User manual VAISALA GMM112 DATASHEET

[. . . ] www. vaisala. com GMM112 Carbon Dioxide Module for HVAC Applications Features/Benefits Compact, OEM module for demand-controlled ventilation and other CO2 measurement applications Incorporates Vaisala CARBOCAP®, the silicon based NDIR sensor with unique internal referencing Advanced, single-beam, dual wavelength measurement with no moving parts Excellent long-term stability Ideal for ventilation control in all types of occupied spaces The Vaisala CARBOCAP® Carbon Dioxide Module GMM112 is a basic CO2 measurement module. Most of us spend 90% of our time indoors. [. . . ] The tunable FPI filter measures CO2 absorption, and simultaneously a reference wavelength. This internal reference measurement compensates effectively for any changes in the optical path, such as light source intensity changes and contamination. In the HVAC market, this type of reference measurement is a unique feature to Vaisala CARBOCAP® products, distinguishing them from competitors' comparative products that do not have a reference measurement at all, or have an indirect reference measurement, which is based on an assumed background CO2 levels. hospitals, work-places, residential buildings, retirement homes), the assumed background CO2 level reference is simply not applicable. The true internal reference measurement of Vaisala CARBOCAP® CO2 transmitters provides years of stable CO2 measurements. The GMM112 Carbon Dioxide Module is designed especially for DCV (Demand Controlled Ventilation) applications with three optional CO2 measurement ranges of 0. . . 2000 ppm, 0. . . 5000 ppm and 0. . . 10000 ppm. Technical data Performance CO2-measurement range 0 . . . 10000 ppm ± (2 % of range + 2 % of reading ± 5 % of range/5 years 1 min -0, 35 % of reading / °C +0, 15 % of reading/hPa 1 min, 10 min for full. specification > 10 years Dimensions Dimensions in mm Accuracy (including repeatability, nonlinearity and calibration uncertainty) Long-term stability Response time T90 Temperature dependence, typical Pressure dependence, typical Warm-up time Product lifetime mA V 0 B A 0 24V mA V 0 B A 0 24V 25 Temperature -5 . . . [. . . ] All specifications -- technical included -- are subject to change without notice. 96 Ø3. 2 [. . . ]