23/2003 Coll. GOVERNMENT REGULATION of 9 December 2002 laying down technical requirements for equipment and protective systems intended for use in potentially explosive atmospheres Government directs pursuant to § 22 of Act no. 22/1997 Coll., On technical requirements for products and Amendments some laws as amended by Act no. 71/2000 Coll. and Act no. 205/2002 Coll., (hereinafter the "Act") to implement § 11 para. 2, § 11 paragraph. 2 point. c) § 12 para. 1 and 3 and § 13 para. 2 of the Act: § 1 General Provisions (1) This regulation is in accordance with European Community law ^ 1) sets out the technical requirements a) equipment and protective systems intended for use in potentially explosive atmospheres, b) safety and control devices intended for use outside potentially explosive atmospheres but required for or contributing to the safe functioning of equipment and protective systems in terms of the risk of explosion. (2) For the purposes of this Regulation, a) facilities are considered machines, apparatus, fixed or mobile devices, control components and instrumentation thereof and detection or prevention systems which, separately or in conjunction intended for the generation, transmission, storage, measurement control and conversion of energy or the processing of material and which are capable of causing an explosion through their own potential sources of ignition, b) protection systems consider means other than system components defined in point a), which are designed for explosion suppression in the initial stage or limit the effects of an explosion and which are marketed separately for use as autonomous systems, c) components considered important elements needed for safe operation of equipment and protective systems but with no autonomous function d) an explosive atmosphere is considered a mixture of air and flammable substances in the form of gases , vapors, mists or dusts under atmospheric conditions in which, after ignition, combustion spreads to the entire unburned mixture, e) explosive atmospheres considers the environment in which they can an explosive atmosphere due to local and operational conditions, f) groups and categories Equipment groups and categories are considered representative of the intended use of the device and the desired level of protection, the criteria for inclusion into equipment groups and categories are listed in Annex no. 1 hereto. Equipment and protective systems may be designed for a particular explosive atmosphere; in this case must be marked accordingly, g) the intended use is considered use of the equipment, protective systems and devices referred to in paragraph 1. b) that corresponds to their inclusion in the appropriate equipment group and category, which is consistent with all of the information provided by the manufacturer needed for safe operation of equipment and protective systems and devices. (3) This Regulation shall not apply to: a) medical devices intended for use in a medical environment, b) equipment and protective systems intended for use only in potentially explosive atmospheres explosives or chemically unstable substances c) equipment intended for use in homes and for outside business where can an explosive atmosphere occur only rarely, only as a result of the accidental leakage of fuel gas, d) personal protective equipment, which are set to conformity assessment special legislation ^ 2) e) seagoing vessels and mobile floating units together with their equipment, f) vehicles intended solely for transporting passengers by air, road or rail systems or water, as well as vehicles that are designed for transporting baggage, goods and live animals by air, on public road or rail systems (outside lanes mining, industrial and portable) or water, except for vehicles intended for use in potentially explosive atmospheres, g) equipment for the production of weapons, ammunition and military equipment. (4) specified products under this regulation within the meaning of § 12 para. 1 point. a) of the Act are those devices, protective systems and components intended for use in potentially explosive atmospheres, and instruments referred to in paragraph 1. b) other than those listed in paragraph 3. Set products are classified into Groups I and II and M1, M2, 1, 2 and 3 according to the criteria specified in Annex no. 1 hereto. § 2 Conditions for placing on the market and putting into service (1) Equipment, protective systems and devices referred to in § 1 para. 1 point. b) may be placed on the market or put into service only if, when properly installed, maintained and used for their intended purpose not endanger the health and safety of persons or also domestic animals or property. (2) The technical requirements for equipment, protective systems and devices referred to in § 1 para. 1 point. b) providing for the basic safety and health requirements for the design and construction of equipment and protective systems and devices referred to in § 1 para. 1 point. b) (hereinafter referred to as "essential requirements") are listed in Annex no. 2 to this Order. Equipment, protective systems and devices referred to in § 1 para. 1 point. b) must meet the essential requirements that apply to them with regard to their intended use. (3) If one or more essential concretized harmonized Czech technical standards or foreign technical standards adopting the Member States of the European Union harmonized European standards (§ 4 Act), and equipment, protective system or device referred to in § 1 para. 1 point. b) or component designed for installation into equipment or protective system has been designed according to these standards, it is considered that they are in conformity with the relevant essential requirements. (4) Any equipment, protective system or device referred to in § 1 para. 1 point. b) that meet all the requirements of this Regulation shall be the manufacturer or his authorized representative, before placing on the market of CE marked and equipped with enclosed EC declaration of conformity. (5) Each component designed for installation into equipment or protective system must be manufacturer or his authorized representative, before placing on the market of a written attestation according to § 3 par. 3. (6) Equipment, protective systems and devices referred to in § 1 para. 1 point. b) which do not comply with this Regulation may be shown or exhibited at fairs, exhibitions or demonstrations only if visible sign explicitly draws attention to this fact and the fact that they are not for sale until the manufacturer or his authorized representative brought into line with this Regulation. During their demonstration must be taken adequate security measures to ensure the protection of persons. § 3 Conformity assessment procedures (1) For the equipment and instruments specified in § 1 para. 1 point. b) the assessment of conformity carried out by the following procedures: a) for facilities belonging to the group I category M1 or Group II Category 1 manufacturer or his authorized representative shall ensure that the EC type examination in accordance with Annex no. 3 hereto and by their choice to ensure either the production quality assurance procedures in accordance with Annex no. 4 hereto, or the product verification procedure described in Annex no. 5 to this Regulation, b) for combustion engines and electrical equipment belonging to the group I category M2 and Group II, Category 2 manufacturer or his authorized representative shall ensure that the EC type examination in accordance with Annex no. 3 hereto and at its option, provide either procedure type conformity in accordance with Annex no. 6 to this Regulation or the product quality assurance procedures pursuant to Annex no. 7 to this Regulation, c ) for facilities belonging to the Group I category M2 and Group II, Category 2 other than those referred to in point b) the manufacturer or his authorized representative shall ensure that internal control procedures of production pursuant to Annex no. 8 hereto, and transmit technical product documentation (point 3 of Annex no. 8 hereto) Notified Body, 3) to acknowledge receipt and archive it, d) for facilities belonging to the group II category 3 manufacturer or his authorized representative shall ensure that internal control procedures of production pursuant to Annex no. 8 hereto, e) u Equipment belonging to Group I or Group II, the manufacturer or his authorized representative instead of the procedures referred to in paragraph 1. a), b), c) and d) the verification procedure to select the various products listed in Annex no. 9 hereto. (2) In the case of autonomous protective systems manufacturer or its authorized representative