IGD 2-Wire Systems, Руководство по установке

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11
Area Coverage for Gas Detectors
Cryogenic Gas Detection
Calibration and service Requirements for Gas Detection Systems
Typically up to 75 SQ M Coverage
In a similar manner to smoke detectors, a gas detector can provide up to 75SQ M area coverage based on
a 5M radius of operation. There are many factors affecting this, geometry of a room, equipment in the area,
gas characteristics, ventilation air flows etc. IGD can support throughout the survey, design and installation
process to ensure the best possible result on site.
Applications involving Cryogenically cooled gases such as liquid Nitrogen or Helium need careful
consideration for gas detection. On initial release as cryogenically cooled gases can typically be at lower
temperature and high density than their surroundings they will behave differently than when in their
gaseous state. In such cases it should be considered if two sets of detection is required, one for the life
safety zone and one for low level detection in the gases cooled state. Applications involving such gases
are recommended to be surveyed.
All gas detection systems require regular checking and calibration to be in compliance with the UK
factories act. The service and calibration period will be a function of the application based on
environmental in service conditions. It is extremely important to ensure a service plan is in place for any
gas detection system installed as part of a site safety system. IGD can work with operators to provide
advice, service and spares to ensure an appropriate level of cover.
Max 5M Radius