XgardIQ CH4 sensor module

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2. Product Notes and Calibration Instructions: Crowcon recommends Methane sensors are initially calibrated on commissioning and re - calibrated every 6 months minimum. Please refer to the XgardIQ i nstallation, operating and maintenance instructions for information on performing sensor zero and calibration. Crowcon recommends calibration is performed using 50%LEL Methane (C H 4 ) in air at a flow - rate of 0.5 - 1 litre per minute . The sensor must be zeroed in clean air before calibration is performed. Note: if a dust filter accessory is fitted to the sensor, calibration must be performed with the filter in - place. Filters must be inspected regularly and replaced as soon as they show signs of contamination. A dust filter will affect the T90 response time of the sensor: response time may be significantly longer than shown on this datasheet. Note: Pellistors can suffer from loss of sensitivity if exposed to poisons or inhibitors such as silicones, sulphides, chlorine, lead or halogenated hydrocarbons. Sensors must be tested regularly with gas to verify response. In applications where such compounds are present we recommend the use of infrared flammable gas sensors. The operational life of the pellistors depends on the application and the amount of gas and contaminants to which the pellistor has been exposed. Under normal conditions (6 monthly calibration with periodic exposure to calibration gas) the life expectancy is 3 - 5 years. The sinter should be inspected regularly; a blocked sinter may prevent gas from reaching the sensor. Note: modules will be calibrated in com pliance with EN60079 - 20 - 1:2010 where 100% LEL methane = 4.4% vol ume. Safety Information : XgardIQ sensor modules are designed to detect gases or vapours in air, and not inert or oxygen deficient atmospheres. Maintenance and calibration operations must be performed by qualified service personnel. Disclaimer: The data contained on this document is provided for guidance purposes only and is correct at the time of issue. Performance data is typical as measured at Crowcon; no guarantees can be made on the performance of individual products. Environmental specifica tions are specific to the sensor listed, and may differ from those shown on the gas detector datasheet.

1. Product: Xgard IQ Sensor Module Subject: Technical Specification Document reference: M07 0037 Issue 3 April 2016 Product: XgardIQ Sensor Module P art Number: XIQ - AA Gas Type: Methane (CH 4 ) Sensor Technology: Pellistor Environmental Specification: Temperature Range: - 4 0ºC to + 7 5ºC. Humidity Range for Operation/Storage: 0 to 99 %rh non - condensing . Recommended Storage Temperature 20ºC Warranty Period: 12 months if operated within stated environmental limits and not exposed to excessive gas concentrations or contaminants (see Product Notes) . Pressure Range: Atmospheric +/ - 10% Performance Characteristics: Expected Operating Life: > 36 months in air if operated within stated environmental limits and not exposed to excessive gas concentrations or contaminants (see Product Notes). Storage Life: 6 months from date of manufacture. T90 Response Time: ~ 25 sec onds Minimum Display Resolution : 1%LEL Linearity < 3 % of full - scale Long Term Sensitivity Drift: < 5 % per year Configuration: XgardIQ Display Name: CH4 Range: 0 - 100%LEL Maximum User - Selectable Range: 0 - 100%LEL Minimum Recommended User - Selectable Range: 0 - 20%LEL Alarm 1 Threshold 20%LEL Alarm 2 Threshold 40%LEL Stabilisation Time 60 seconds


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