ensures conformity assessment procedure referred to in paragraph 1. a) or the procedure referred to in paragraph 1. E). (3) For the components for incorporation into equipment or protective system manufacturer or its authorized representative ensures conformity assessment in the manner specified in paragraph 1, except as part of the name CE. The manufacturer or his authorized representative shall issue a written certificate, which confirms the compliance of the components with the relevant provisions of this Regulation and indicate the characteristics of the components and how they must be built to meet the basic requirements applicable to the equipment or protective system. (4) The safety factors listed in Section 1.2.7 of Annex no. 2 to this Order may be assessed by consensus by the manufacturer or his authorized representative procedure for internal control of production pursuant to Annex no. 8 hereto. (5) The documents and correspondence relating to conformity assessment procedures under the above provisions shall be taken in one of the languages ​​of the EU Member States in which these procedures are being applied or in a language accepted by the notified person. (6) The EC declaration of conformity must contain a) identification data of the manufacturer or his authorized representative (for individuals name and surname and residence or place of business, for legal entities name or business name and its headquarters), b) identification of a person authorized to act on behalf of the manufacturer or authorized representative, c) description of the equipment, protective system or device referred to in § 1 para. 1 point. b) d) references to the relevant laws and provisions that equipment, protective system or device referred to in § 1 para. 1 point. b) satisfies, e) identification of the Notified Body (number, name or company name and its registered office) if they participated in conformity assessment and number of EC type examination certificate, if issued, f) reference to technical standards in accordance with § 2. 3, if used, g) technical standards and technical specifications, if used, h) references to the relevant provisions of the European Communities, if used. (7) Evidence of conformity assessment (§ 13 para. 7 of the Act) include a copy of the EC declaration of conformity and documents depending on the progress of compliance are set out in the relevant provisions of Annexes to the Regulation. § 4 CE marking and other labeling (1) CE, the graphic form by special legislation, ^ 4) is mounted directly on equipment, protective system or device referred to in § 1 para. 1 point. b) so that it is clear, visible, legible and indelible. For small equipment, protective systems or devices referred to in § 1 para. 1 point. b) can be the size of the CE marking is less than 5 mm. Equipment, protective system or device referred to in § 1 para. 1 point. b) shall not bear that anyone could mislead regarding CE marking. On the product can be placed and sign other than CE, but it must not be reduced visibility or legibility of the CE. (2) The CE marking must be followed by the identification number of the notified person who participates conformity assessment in the production phase. (3) The CE mark on the equipment, protective system or device referred to in § 1 para. 1 point. b) indicates that the product meets the technical requirements laid down all laws that apply to them and that this designation prescribe or allow, and that was during the conformity assessment complied with the stipulated procedure. However, if one or several pieces of legislation during the transitional period allows the manufacturer to choose which provisions to apply, the CE marking indicates conformity only with those laws or provisions applied by the manufacturer. In this case, the documentation, notices or instructions required by the legislation and accompanying such products, provide information on the respective legislation of the European Community or their provisions applied by the manufacturer. § 5 Notification of the imposition of safeguard measures in the event that it was for equipment, protective system or device referred to in § 1 para. 1 point. b) ordered protective measures under a special law, ^ 5) brings in the announcement of the decision on imposition of safeguard measures under § 7 para. 8 of the Act, whether the disagreement was caused by a) failure to meet the essential requirements pursuant to § 2 para. 2, or b) incorrect using technical standards referred to in § 2 para. 3, or c) shortcomings in the technical standards set forth in § 2. 3. § 6 Conditions of Authorization (1) With the authorization of legal persons under § 11 par. 2 of the Act the conditions laid down in Annex no. 10 hereto. Legal entities that meet the criteria laid down in the relevant harmonized technical standards shall be presumed to comply with the conditions. (2) An authorized person with the procedure referred to § 11 para. 7 of the Act becomes a Notified Body. Transitional and Final Provisions § 7 (1) Valid certificates or other documents issued pursuant to Government Decree no. 176/1997 Coll., As amended by Government Regulation no. 286/2000 Coll., May be used for purposes of conformity assessment pursuant to this Regulation, if not canceled as specified by law. (2) Persons authorized to perform activities in conformity assessment pursuant to Government Decree no. 176/1997 Coll., As amended by Government Regulation no. 286/2000 Coll., Shall be deemed to be authorized to carry out activities under this Regulation. § 8 shall be repealed: 1. Decree no. 176/1997 Coll., Laying down technical requirements for equipment and protective systems intended for use in potentially explosive atmospheres. 2. Government Order no. 286/2000 Coll., Amending Government Regulation no. 176/1997 Coll., Laying down technical requirements for equipment and protective systems intended for use in potentially explosive atmospheres. § 9 This regulation comes into effect on the Treaty of Accession of the Czech Republic to the European Union. Prime Minister: Dr.. Špidla, Minister of Industry and Trade Ing. Rusnok vr Příl.1 CRITERIA FOR CLASSIFICATION OF EQUIPMENT INTO GROUPS AND CATEGORIES 1. Equipment-group I a) Category M 1 comprises equipment that is constructed and, where necessary, equipped with additional special means of protection to be capable of functioning in conformity with operating parameters established by the manufacturer and ensuring a very high level of protection. Equipment in this category is intended for use in underground parts of mines endangered by methane or combustible dust, and in those parts of surface equipment such mines endangered by methane or combustible dust. After the devices in this category is required to remain functional, even in the event of rare incidents relating to equipment in the presence of explosive atmospheres, and that was marked by the means of protection against explosion that aa) either in the event of failure of one means used protection ensures an adequate level Security at least one other independent means of protection, or b) in the event of two faults occurring independently of each other, a sufficient level of safety. Equipment in this category must comply with additional requirements set out in Section 2.0.1 of the Annex no. 2 to this Order. b) Category M 2 comprises equipment that is designed to be capable of functioning in conformity with the operating parameters established by the manufacturer and ensuring a high level of protection. Equipment in this category is intended for use in underground parts of mines with a probable danger of methane or flammable dust and in those parts of surface equipment such mines where there is danger of methane or flammable dust likely. This device is expected to be in the event of an explosive atmosphere off. Protective Equipment in this category must ensure an adequate level of protection during normal operation and also in the case of more severe operating conditions arising in particular rough treatment and changing environmental conditions. Equipment in this category must comply with additional requirements set out in Section 2.0.2 of the Annex no. 2 to this Order. 