Testo 350 Calibration - Actoolsupply.com

www.actoolsupply.com4.2 Adjustment/readjustment with Testo devices -options for the userMost Testo flue gas analysers offer the user the option of controllingor adjusting the device by means of calibration gases. To keepthis as simple and reliable as possible, a 1-point recalibration(“recal”) is carried out. This recalibration can be used for:• Narrowing the measuring range down to specific requirements(increasing the accuracy for a certain measuring range)• “Tightening” the sensor signal after a loss of sensitivity (eliminatingsensor ageing).Indication [ppm]Slope characteristicafter “recal”300Slope characteristicbefore “recal”280Zero point300Test gas concentration [ppm]The zero point is automatically checked by the measuring instrumentin fresh air during the ON phase. Separate zero point correctionis not required in electrochemical measuring cells, unlike opticalsensors, because the zero point is extremely stable.Since test gases are absolutely essential for every readjustmentand calibration, in most countries Testo offers a control, readjustmentand calibration service in its own, well-equipped laboratory.www.actoolsupply.com19