Testo 350 Calibration - Actoolsupply.com

www.actoolsupply.comZero pointWhat the sensor signal unit displays in the absence of the gas tobe verified (= “target gas”).Slope/sensitivitySensor signal per admitted (unit of) concentration. This is determinedin adjustment, calibration and is stored for later measurements.Measuring rangeThis is the concentration range in which the target gas can bemeasured by the sensor/unit with the specified accuracy.Cross-sensitivityThe characteristic of sensors to react not only to the target gas tobe verified, but also to other gases.Response timePeriod of time the sensor/unit needs in order to react to the introducedconcentration with a stable signal/indication. In practice, t xytimes are given, e.g. T 90time. This is the length of time until90 % of the introduced concentration is displayed.OxidationThe combination of elements with oxygen. In gases, for instance,the oxidation of NO produces NO 2.AbsorptionThis is understood to mean the penetration of gases or gas mixturesinto liquids or solid substances. NO 2, for instance, isabsorbed/fixed by rubber or silicone hoses.AdsorptionAdsorption takes place if gases are held solely by the surfaceforces when they come into contact with a solid substance, e.g.the inside wall of a hose. These “captured” gases are then given offagain uncontrolledly (e.g. the presence of NO 2is indicated eventhough no more NO 2gas is applied).www.actoolsupply.com7