2. A group of equipment II a) Category 1 comprises equipment that is designed to be capable of functioning in conformity with the operating parameters established by the manufacturer and ensuring a very high level of protection. Equipment in this category is intended for use in areas where an explosive atmosphere is a mixture of air and gases, vapors or mists or dust mixtures are present continuously, for long periods or frequently. Equipment in this category must ensure an adequate level of protection in the event of rare incidents relating to equipment, and is characterized by such means of protection against explosion that aa) either in the event of failure of one means used protection ensures the required level of safety of at least one other independent means of protection; b) in the event of two independent faults, ensure the required level of safety. Equipment in this category must comply with additional requirements set out in paragraph 2.1 of Annex no. 2 to this Order. b) Category 2 comprises equipment that is designed to be capable of functioning in conformity with the operating parameters established by the manufacturer and ensuring a high level of protection. Equipment in this category is intended for use in areas where the occasional explosive atmosphere consisting of a mixture of air and gases, vapors or mists or dust mixtures are likely to occur. Protective devices in this category ensure an adequate level of protection in the event of frequent disturbances or frequent equipment failures, with which it must normally allow. Equipment in this category must comply with additional requirements set out in section 2.2 of Annex no. 2 to this Order. c) Category 3 comprises equipment that is designed to be capable of functioning in conformity with the operating parameters established by the manufacturer and ensuring a normal level of protection. Equipment in this category is intended for use in areas where an explosive atmosphere consisting of a mixture of air and gases, vapors or mists or dust mixtures are not likely, and if the explosive atmosphere arises, will be present only rarely and only for short periods. Construction equipment in this category must ensure the requisite level of protection during normal operation. Equipment in this category must comply with additional requirements set out in paragraph 2.3 of Annex no. 2 to this Order. Annex No. 2 BASIC SAFETY AND HEALTH REQUIREMENTS FOR DESIGN AND CONSTRUCTION OF EQUIPMENT AND PROTECTIVE SYSTEMS INTENDED FOR USE IN HAZARDOUS Introductory remarks A. The technical knowledge which can change very rapidly, must be taken into account as quickly as possible and immediately used. B. For the devices mentioned in § 1 para. 1 point. b) the basic requirements only to the extent that is necessary for the safe and reliable functioning and operation of those devices in terms of the risk of explosion. 1. COMMON REQUIREMENTS FOR EQUIPMENT AND PROTECTIVE SYSTEMS 1.0 General Requirements 1.0.1 Principles of integrated explosion safety Equipment and protective systems intended for use in potentially explosive atmospheres must be designed from the point of view of integrated explosion safety. To do this, the manufacturer must take the following measures a) first of all, if possible, to prevent the formation of explosive atmospheres which may be produced or released by the device itself or protection system, b) prevent ignition of explosive atmospheres, taking into account characteristics of every electrical and non-electrical source of ignition, c) where it is still likely emergence of an explosion, which could directly or indirectly endanger persons and, possibly also domestic and farm animals, or property to ensure the immediate suppression of explosion or contain the effects of an explosion of flames and explosion pressures to a sufficient level of safety. 1.0.2 Equipment and protective systems must be after due analysis of possible operating faults designed and manufactured in order to avoid the most dangerous situations. Consideration must be taken as any reasonably foreseeable misuse. 1.0.3 Special checking and maintenance conditions Equipment and protective systems subject to special checking and maintenance conditions must be designed and constructed with such conditions in mind. 1.0.4 Environmental conditions Equipment and protective systems must be designed and constructed so as to be capable of coping with actual and foreseeable environmental conditions. 1.0.5 Marking All equipment and protective systems must be legibly and durably marked with at least the following information) Name and address of the manufacturer (for natural persons name and last name and place of residence or place of business, for legal entities name or business name and domicile) b) the CE marking, c) designation of series or type, d) serial number, if any, e) the year of manufacture, f) specific marking of explosion protection (see fig.), accompanied by the symbol equipment group and category, g) for group II, the letter 'G' (concerning explosive atmospheres consisting of a mixture of air and gases, vapors or mists), or the letter "D" (for the explosive atmosphere in the form of dust mixtures). Further, if necessary, they should also be marked with all information essential to their safe use. 1.0.6 Instructions for use a) For each equipment and protective systems must be supplied instruction manual, which includes at least the following aa) repeat the information with which the equipment or protective system marked, except the serial number (see section 1.0.5), together with any appropriate additional information to facilitate maintenance (eg addresses of the importer, repair organization), and b) instructions for safe: putting into service, use, assembly and disassembly, maintenance ( preventative maintenance and repair), installation, adjustment, and c) where necessary, the definition of the endangered area before the device for pressure release, and d) where necessary, training instructions, e) details which allow without any doubt to decide whether the equipment specified category or a protective system can be used safely in the intended area under the expected operating conditions, and f) electrical and pressure parameters, maximum surface temperatures and other limit values; and g) where necessary, special conditions of use, including details of inappropriate use to which the experience gained may occur h) where necessary, the essential characteristics of tools which are for the equipment or protective system is appropriate. b) Instructions for use should be the manufacturer or his authorized representative written in one of the languages ​​of the European Community. When commissioning must be all equipment and protective systems equipped with the instruction manual translation into the language or languages ​​of the country in which they are the equipment and protective systems used, and initial instruction in one of the languages ​​of the European Community. This translation by the manufacturer or his authorized representative or the person who places the equipment and protective systems into the language area. However, the maintenance instructions intended for use by specialists employed by the manufacturer or his authorized representative may be one of the languages ​​of the European Community, which the specialized personnel understand. c) The user manual must contain the drawings and diagrams necessary for putting into service, maintenance, inspection, checking of correct operation and, where appropriate, repair of the equipment or protective system, together with all useful instructions in particular in terms of safety. d) No commercial or other literature accompanying the equipment or protective system describing specific equipment or protective system must not contradict the instructions describing safety aspects. 1.1 Selection of materials 1.1.1 Materials used for the construction of equipment and protective systems must not contemplated at the operational stress cause an explosion. 1.1.2 The range of operating conditions established by the manufacturer may develop reactions between the materials used and the constituents of the potentially explosive atmosphere which could impair explosion protection. 1.1.3 Materials must be so selected that predictable changes in their characteristics and their compatibility with other materials will not lead to a reduction in the protection afforded; attention must be paid specifically to the material's corrosion and wear resistance, electrical conductivity, mechanical strength, aging resistance and the effects of temperature variations. 1.2 Design and construction 1.2.1 Equipment and protective systems must be designed and constructed with respect to the technical knowledge of explosion protection so that they can be safely operated throughout their expected lifetime. 1.2.2 parts intended to be placed or for use as replacement parts in equipment and protective systems must be designed and constructed so safely for their intended function of explosion protection when they are installed according to the manufacturer's instructions. 