighted goods into two or more subsets according to the value of the difference between its weight and the nominal weight.
1.2. Sorting weighing equipment
Devices which divide weighted goods by different weights for which there is no predefined nominal mass.
The function of weighing devices for weight grading, hereinafter referred to as "sorting scales', is to divide the weighted goods into several subgroups, each of which is characterised by a given weight range.
2 TERMINOLOGY
2.1. Breakdown by control or grading methods
2.1.1. Weighing equipment dividing the pieces of weighing goods into different groups leaving the weighing equipment separately.
2.1.2. A weighing device dividing the pieces of the weighing goods by placing a different mark on each piece of the goods, indicating the group to which that piece belongs.
2.1.3 Weighting devices which calculate the pieces of the weighted goods in each group without dividing them.
2.1.4 Weighting devices which give an optical or acoustic signal for each piece of weighing goods in the group without distributing them.
2.2. Breakdown by activity method
2.2.1 Continuous operating control and sorting scales
Weighting device with continuous movement of the weighted product.
The movement of the weighted product on the load carrier is continuous and information on the weight is available during this movement.
2.2.2 Discontinuous control and sorting scales
Weighting device with a discounted movement of the weighted product.
The movement of the weighted product on the load carrier is incoherent and the weight information is available when the weighted product is at rest.
2.3 Equipment included in the scales
2.3.1. Measurement system
2.3.1.1. Weighting unit
Device providing information on the mass to be checked or sorted. This device may consist partly or fully of non-automatic scales.
This device shall include a load carrier, a balancing mechanism and a device indicating the load weight value or the difference between that value and the reference value in mass units.
2.3.1.2 Trigger devices
A device that gives the order to issue mass information.
2.3.1.3 Data evaluation equipment
A device that converts data from a weighing unit to a signal and processes that signal to send a control or sorting order.
2.3.1.4 Indicator
Equipment providing at least one of the following information:
- weight of the control or sorted load,
- the difference between that weight and the reference value,
- the subgroup to which the control or sorting load belongs.
2.3.2. Transport equipment
Load shift device for load carrier and load carrier.
This device may be part of the weighing unit.
2.3.3 Adjusting device
Devices for determining mass limits of subsets.
2.3.4. Sorting equipment
Device by which the load is automatically distributed into physically separate subsets. This device may not be part of the weighing device.
2.3.5 Correction equipment (feedback servo-mechanism)
A device which automatically adjusts the adjustment of the filling device to the control weighing device, depending on the weighing results.
2.3.6.
Equipment indicating the sum of loads that have moved through the load carrier (sum counter) or the sum of loads in each subgroup.
2.4 Etalon test load
An etalon test load is a load by which an etalon indecision zone (Us) is tested under the conditions specified in 7.2.1.1.
2.5 Metrological properties
2.5.1 Nominal setting point
The value expressed in units of mass, preset by means of a setting device to determine the limit which separates consecutive subsets.
2.5.2 The actual setting point
Value expressed in mass units, in respect of which two different decisions of equal probability can be obtained for the same load.
2.5.3 Settings range
The extent to which the nominal setting point can be set to the nominal value of the load weight.
2.5.4 Settings interval (width of subgroup)
Interval expressed in mass units between consecutive nominal settings.
2.5.5. Setting Error
The difference between the value of the nominal and the actual setting point.
2.5.6. Weight category
Sub-group of loads falling within a given weight range. If n points are set, then the full load range, from zero to infinity, is divided into (n + 1) categories of mass.
2.5.7. Minimum gravity
The value of the load under which the machine is unable to correctly identify and classify the load into the subgroup to which it belongs.
2.5.8 Zone of indecision
The range expressed in mass units in which the machine's decision is unclear.
2.5.8.1 Standard indecision zone (Us)
The range declared by the manufacturer and expressed in mass units in which the weighing device for the etalon test load and the rate of action can make two different decisions.
2.5.8.2. Nominal indecision zone (Un)
The range declared by the manufacturer and expressed in mass units in which the weighing device for the product and the speed of operation can make two different decisions.
2.5.8.3. Actual indecision zone (Ua)
The extent determined by the Czech Metrology Institute or the relevant metrological authority of the Member State and expressed in mass units in which the machine for the etalon test load or the product and speed of activity can make two different decisions.
Its conventional value is equal to the standard deviation (from -3 to + 3).
2.5.9 Control or sorting speed (operating speed)
Number of loads checked or sorted per unit of time.
2.5.10 Load length
Load length measured in the direction in which the load moves.
