SIMRAD GD10P - IR GAS DETECTOR - ICEWeb

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20Figure 4.3Test procedure
215. TECHNICAL DESCRIPTION5.1 IntroductionThe GD10P Gas Detector from Simrad Optronics is a point detector foruse in hazardous areas. A high-stability, solid-state infrared radiationsource combined with the latest developments in optical and electronicdesign have led to the realisation of a compact, accurate and costeffectiveinstrument able to monitor explosion dangers in real-worldenvironments.5.2 The GD10P conceptThe concept is based on measurement of infrared radiation passingthrough a volume of gas. The GD10P employs a dual beam, dualwavelength measuring principle with separate optical detectors formaximum stability and reliability.Since different types of gas have unique absorption spectra, they caneasily be identified by proper selection of an infrared wavelength atwhich absorption is measured. Radiation at another wavelengthmeasures the overall transmission through the optical system and theair volume. By comparing the transmission at the two wavelengths, thegas concentration in the air is determined. Having chosen awavelength which is characteristic of one type of gas, other types ofgas will not cause false alarms.Using a solid-state IR source instead of a lamp ensures high reliabilityand long-term stability with no regular maintenance or calibrationrequired during equipment lifetime.Figure 5.1Transmittance as a function of wavelength
Page 1: SIMRAD GD10P - IR GASDETECTOROPERAT
Page 4 and 5: 5.4 GAS DETECTION SYSTEM...........
Page 6 and 7: 41.2 ConstructionA complete GD10P G
Page 8 and 9: 6- Electrical connection 3 wires (M
Page 10 and 11: 8EN 61779-4/IEC 61779-4EN 50081-1EN
Page 12 and 13: 10In order to achieve minimum respo
Page 14 and 15: 122.1.4 Mounting the GD10PThe detec
Page 16 and 17: 142.2.2.2 Retrofit mountingFor retr
Page 18 and 19: 163. OPERATION3.1 Start-up procedur
Page 20 and 21: 18• If there is an air movement o
Page 24 and 25: 22Refer to Figure 5.2 below.Radiati
Page 26 and 27: 24Converting % LEL to % v/v is base
Page 28: 261 21: Plate Adapter (junctionbox/

SIMRAD GD10P - IR GAS DETECTOR - ICEWeb

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