1.2.3 Enclosed structures and prevention of leaks Equipment of which may release flammable gases or dusts must, if possible, use only enclosed structures. If the device openings or non-tight joints, must be as far as possible in such a way that escaping gases or dusts can not create an explosive atmosphere outside the equipment. The place in which the material is fed or from which it is taken, it must be done as far as possible and equipped so that during filling or draining limit escapes of flammable materials. 1.2.4 Dust deposits Equipment and protective systems intended for use in dusty environments must be designed so that dust deposited on their surfaces is not ignited. Generally it should be, whenever possible, be limited by deposition of dust. Equipment and protective systems must be easily cleanable. The surface temperature of equipment parts must be kept well below the glow temperature of the deposit dust. Consideration must be taken thickness of dust deposits, and if necessary, measures must be taken to limit the temperature in order to avoid heating. 1.2.5 Additional means of protection Equipment and protective systems which may be exposed to certain types of external stresses must be equipped, if necessary, additional means of protection. Equipment must withstand relevant stresses, without adverse effect on explosion protection. 1.2.6 Safe opening If equipment and protective systems installed in housing or in a closed cabinet forming part of the explosion protection itself, it must be possible to open such housing or housing that only special tool or for appropriate protective measures. 1.2.7 Protection against other hazards Equipment and protective systems must be designed and constructed so that: a) avoid injury or other harm that could occur due to direct or indirect contact, b) ensure that accessible parts does not arise Surface temperature or radiation, which could cause danger, c) eliminate non-electrical dangers which by experience, d) ensure that the predictable overload conditions will not occur in a dangerous situation. If the risk of equipment and protective systems referred to in this paragraph entirely or partly covered by other government regulations issued to implement the Act, then for these risks apply to such other government regulations. 1.2.8 Overloading of equipment Dangerous overloading must be prevented already at the design stage by involving measurement, regulation and control devices, such as overcurrent protection, temperature limiters, differential pressure switches, flowmeters, timers, watchdog speed limit, and similar types of monitoring devices. 1.2.9 Systems flameproof If parts which can ignite an explosive atmosphere are located in the end, must be implemented measures that will ensure that the conclusion can withstand the pressure generated by the explosion of explosive mixtures inside the enclosure and prevents the transmission of the explosion to the explosive atmosphere surrounding conclusion. 1.3 Potential ignition sources 1.3.1 Hazards arising from different ignition sources Potential ignition sources such as sparks, flames, electric arcs, high surface temperatures, acoustic energy, optical radiation, electromagnetic waves and other ignition sources must be excluded. 1.3.2 Danger caused by static electricity build up of electrostatic charges capable of resulting in dangerous discharges must be prevented by appropriate means. 1.3.3 Danger caused by stray electrical currents and leakage must be prevented dispersion and leakage currents in conductive parts, which could result, for example, the occurrence of dangerous corrosion, overheating of surfaces or sparks, as a result of which could lead to initiation. 1.3.4 Danger from overheating Already during construction, if possible, be prevented from overheating caused by friction or shock, for example, between materials and parts abutting each other during rotation or due to intrusion of foreign bodies. 1.3.5 Danger from equalizing pressure equipment and protective systems must be designed or fitted with integrated measuring, control and regulating apparatus so that when pressure equalization as a result of their actions or avoid the formation of a shock wave compression, which could cause ignition. 1.4 Hazards caused by external effects 1.4.1 Equipment and protective systems must be designed and constructed so as to be able to perform the function for which they were conceived, safely and under varying environmental conditions, in the presence of external voltage, humidity, vibration, pollution response and other external effects, considering the range of operating conditions specified by the manufacturer. 1.4.2 Equipment parts used must be appropriate to the intended mechanical and thermal stresses and must be capable of withstanding the effects of existing or foreseeable aggressive substances. 1.5 Requirements for safety devices 1.5.1 Safety devices must function independently of any measurement or control devices required for operation. If possible, it must be a safety device failure is detected by appropriate technical means sufficiently rapidly to ensure that there is only very little likelihood that dangerous situations. Generally, to be applied the principle put into a safe state in the event of a fault. Putting into safe state must always be done by direct action on the control devices, it is without a software command. 1.5.2 In the event of a failure of a safety device must be equipment or protective system, wherever possible, put into a safe state. 1.5.3 Emergency shutdown of safety devices must, if possible, fitted with lock against restarting. A new command to begin normal operation can be given only after a deliberate shutdown lockout reclosing. 1.5.4 Controls and display units When used controls and display unit must be carried out in accordance with ergonomic principles in order to achieve the highest possible level of operating safety with regard to the risk of explosion. 1.5.5 Requirements for devices with a measuring function for explosion protection devices with a measuring function, which affect equipment used in explosive atmospheres must be designed and constructed to handle all foreseeable operating requirements and special conditions of use. 1.5.6 If necessary, it must be possible to check the reading accuracy and serviceability of devices with a measuring function. 1.5.7 Design of devices with a measuring function must reckon with a safety factor which ensures that the warning threshold lay far enough outside the explosion limits flammability or explosive atmosphere in the device registers, in particular with regard to the operating conditions of the installation and the possibility of deviation measurement system. 1.5.8 Danger caused by software when designing equipment, protective system, and also by safety devices, software-controlled, must be given special attention to analyzing the risks arising from faults in the program. 1.6 Safety requirements for systems 1.6.1 to shut down the equipment and protective systems incorporated within automatic processes must deviate from the expected operating conditions unless it is at the expense of safety, given the possibility of taking over manual control. 1.6.2 When put into action emergency shutdown system must be accumulated energy as quickly and as safely reduced or isolated so that it no longer poses a risk. This requirement does not apply to electrochemical power sources. 1.6.3 Danger caused by power failure equipment and protective systems can give a power failure result in further danger must be secured so that it is possible to maintain the safe state of operation independently of the rest of the installation. 1.6.4 Danger from connections Equipment and protective systems must be fitted with suitable inputs for cable and conduit. When equipment and protective systems intended for use in combination with other equipment and protective systems must link them safe. 1.6.5 Placing of warning devices as parts of equipment Where equipment or protective systems are fitted with devices for detection or alarm devices for monitoring the presence of an explosive atmosphere must be equipped with the necessary instructions to allow their placement in the right place. 2. SUPPLEMENTARY REQUIREMENTS FOR EQUIPMENT 2.0 Requirements for category M of equipment-group I 2.0.1 Requirements for category M 1 of equipment-group I 2.0.1.1 Equipment must be designed and constructed so that ignition sources become active, even in event of rare incidents relating to the device. Equipment must be equipped with means of protection such that: a) in the event of failure of one means of protection secured at least one other independent means of protection required level of safety, or b) a sufficient level of safety has been ensured in the event of two faults occurring independently of each other. If necessary, this equipment must be equipped with additional special means of protection. It must remain functional even in the presence of explosive atmospheres. 