2.5.11 Time of weighing
Time elapsed between the moment when the load is complete on the load carrier and the moment when the mass information is available.
2.5.12 Response time
Time elapsed between the moment when the load is complete on the load carrier and the moment when the immediate response of the weighing unit differs from the final response by less than Un.
METROLOGICAL CHARGEMENTS
3. GENERAL METHOLOGICAL REQUIREMENTS
3.1 Value of the weighing unit scale piece
If the weighing unit has an indicator device with a scale divided into units of mass, then the value of the scale panel and the value of the verification panel shall comply with the requirements laid down in the specific legislation.3)
3.2 Maximum standard indecision zone
Without prejudice to the requirements of paragraph 5.1.2, the standard indecision zone (Un) shall not exceed:
- 1 g for loads up to and including 100 g,
- 1% for loads of more than 100 g rated weight.
3.3 Relationship between nominal and standard indecision zone
The rated indecision zone (Un) shall not be less than the standard indecision zone (Us).
4. MAXIMAL IMPORTED FISH
4.1 Maximum permissible errors for EEC type-approval
4.1.1. Weighting unit
If the weighing unit has an indicator device with a scale divided by units of mass, then it shall be considered as an automatic weighing device and shall comply with the requirements laid down by the specific legislationm3 in static tests) concerning the maximum permissible errors for those weighing devices.
4.1.2 Actual indecision zone (Ua)
The actual indecision zone determined during the tests carried out in accordance with paragraph 5 shall not exceed 0,8 times the standard indecision zone (Us).
4.1.3. Setting Error
The setting error shall not exceed 0.5 times the standard indecision zone (Us).
4.1.4 Change the actual time setting point
The change in the actual setting point shall not exceed 0.5 times the standard indecision zone (Us) during the 8-hour period.
4.1.5 Change the actual setting point with temperature
The change in the actual setting point shall not exceed 0.5 times the standard indecision zone (Us) for the temperature difference of 5 ° C.
4.1.6. Effect of eccentric load
If the load can be placed eccentrically, the maximum difference between the mass values necessary to obtain the equilibrium position at a load equal to the minimum load shall not exceed 0.5 times the standard indecision zone (Us) whenever the load is placed on the load carrier.
4.2 Maximum permissible errors for initial EEC verification
4.2.1. Weighting unit
If the weighing unit has an indicator device with a scale divided by units of mass, then it shall be considered an automatic weighing device and shall meet the requirements of a specific legal transcription in static tests (3) concerning the maximum permissible errors for such weighing equipment.
4.2.2 Actual indecision zone (Ua)
The actual indecision zone determined during the tests carried out in accordance with paragraph 5 shall not exceed 0,8 times the rated indecision zone (Un).
4.2.3 Settings error
The setting error shall not exceed 0.5 times the rated indecision zone (Un).
4.2.4 Change the actual time setting point
The change in the actual setting point shall not exceed 0,5 times the rated indecision zone (Un) during the 8-hour period.
4.2.5 Change the actual setting point with temperature
The change in the actual setting point at a temperature difference of 5 ° C shall not exceed 0,5 times the rated indecision zone (Un).
4.3 Maximum permissible errors in operation
4.3.1. Weighting unit
If the weighing unit has an indicator device with a scale divided into units of mass, then it shall be considered as an automatic weighing device and shall comply with the requirements of the Special Legislative Regulation (3) in static tests, which shall refer to the maximum permissible errors for these weighing devices.
4.3.2 Real indecision zone (Ua)
The actual indecision zone determined during the tests carried out in accordance with paragraph 5 shall not exceed the rated indecision zone (Un).
4.3.3. Setting Error
The setting error shall not exceed 0.5 times the rated indecision zone (Un).
5. CONDITIONS FOR THE USE OF MAXIMAL AUTHORISED HAIR
5.1. Normal conditions of use
5.1.1. Weight of weighted products
The weight of the weighted products shall be within the range between the maximum and the minimum weights.
5.1.2. Minimum gravity
The minimum gravity shall not be less than:
25 Un for Un ≤ 200 mg,
50 Un for 200 mg < Un ≤ 500 mg,
100 Un for 500 mg < Un
5.1.3. Time of weighing
The weighing time shall be greater than or equal to the response time and less than or equal to the time during which the load is complete on the load carrier. This requirement may be circumvented if the design or operation of the installation permits.
For all speeds of less than or equal to the maximum operating speed, the setting error and the area of indecision shall remain less than or equal to the values referred to in point 4.
