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Фрагмент инструкции
TELEPHONE : + 44 (0) 1684 891500 FACS IMILE: + 44 (0) 1684 891600 EMA IL: sa les@ e lectron icdev ice.demon.co.uk WEB S ITE: lectron icdev ice.demon.co.uk IMPORTANT 1. The equipment supplied must not be modified in any way since modifications will invalidate intrinsic safety certification, MCA and Lloyds approval. 2. Care should be taken during servicing as high voltages may be present on the output contacts. 3. It is important to note that the ED810 contains four Zener Barriers, type ZB1, which are “potted” in epoxy resin. The Zener Barriers contain fuses which once damaged are not replaceable. The fuses inside the Zener Barrier will blow if even temporary short circuits are placed on the sensor wiring thus rendering the Zener Barrier inoperable and not repairable. Great care should therefore be taken to avoid inadvertent short circuits. 4. Electronic Devices strongly recommend consultation of the HSE publication EH40, which lists the permitted levels of exposure to most toxic gases. ATEX ESSENTIAL SAFETY REQUIREMENTS The ED810 gas detector, internally mounted Zener Barriers and associated gas sensors are ATEX certified Intrinsically Safe and the following important requirements need to be followed. 1. The equipment must only be installed, operated and maintained by trained competent personnel. 2. This apparatus has been designed in accordance with EN50 014 and EN50 020, therefore the apparatus has been designed to meet the fault tolerant requirements of Associate Apparatus for Category 'ia'. 3. The installation and maintenance must be in accordance with all appropriate international, national and local standard codes of practice and site regulations for intrinsically safe apparatus. 4. The installation and maintenance must be in accordance with the instructions contained in this installation and maintenance manual. 5. Access to the circuitry must not be made during operation. 6. This product is an associated electrical apparatus and must not be installed in the hazardous area without the provision of further certified hazardous area protection. 7. The product must not be subjected to mechanical and thermal stresses in excess of those permitted in the certification documentation and the instruction manual. If necessary the product must be protected by an enclosure to prevent mechanical damage. 8. The product must not be installed in a position where it may be attacked by aggressive substances. 9. The product must be protected from excessive dust by an enclosure etc. 10. The product can not be repaired by the user and must be replaced by an equivalent certified product. Repairs should only be carried out by the manufacturer or approved service centre. ED810 INSTRUCTION MANUAL 24-06-11 MARKING All units have a rating label which carries the following important information: Model type: GAS DETECTOR TYPE ED810 Input voltage: 12Vdc/24Vdc (delete as appropriate) Vmax in; Um: 250V Code: [EEx ia] II C Certificate no. Baseefa03ATEX0507/1 Epsilon x, gas group II(1) G and category: CE marking, Notified body 1180 number: Serial no. (serial number must be entered here) Year of construction: (year of manufacture must be entered here) GENERAL The ED810 is a fixed installation gas detection system which can detect a wide range of flammable and toxic gases dependent upon sensor type used. The ED810 is designed for use in 12V or 24V DC insulated and earthed return electrical systems. For insulated return systems special consideration should be given to the “Hazardous Area common connection” terminal. This should normally be connected to a good quality earth suitable for intrinsically safe equipment. However this terminal is internally connected to 0V (-VE) of the DC supply and on insulated return installations may produce an earth fault. Isolation can be provided by using a DC-DC inverter, or if mains is available, a suitable linear power supply unit. Both are available from EDL. Attention is drawn to the need for correct cabling, particularly to the sensors located in the Hazardous Area. The cable supplied by EDL for use with the ED810 has been tested to ensure correct parameters, see installation section of this manual. Attention is also drawn to the need for calibration soon after installation. When supplied alarm levels are approximately set for the target gas (if stated with order) so that a measure of immediate protection is obtained once correct operation has been ensured. ED810 INSTRUCTION MANUAL 24-06-11 INSTALLATION Note only EDL manufactured sensors, which are suitably certified can be connected to the ED810 and fitted in the Hazardous Area. The ED810 control unit and all uncertified equipment should be located in the Safe Area only. Control Unit: The unit should be mounted in a convenient position for the operator away from possible mechanical damage or ingress of moisture and allowing the clear hinged lid to swing open for ease of calibration etc. Remove the front cover by unscrewing the thumb screws and ...