2.0.1.2 The device must be, if necessary, carried out so as to penetrate into the interior thereof, no dust. 2.0.1.3 In order to prevent the ignition of suspended dust, the surface temperature must be part of the facilities kept well below the ignition temperature of the foreseeable dust mixtures. 2.0.1.4 Equipment must be so designed that the opening of equipment parts which might be sources of ignition could be performed only at standstill or intrinsically safe conditions. Where it is not possible to put the device into standby mode, where the manufacturer must be placed at the opening part of the equipment warning label. If necessary, equipment must be fitted with appropriate additional interlocking systems. 2.0.2 Requirements for category M 2 of equipment-group I 2.0.2.1 Equipment must be equipped with means of protection ensuring that sources of ignition could not become active during normal operation, even under adverse operating conditions, particularly when those arising from rough handling and changing environmental conditions. The device is intended to be in the presence of an explosive atmosphere off. 2.0.2.2 Equipment must be so designed that the opening of equipment parts which may be sources of ignition, was possible only in the idle state or via a suitable locking mechanisms. Where it is not possible to put the device into standby mode, where the manufacturer must be placed at the opening part device warning label. 2.0.2.3 must be applied requirements concerning the risk of explosion dust mixtures to category M 1 of equipment I. 2.1 Requirements for Category 1 equipment group II 2.1.1 Explosive atmospheres formed by mixtures of air and gases, vapors or mists 2.1.1.1 Equipment They must be so designed and constructed that sources of ignition could not become active, even in event of rare incidents relating to equipment. Equipment must be equipped with means of protection such that: a) in the event of failure of one means of protection secured at least one other independent means requisite level of protection, or b) the required level of protection was ensured in the event of two faults occurring independently of each other. 2.1.1.2 For equipment with surfaces which may heat up, must be taken measures to ensure that the stated maximum surface temperatures are not exceeded even in the most dire circumstances. In this context must be taken into account warming caused by heating and chemical reactions. 2.1.1.3 Equipment must be so designed that the opening of equipment parts which may be sources of ignition have been possible only in the idle state or intrinsically safe conditions. Where it is not possible to put the device into standby mode, where the manufacturer must be placed at the opening part device warning label. If necessary, the equipment must be fitted with appropriate additional interlocking systems. 2.1.2 Explosive atmospheres formed dust mixtures 2.1.2.1 Equipment must be designed and constructed so as not to initiate dust mixtures are present even in the event of rare incidents relating to equipment. Equipment must be equipped with means of protection such that: a) in the event of failure of one means of protection secured at least one other independent means requisite level of protection, or b) the required level of protection was ensured in the event of two faults occurring independently of each other. 2.1.2.2 If necessary, equipment must be so designed that dust can enter the device or escape from only specifically to the proposed locations. This requirement must also meet the cable entries and connecting pieces. 2.1.2.3 In order to prevent the ignition of suspended dust, must be maintained surface temperatures of equipment parts, well below the ignition temperature of the foreseeable dust mixtures. 2.1.2.4 the safe opening of equipment parts, the requirements specified in 2.1.1.3. 2.2 Requirements for category 2 of equipment-group II 2.2.1 Explosive atmospheres formed by mixtures of air and gases, vapors or mists 2.2.1.1 Equipment must be designed and constructed to prevent ignition sources, even in the event of frequent disturbances or equipment operating faults with which must normally allow. 2.2.1.2 Equipment parts must be so designed and constructed that their stated surface temperatures are not exceeded, even in the case of danger arising from abnormal situations anticipated by the manufacturer. 2.2.1.3 The device shall be so designed that the opening of equipment parts which could be a source of ignition was only possible in the idle state or via suitable locking systems. Where it is not possible Equipment put into standby mode, where the manufacturer must be placed at the opening part device warning label. 2.2.2 Explosive atmospheres formed dust mixtures 2.2.2.1 Equipment must be designed and constructed so as not to initiate dust mixtures are present even in the event of frequent disturbances or frequent equipment operating faults, which are normally to be expected. 2.2.2.2 The surface temperatures, requirement 2.1.2.3. 2.2.2.3 With regard to protection against dust, requirement 2.1.2.2. 2.2.2.4 the safe opening of equipment parts, requirement 2.2.1.3. 2.3 Requirements for Category 3 equipment group II 2.3.1 Explosive atmospheres formed by mixtures of air and gases, vapors or mists 2.3.1.1 Equipment must be designed and constructed so as to prevent foreseeable ignition sources which can occur during normal operation. 2.3.1.2 When the intended operating conditions, the surface temperature must not exceed the stated maximum surface temperature. Higher temperatures may be permitted in exceptional cases only, provided that the manufacturer uses special additional protective measures. 2.3.2 Explosive atmospheres formed dust mixtures 2.3.2.1 Equipment must be designed and constructed so as to avoid the initiation dust mixtures ignition sources, the occurrence of which is likely under normal operating conditions. 2.3.2.2 The surface temperature of the requirements specified in 2.1.2.3. 2.3.2.3 Equipment, including cable entries and connecting pieces, must be so designed that the dust with regard to the size of its particles inside the devices could create explosive mixtures with air nor could dangerously accumulate inside the device. 3. SUPPLEMENTARY REQUIREMENTS IN RESPECT OF PROTECTIVE SYSTEMS 3.0 General requirements 3.0.1 Protective systems must be designed to reduce the effects of an explosion to a sufficient level of safety. 3.0.2 Protective systems must be designed, and allow those locations to prevent explosions deployment through dangerous chain reactions or flashover and that the blast from the initial stage does not enter detonation. 3.0.3 In the event of a power failure, protective systems must retain their function for a period sufficient to avoid a dangerous situation. 3.0.4 Protective systems may not work correctly due to outside interference. 3.1 Planning and design of materials 3.1.1 Properties When designing with respect to the material properties for maximum pressure and temperature takes into account the expected explosion pressure generated during extreme operating conditions and the anticipated heating effect of the flame. 3.1.2 Protection system designed to withstand explosions or bursts intercepted, must be able to withstand the expected pressure wave without loss of system integrity. 3.1.3 Accessories connected to protective systems must be capable of withstanding the expected maximum explosion pressure without losing their capacity to function. 3.1.4 When planning and design of protective systems must be taken into account reactions caused by pressure in peripheral equipment and connected pipe. 3.1.5 pressure relief systems If it is likely that stresses on protective systems will exceed their structural strength, provision must be applied in the design of appropriate means of pressure release, which do not endanger persons in the vicinity. 3.1.6 Explosion suppression systems Explosion suppression systems must be planned and designed to ensure that in the event of an incident will respond to an explosion occurring in the earliest possible stage, and to most effectively counteract explosion in terms of the maximum rate of pressure increase and the maximum explosion pressure. 