5.2 Effects
5.2.1. Temperature
The device shall comply with the requirements of paragraph 4 at all near-constant temperatures of at least 25 ° C.
If the device is intended for operation under controlled temperature conditions, the temperature range may be reduced to 10 ° C.
The temperature shall be considered almost constant if both of the following requirements are met:
- the difference between the extreme temperatures recorded during the test does not exceed 5 ° C,
- the temperature change shall not exceed 1 ° C in five minutes.
5.2.2 Power supply
The actual setting point and the actual indecision zone (Ua) shall meet the requirements of paragraph 4 for the following changes to the power supply:
From - 15% to + 10% of rated voltage; and
From - 2% to + 2% of nominal frequency.
5.2.3 Other factors affecting
The weighing device shall comply with the requirements of paragraph 4 if it is exposed to influences of factors other than those referred to in paragraphs 5.2.1 and 5.2.2 resulting from the conditions of its installation and the intended use.
6. GENERAL TECHNICAL REQUIREMENTS
6.1. Operational capacity
The weighing device shall be designed to satisfy the use to which it is intended.
6.2 Random incorrect settings
The weighing device shall be so designed that, under normal circumstances, the incorrect setting is unlikely to interfere with their operation without easily detectable.
6.3. Oscillation absorber (silencer)
Oscillation dampers whose characteristics are affected by temperature change up to such a degree that the operation and accuracy of the machine are outside the prescribed limits shall be equipped with an automatic compensation device.
It shall be indicated that the device is operating at the correct temperature.
The oscillation silencer shall not be readily accessible to unauthorised persons.
6.4 Carrier
If the conveyor contains belts, strips or chains designed to transport the weighted products to the load carrier and if those belts, strips or chains are fixed by means of voltage control devices, then, if this voltage may affect the mass information obtained from the weighing unit, these devices shall not be readily accessible.
6.5 Balancing
6.5.1. The weighing device shall be maintained in the reference (untilled) position.
6.5.2. If the weighing devices are portable, they shall be equipped with a balancing device and a position indicator or, in the case of tilting in the longitudinal or transverse direction, shall meet the requirements referred to in point 4 by 5%.
6.5.3 Where a position indicator is supplied to achieve compliance with paragraph 6.5.2, the sensitivity of the position indicator shall be such that its moving indication part shows at least 2 mm when tilting.
6.6 Balancing and adjusting devices
It shall be possible to set the control elements of the equilibrium device and the adjusting device within at least one quarter of the rated zone of indecision, irrespective of whether the weighing device is loaded or not, according to its operating method.
6.7 Removable masses
The removable masses shall be either a mass of the median or higher accuracy class according to the relevant requirements of the Special Legislative Regulation (3) or a specially manufactured mass which can be distinguished from and identifiable with the device.
6.8 Descriptive markings
6.8.1 Mandatory markings
The weighing device shall bear the following marking:
| – identifikační značku výrobce, | |
| – identifikační značku dovozce, | |
| – výrobní číslo a označení typu zařízení, | |
| – značku EHS schválení typu, | |
| – maximální váživost | max..................................................... |
| – minimální váživost: | min. ................................................... |
| – jmenovitou zónu nerozhodnosti: | Un ..................................................... |
| – rychlost činnosti: | ......................... počet zátěží za minutu |
| – dobu odezvy: | t .....................................................s |
| – hodnotu ověřovacího dílku stupnice vážicí jednotky podle požadavků zvláštního právního předpisu3) | |
| – meze teploty: | ....... °C/ ....................................... °C |
| – napětí elektrického zdroje: | ...................................................... V |
| – frekvenci elektrického zdroje: | ......................................................Hz |
| – identifikační značku na částech zařízení, které nejsou přímo připojeny k hlavní jednotce. | |
6.8.2 Additional indications
According to the specific use of weighing equipment, the Czech Metrology Institute or the competent metrology authority of the Member State issuing the EEC type-approval certificate may require one or more additional markings.
6.8.3 Location of descriptive markings
The marking shall be unremovable and shall be of such size, shape and clarity as to allow easy reading under normal conditions of use of the weighing device.
This marking shall be grouped on scales in an easily visible place, either on a label with nominal values attached to the indicator device or on the indicator device itself.
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Regulation Information
| Citation | Decree of the Ministry of Industry and Trade No. 249 / 2001 Coll., laying down requirements for automatic control and sorting weighing equipment marked with EEC mark |
|---|---|
| Regulation Type | Order |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 24.07.2001 |
|---|---|
| Effective from | 21.04.2004 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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