Testo 350 Calibration - Actoolsupply.com

www.actoolsupply.comAlternatively, the test gas can be applied directly without a bypassby using a precision pressure regulator.Precision pressure regulatorFlue gas probeTesto measuring instrumentmax. 30 hPaFig.: Gas adjustment using a precision pressure regulatorWith this method, the pressure of the test gas must be 12”wc(0.433 PSI). Excessive pressure will lead to incorrect results. Theideal recommended maximum pressure at the gas inlet is 8” wx(0.288 PSI). If necessary, the differential pressure of the analysercan be measured in order to check the gas pressure.General informationBefore any gas adjustment/calibration, the devices and the gasroutes from the test gas bottles must be checked for leaktightness.To this end the gas inlet is sealed up, for instance, and an indicationof < 0.03 l/min in devices with integrated flow measurement isachieved.In the case of gases with absorption effects such as NO 2and SO 2,the test gas should be admitted via the tip of the probe. Thisensures that absorption effects in the gas route are compensatedvia this gas adjustment so that the real gas measurements are asprecise as possible.14www.actoolsupply.com