3.1.7 Systems for separating blast systems for separating explosion intended to quickly separate the specified device in the initial stage of an explosion by means of appropriate devices must be designed and tailored to the operating conditions remained resistant transferring internal explosion and retained its mechanical strength. 3.1.8 Protective systems must be connected to a circuit with a suitable alarm limits so that, if necessary, interrupted feed and output and shutdown of equipment parts which can no longer function safely. Příl.3 EC TYPE-EXAMINATION 1. EC type-examination is the procedure whereby a notified body verifies and tests whether a product sample representative of the production planned satisfies the relevant provisions of this Regulation. 2. The application for EC type-examination submitted by the manufacturer or his authorized representative with a notified body of their choice. The application must include a) the identity of the producer, and if the application is lodged by the authorized representative, also information about him (for natural persons name and last name and place of residence or place of business, for legal entities name or business name and its headquarters), b) written declaration that the same application has not been lodged with any other notified body, c) the technical documentation described in section 3. The applicant must give the notified body a sample representative of the product under consideration production (hereinafter the "type"). If required by the test program, a Notified Body may request further samples. 3. The technical documentation must allow assessment of the product with the requirements of this Regulation. Must to the extent necessary for such assessment cover the design, manufacture, and operation of the product and must be within this range include: a) a general description of the type, b) conceptual designs and manufacturing drawings and deployment of components, subassemblies, circuits, etc., c) descriptions and comments necessary for an understanding of the drawings and diagrams and the operation of the product, d) a list of technical standards in accordance with § 2 para. 3, which were fully or partially implemented, and descriptions of the solutions adopted to meet the essential requirements of this Regulation, unless used technical standards referred to in § 2. 3, e) results of design calculations, reviewing and so forth, f) test reports. 4th Notified Body 4.1 examines the technical documentation, verify that the type has been manufactured in conformity with the technical documentation, and determines the elements which have been designed in accordance with the relevant provisions of technical standards in accordance with § 2 para. 3, as well as the elements which have been designed without appropriate provisions of those technical standards in accordance with § 2 para. 3, 4.2 conduct or have conducted appropriate examinations and necessary tests to check whether, where were applied technical standards in accordance with § 2 para. 3, the solution adopted by the manufacturer meet the essential requirements 4.3 conduct or have perform appropriate examinations and necessary tests to check whether, where the manufacturer has chosen to apply the relevant technical standards, these have actually been applied, 4.4 agree with the applicant the location where they will conduct examinations and necessary tests. 5. Where the type meets the relevant provisions of this Regulation shall issue to the applicant notified body EC type examination certificate. The certificate contains the name and address of the manufacturer, conclusions of the examination and necessary data for identification of the approved type. The certificate shall be accompanied by a list of the essential parts of the technical documentation shall retain a copy of the approved body. If the notified body refuses to issue the manufacturer or his authorized representative certificate shall state that refusal detailed reasons and the procedure for opposition proceedings. 6. The applicant informs the notified body that holds the technical documentation concerning the EC type examination certificate of all modifications to the approved equipment or protective system, and if such changes may affect conformity with the essential requirements or the prescribed conditions for use of the product must be for them to get additional approval . This additional approval shall Notified Body form of an addendum to the EC type examination certificate. 7. Each notified body must communicate to the other competent notified bodies the relevant information concerning the EC-type examination certificates and additions issued and canceled. 8. Other relevant notified bodies may receive copies of the EC type examination certificates or their additions. Annexes to the certificates shall be kept so that they are available to other notified bodies. 9. The manufacturer or his authorized representative must keep with the technical documentation copies of EC type examination certificates and their additions for at least 10 years after the manufacture of the equipment or protective system. If the manufacturer is not established within the European Community, there is no authorized representative, the obligation to keep the technical documentation of the person who places the product on the market. Appendix 4 PRODUCTION QUALITY ASSURANCE 1. Production quality assurance is the procedure whereby a manufacturer who fulfills the obligations laid down in section 2 ensures and declares that the products conform to the type described in the EC type examination certificate and meet the requirements of this regulation which apply to them. The manufacturer or his authorized representative affixes the CE marking to each piece of equipment and exhibits a written declaration of conformity. CE mark, the following identification number of the notified body responsible for surveillance in accordance with paragraph 4. 2. The manufacturer shall operate an approved quality system for production, final equipment inspection and testing requirements specified in Section 3 and is subject to supervision under Section 4 of the third Quality System 3.1 application for assessment of the quality system for the products concerned, submitted by the manufacturer with a notified body of their choice. The application must include: a) all necessary information for the intended product category, b) the documentation concerning the quality system, c) the technical documentation certified type and a copy of the EC-type examination. 3.2 The quality system must ensure compliance of the product with the type described in the EC type examination certificate and with the requirements of this regulation which apply to them. All elements of quality, requirements and provisions adopted by the manufacturer must be systematically and properly documented in writing in the form of policies, procedures and instructions. Documentation concerning the quality system must permit a uniform interpretation of the quality programs, plans, manuals and records. This documentation must include an account of a) the quality objectives and the organizational structure, responsibilities and powers of the management with regard to product quality, b) production processes, quality management and techniques of quality assurance processes and systematic actions that will be used, c) verification and testing, which will be carried out before, during and after manufacture, and their frequency, d) quality records, such as inspection reports and test data, calibration data, reports on the qualifications of relevant staff, and so on, e) means that monitor the achievement of the required equipment quality and the effective functioning of the quality system. 3.3 The body shall assess the quality system to evaluate whether the system meets the requirements specified in 3.2. Compliance is expected with the requirements relating to the quality system, which is implemented by the relevant harmonized standards. In the group carried out the assessment must be at least one member with experience of assessing the production of the products. The evaluation process must include an assessment visit to the manufacturer's premises. The decision must be notified to the manufacturer. The notification must contain the conclusions of the assessment and the reasons for the decision. 