Testo 350 Calibration - Actoolsupply.com

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$Thermographic Monitoring of Refractory Lined Petroleum Refinery ...$

www.actoolsupply.com4.4 Recommended gas concentrationsIn the ideal scenario, test gas concentrations in the range of themeasured flue gas concentrations would be used for adjustment(“recal”). However, limits must be set in the lower and upper measuringrange.1.) The smallest feasible test gas concentrations for adjustmentare:Minimum gas concentrationCOCO lowNONO lowH 2SSO 2NO 2HCCO 2150 ppm50 ppm80 ppm40 ppm40 ppm100 ppm40 ppm4,000 ppm2 vol.%2.) The smallest test concentrations for the calibration check are:Smallestgas concentrationIn comparison: detectionlimits of testo 350 M/XLO 20.5 ... 20.0 vol.% 0.1 vol.%CO 10 ppm 2 ppmCO low5 ppm 0.8 ppmNO 10 ppm 2 ppmNO low5 ppm 0.5 ppmH 2S 10 ppm 1 ppmSO 210 ppm 2 ppmNO 210 ppm 1 ppmC XH Y4,000 ppm 100 ppmCO 20.5 vol.% 0.2 vol.%21www.actoolsupply.com
www.actoolsupply.comSide constraints for the use of low concentrations are:• Use absorption-free hose material• Apply the test gas at the tip of the probe• Use single gases, e.g. NO with nitrogen as the carrier gas• Use the device “warmed up” (warm-up time at least 20 minutes)• Zero with clean air after 20 minutes• Maximum overpressure of the test gas: 12” WC;better: unpressurised via bypass• Pump flow in the unit >_ 0.5 l/min• Apply the test gas for at least 7 minutesFor adjustment in higher concentration ranges, a test gas whoseconcentration corresponds to about 25 - 30 % of the desired measuringrange limit value is sufficient. Because of the greater strain onthe sensors, adjustment at the limit value of the measuring rangeshould only be carried out in exceptional cases.Recommended gas components for mixed gases (e.g. for a fullyconfiguredtesto 350 XL):1st bottle: CO + N 22nd bottle: SO 2+ O 2+ N 23rd bottle: NO 2+ synthetic air4th bottle: H 2S + synthetic air/N 25th bottle: CH 4/propane/butane + synthetic air(Attention! For C xH ymeasurement on thepellistor principle there must be an O 2contentof > 2 % in the test gas).6th bottle: 17% CO 2in N 2(Att: CO 2calibration is twopoint process. Use bottle 1, CO in N 2asyour CO 2“zero” point.)22www.actoolsupply.com
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Testo 350 Calibration - Actoolsupply.com

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