Xgard Type 1 - Shawcity Limited

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1. Introduction English 1.1 Intrinsically safe toxic and oxygen gas detector This version of Xgard is an Intrinsically safe loop-powered (current-sink) 4-20 mA toxic or oxygen gas detector, designed to detect a wide range of gases when fitted with the appropriate electrochemical sensor. The detector is certified II 1 G Ex ia IIC T4, and is suitable for use in Zone 0, Zone 1 and Zone 2 hazardous areas when used with a suitable Zener barrier or galvanic isolator. Electrical connections to the detector are made via the terminal block on the amplifier PCB shown below. The amplifier provides power to the sensor, and converts the sensor signal into a 4-20 mA signal for connection to a control panel. Diagram 4: Xgard Type 1 PCB layout 8
2. Installation WARNING This detector is designed for use in Zone 0, Zone 1 and Zone 2 hazardous areas, and is certified II 1 G Ex ia IIC T4 when used with a suitable Zener barrier or galvanic isolator. Installation must be in accordance with the recognised standards of the appropriate authority in the country concerned. For further information please contact Crowcon. Prior to carrying out any installation work ensure local regulations and site procedures are followed. English 2.1 Location The detector should be mounted where the gas to be detected is most likely to be present. The following points should be noted when locating gas detectors: • To detect gases which are lighter than air, detectors should be mounted at high level and Crowcon recommend the use of a collector cone (Part No. C01051) and accessory adaptor (Part No. M04666). • To detect heavier than air gases, detectors should be mounted at low level. • When locating detectors consider the possible damage caused by natural events e.g. rain or flooding. For detectors mounted outdoors Crowcon recommend the use of a Spray Deflector (Part No. C01052) and accessory adaptor (Part No. M04666). • Mounting of oxygen detectors requires knowledge of the gas displacing the oxygen. For example, carbon dioxide is heavier than air and collects in low lying areas. It will displace oxygen and so detectors should be placed at low level. • Consider ease of access for functional testing and servicing. • Consider how the escaping gas may behave due to natural or forced air currents. Mount detectors in ventilation ducts if appropriate. • Consider the process conditions. For example, ammonia is normally lighter than air, but if released from a cooling system, the gas may fall rather than rise. The placement of sensors should be determined following advice of experts having specialist knowledge of gas dispersion, the plant processing equipment as well as safety and engineering issues. The agreement reached on the locations of sensors should be recorded. Crowcon would be pleased to assist in the selection and siting of gas detectors. 9
Page 1: Xgard Type 1 Gas detectors Détecte
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Page 7 and 8: Xgard Overview ATEX certification l
Page 9 and 10: Xgard English Slots to suit M6 or 1
Page 11 and 12: Xgard Français (Où applicable, le
Page 13: Overview Product overview Xgard are
Page 17 and 18: Xgard 2. Installation 2.4 Electrica
Page 19 and 20: Xgard 3. Operation 9. If the contro
Page 21 and 22: 4. Specification Junction box mater
Page 23 and 24: Xgard 5. Spare parts and accessorie
Page 25 and 26: Xgard Warranty Our liability in res
Page 27 and 28: Vue d’ensemble Vue d’ensemble d
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Page 31 and 32: Xgard 2. Installation 2.4 Connexion
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Page 37 and 38: 5. Pièces détachées et accessoir
Page 39 and 40: Garantie Cet équipement a été in
Page 41 and 42: Deutsch Sicherheitsinformationen
Page 43 and 44: 1. Einleitung 1.1 Eigensicherer Det
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Page 57 and 58: Introducción al producto Introducc
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Xgard 3. Funcionamiento periodo má
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5. Piezas de repuesto y accesorioss
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Garantía Este equipo sale de fábr
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Italiano Informazioni per la sicure
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1. Introduzione 1.1 Rilevatore di g
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Xgard 2. Installazione 2.2 Montaggi
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3. Utilizzo ATTENZIONE Prima di ese
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Xgard 3. Utilizzo 3.2 Manutenzione
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4. Specifiche Materiale della scato
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Xgard 5. Parti di ricambio e access
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Xgard Dichiarazione di garanzia La
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Productoverzicht Overzicht Xgard is
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2. Installatie WAARSCHUWING Deze de
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Xgard 2. Installatie 2.4 Elektrisch
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Xgard 3. Bediening ⎛160 150 40
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Xgard 3. Bediening Sensoren die lan
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5. Reserveonderdelen en accessoires
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Garantieverklaring Deze apparatuur
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Informações de segurança Portugu
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1. Introdução 1.1 Detector de gá
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Xgard 2. Instalação 2.2 Instalaç
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3. Operação AVISO Antes de execut
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Xgard 3. Operação 3.2 Manutençã
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Peças sobressalentes e acessórios
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Garantia Este equipamento sai da no
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UK Office Crowcon Detection Instrum
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Xgard Type 1 - Shawcity Limited

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