3.4 The manufacturer must ensure the fulfillment of the obligations arising from the approved quality system and its maintenance so that it remains adequate and efficient. The manufacturer or his authorized representative must inform the notified body that has approved the quality system of any intended updating of the quality system. The Notified Body shall evaluate the proposed changes and decide whether the amended quality system will continue to satisfy the requirements set out in paragraph 3.2, or whether it is necessary to carry out a new assessment of the quality system. Notify its decision to the manufacturer. Announcement contains the conclusions of the examination and the reasons for the decision. 4. Monitoring under the responsibility of the notified body 4.1 The purpose of surveillance is to ensure that the manufacturer duly fulfills the obligations arising out of the approved quality system. 4.2 The manufacturer allows the notified body in order to control access to production areas, areas where the checks are carried out and testing and storage premises and provide it with all necessary information, in particular: a) the documentation concerning the quality system, b) the quality records, such as inspection reports and test data, calibration data, reports on the qualifications of relevant staff and so on. 4.3 The notified body shall conduct periodic audits to make sure that the manufacturer maintains and applies the approved quality system and provide the manufacturer with a report on the results of supervision. 4.4 In addition, the notified body may carry out unannounced visits to the manufacturer during which it could, if necessary, carry out or have carried out tests to check the correct functioning of the quality system. The notified body shall provide the manufacturer with a visit report, including reports of the tests carried out eventually. 5. The manufacturer must, for a period of 10 years from the date of manufacture of the devices a) the documentation referred to in point 3.1.b, b) updates the second paragraph of section 3.4, c) the decisions and reports from the notified body, which are listed in the last paragraph of section 3.4 in Section 4.3 and 4.4. 6. Each notified body must communicate to the other competent notified bodies relevant information regarding issued and canceled quality system approvals. Appendix 5 PRODUCT VERIFICATION 1. Verification is the procedure whereby the manufacturer or his authorized representative inspects and certifies that the equipment subject to the provisions specified in Section 3 are consistent with the type described in the EC type examination certificate and the appropriate requirements of this Regulation. 2. The manufacturer is taking all measures necessary to ensure that the manufacturing process to guarantee the conformity of the equipment with the type described in the EC type examination certificate and with the requirements of this regulation which apply to them. The manufacturer or his authorized representative must affix the CE marking and issue a declaration of conformity. 3rd Notified Body carries out appropriate examinations and tests to check the conformity of the equipment, protective system, or device referred to in § 1 para. 1 point. b) with the corresponding requirements of this regulation by examining and testing every product as specified in Section 4. The manufacturer or his authorized representative shall keep a copy of the declaration of conformity for at least 10 years after the last piece of manufacturing equipment. 4. Verification by examination and testing of each device. 4.1 All equipment must be individually examined and adequately tested according to the requirements of the relevant technical standards referred to in § 2 para. 3 or be made equivalent test equipment to verify their conformity with the type described in the EC type examination certificate and the appropriate requirements of this Regulation. 4.2 The notified body shall affix or have affixed, its identification number to each approved equipment and draw up a written certificate of performed tests of compliance. 4.3 The manufacturer or his authorized representative must be able to request the certificates of conformity issued by the notified body. Appendix 6 CONFORMITY TO TYPE 1. Conformity to type is the procedure whereby the manufacturer or its authorized representative ensures and declares that the appliance conforms to the type described in the EC type examination certificate and satisfies the relevant requirements of this Regulation. The manufacturer or his authorized representative affixes the CE mark to each appliance and issue a declaration of conformity. 2. The manufacturer shall take all necessary measures to ensure that the manufacturing process assures compliance of the manufactured equipment with the type described in the EC type examination certificate and with the appropriate requirements of this Regulation. 3. The manufacturer or his authorized representative shall keep a copy of the declaration of conformity for at least 10 years after the last piece of manufacturing equipment. If the manufacturer is not established in the territory of the European Community, nor is there an authorized representative, the obligation to keep the technical documentation person that the equipment or protective system on the market provides. For each piece of equipment must be made by the manufacturer or on his behalf, carried out product tests related to the protection aspects of the product explosion. Tests are carried out under the responsibility of the notified body chosen by the manufacturer. The manufacturer shall affix the responsibility of the notified body's identification number during the manufacturing process. Příl.7 Product quality assurance 1. Product quality assurance is the procedure whereby a manufacturer who fulfills the obligations laid down in section 2 ensures and declares that the equipment is identical to the type described in the EC type examination certificate. The manufacturer or his authorized representative affixes the CE mark to each product and issued a declaration of conformity. The CE marking is the identification number of the notified body responsible for surveillance as specified in point 4. 2. The manufacturer must operate an approved quality system for final inspection and testing equipment to the requirements specified in Section 3 and must be subject to supervision under section 4. 3. Quality system 3.1 an application for assessment of his quality system for equipment submitted by the manufacturer with a notified body of their choice. The application must include: a) all necessary information for the proposed category of products, b) the documentation concerning the quality system, c) the technical documentation certified type and a copy of the EC-type examination. 3.2 As part of the quality system must be reviewed each device and adequately tested in accordance with requirements relevant technical standards in accordance with § 2 para. 3 or be made equivalent tests to ensure compliance with the relevant requirements of this Regulation. All elements of quality, requirements and provisions adopted by the manufacturer must be systematically and properly documented in writing in the form of policies, procedures and instructions. Documentation concerning the quality system must permit a uniform interpretation of the quality programs, plans, manuals and records. Documentation must include in particular an adequate description of a) the quality objectives and the organizational structure, responsibilities and powers of the management with regard to product quality, b) checking and tests that will be carried out after manufacture, c) the means of monitoring the efficient operation of the quality system, d) quality records such as inspection reports and test data, calibration data, reports on the qualifications of relevant staff and so on. 3.3 The body shall assess the quality system and decide whether it meets the requirements set out in 3.2. Compliance is expected with the requirements relating to the quality system, which is implemented by the relevant harmonized standards. In the group carried out the assessment must be at least one member with experience of assessing the production of the products. The process must include an assessment visit to the manufacturer's premises. The decision must be notified to the manufacturer. The notification must contain the conclusions of the review and the reasons for the decision. Notified Body shall notify the manufacturer conclusions of the assessment of the quality system, including justification. 