Safety Information - Crowcon Xgard IR Instructions D'installation, D'utilisation Et D'entretien

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Safety information

• Xgard IR gas detectors must be installed, operated and maintained in strict accordance with
these instructions, warnings, label information, and within the limitations stated.
• The lid on Xgard IR must be kept tightly closed until power to the detector is isolated oth-
erwise ignition of a flammable atmosphere can occur. Before removing the cover for main-
tenance or calibration purposes, ensure the surrounding atmosphere is free of flammable
gases or vapours.
• Maintenance and calibration operations must only be performed by qualified service person-
nel.
• Only genuine Crowcon replacement parts must be used, substitute components may invali-
date the certification and warranty of the detector.
• Xgard IR detectors must be protected from extreme vibration, and direct sunlight in hot
environments as this may cause the temperature of the detector to rise above its specified
limits and cause premature failure. A sunshade is available for Xgard IR.
• This equipment must not be used in a Carbon Disulphide atmosphere.
• Xgard IR will not detect hydrogen.
Hazardous area classifications:
Zone 0: An area classified as Zone 0 will have ignitable concentrations of flammable gases,
vapours or liquids either continuously present or present for long periods of time under
normal operating conditions. Intrinsically Safe (Exia) detectors are suitable for use in
Zone 0, provided they are connected via a suitable zener barrier or galvanic isolator.
Zone 1: An area classified as Zone 1 is likely to have ignitable concentrations of flammable gases,
vapours or liquids present under normal operating conditions. Flameproof (Exd) detectors
are suitable for use in Zone 1. Intrinsically Safe (Exia) detectors are suitable for use in
Zone 1, provided they are connected via a suitable zener barrier or galvanic isolator.
Zone 2: An area classified as Zone 2 is not likely to have ignitable concentrations of flammable
gases, vapours or liquids present under normal operating conditions. Flameproof (Exd)
detectors are suitable for use in Zone 2. Intrinsically Safe (Exia) detectors are suitable
for use in Zone 2, provided they are connected via a suitable zener barrier or galvanic
isolator.
Notes:
In North America 'Divisions' are used to categorise risk where:
Division 1 is equivalent to Zone 0 or 1
Division 2 is equivalent to Zone 2
Under European ATEX rules hazardous area equipment has been re-defined under 'equip-
ment categories' where:
Equipment Category 1 is suitable for Zone 0
Equipment Category 2 is suitable for Zone 1
Equipment Category 3 is suitable for Zone 2
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