3.4 The manufacturer must ensure the fulfillment of the obligations arising from the approved quality system and its maintenance so that it remains adequate and efficient. The manufacturer or his authorized representative must inform the notified body that has approved the quality system of any intended updating of the quality system. The Notified Body shall evaluate the proposed changes and decide whether the amended quality system will continue to satisfy the requirements of paragraph 3.2, or whether it is necessary to carry out a new assessment of the quality system. Notify its decision to the manufacturer. The notification must contain the conclusions of the review and the reasons for the decision. 4. Monitoring under the responsibility of the notified body 4.1 The purpose of surveillance is to ensure that the manufacturer duly fulfills the obligations arising out of the approved quality system. 4.2 The manufacturer allows the notified body in order to control access to the premises where the checks and testing, and storage premises and provide it with all necessary information, in particular: a) the documentation concerning the quality system, b) technical documentation, c) the quality records, such as inspection reports and test data, calibration data, reports on the qualifications of relevant staff and so on. 4.3 The notified body shall conduct periodic audits to make sure that the manufacturer maintains and applies the approved quality system and provide the manufacturer reports on the results of the surveillance. 4.4 In addition, the notified body may carry out unannounced visits to the manufacturer during which it could, if necessary, carry out or have carried out tests to check the correct functioning of the quality system. The notified body shall provide the manufacturer with a visit report, including reports of the tests carried out eventually. 5. The manufacturer must, for a period of 10 years from the date of the last piece of equipment a) the documentation required under point 3.1.b, b) updates the second paragraph of section 3.4, c) the decisions and reports from the notified body, which are listed in the last paragraph of section 3.4, in Section 4.3 and 4.4. 6. Each notified body must communicate to the other competent notified bodies relevant information regarding issued and canceled quality system approvals. Příl.8 INTERNAL CONTROL OF PRODUCTION 1. Internal production control is the procedure whereby the manufacturer or his authorized representative who fulfills the obligations of Section 2 ensures and declares that the equipment complies with the relevant requirements of this Regulation. The manufacturer or his authorized representative affixes each CE marking and issued a declaration of conformity. 2. The manufacturer procures the technical documentation described in point 3 and he or his authorized representative shall keep it for at least ten years after the last piece of manufacturing equipment for inspection. If the manufacturer is not established within the European Community, there is no authorized representative, the obligation to keep documentation of the person placing the equipment on the market. 3. Technical documentation must enable the conformity of the equipment with the relevant requirements of this Regulation. Must to the extent necessary for such assessment, cover the design, manufacture and operation of the device. The documentation must include a) a general description of the device, b) conceptual design and manufacturing drawings and diagrams of components, sub-assemblies, circuits, etc., c) descriptions and comments necessary for the understanding of those drawings and diagrams and function of the device, d) a list of technical standards in full or in part, and unless used technical standards, a description of the solutions adopted to satisfy the safety aspects of this regulation, e) results of design calculations, examination etc., f) test reports. 4. The manufacturer or his authorized representative must keep with the technical documentation a copy of the declaration of conformity. 5. The manufacturer shall adopt all measures necessary to ensure that the manufacturing process to guarantee compliance of the manufactured equipment with the technical documentation referred to in section 2 and the corresponding requirements of this Regulation. Příl.9 Unit verification 1. Verification of individual products is the procedure whereby the manufacturer ensures and declares that the equipment or protective system which has been issued with the certificate referred to in point 2, complies with the corresponding requirements of this Regulation. The manufacturer or his authorized representative affixes the equipment or protective system is the CE marking and issued a declaration of conformity. 2nd body shall examine the individual equipment or protective system and carry out appropriate tests in accordance with relevant technical standards in accordance with § 2 para. 3 or equivalent tests carried out to verify compliance with the relevant requirements of this Regulation. The notified body shall affix or have affixed, its identification number on the approved equipment or protective system and draw up a certificate of conformity concerning the tests carried out. 3. The technical documentation is to enable conformity with the requirements of this Regulation and the design, manufacture and operation of the equipment or protective system. The technical documentation must include a) a general description of the product, b) conceptual designs and manufacturing drawings and drawings placement of components, subassemblies, circuits, etc., c) descriptions and explanations necessary for the understanding of the drawings and diagrams and the operation of equipment or protective system, d) List of technical standards in accordance with § 2 para. 3, applied in full or in part, and unless used technical standards in accordance with § 2 para. 3, descriptions of the solutions adopted to meet the essential requirements of this Regulation, e) results of design calculations, reviewing and so furthermore, f) test reports. Příl.10 CONDITIONS FOR AUTHORIZATION Terms authorization pursuant to § 11 para. 2 of the Act are: 1. Authorized body, its director and the staff responsible for carrying out the verification tests may not be the designers, manufacturers, suppliers and construction workers equipment and protective systems, or devices referred to in § 1. 1 point. b) control, nor the authorized representative of the parties. They may not be involved directly or as authorized representatives in the design, construction, marketing or maintenance of equipment and protective systems, or devices referred to in § 1 para. 1 point. b). This requirement does not preclude the possibility of exchange of technical information between the manufacturer and the body. 2. The body and its staff involved in authentication must carry out the verification tests with the highest degree of professionalism and competence, and must avoid all pressures and inducements, particularly financial, which might influence their judgment or the result of the inspection, especially from persons or groups persons having an interest in the results of verification. 3. The body shall have at its disposal the necessary staff and possess the necessary facilities to enable it to perform properly the administrative and technical tasks connected with verification, it must also have access to the equipment required for special verification. 4. The staff responsible for verifying must have a) sound technical and vocational training, b) sufficient knowledge of the requirements of the tests carried out and adequate experience of such tests, c) the ability to draw up certificates, records and reports required to record during the tests. 5th The authorized person is obliged to guarantee the impartiality of staff performing authentication. Their remuneration must not depend on the number of tests carried out or on the results of these tests. 6. Continuing confidentiality of employees (§ 20a of the Act) authorized persons of all facts which they learn in the activities of an authorized person under this Regulation. This does not apply to the competent state authorities. 7th authorized person shall take out liability insurance for damages (§ 11 par. 3 of the Act). 1) European Parliament and Council Directive 94/9 / EC of 23 March 1994 on the approximation of the laws of the Member States for equipment and protective systems intended for use in potentially explosive atmospheres. 2) Government Regulation no. 21/2003 Coll., Laying down technical requirements for personal protective equipment. 3) § 2. i) Law no. 22/1997 Coll., as amended by Act no. 205/2002 Coll. 4) Decree no. 291/2000 Coll., Laying down the graphic appearance of the CE mark. 5) For example, § 7, paragraph. 1 point. a) and b) of the Act no. 64/1986 Coll., the Czech Trade Inspection, as amended by Act no. 22/1997 Coll. and Act no. 205/2002 Coll.