How many times do you need to pump a 'wet' tester for an accurate CO2 sample?

For obtaining an accurate CO2 sample using a 'wet' tester, it is essential to understand that the process involves displacing a certain volume of fluid to ensure proper measurement. Pumping the tester between 18 and 20 times strikes an optimal balance that allows for sufficient mixing and stabilization of the gases within the testing apparatus. This range helps in achieving a reliable and representative CO2 measurement from the combustion process being evaluated.

In the context of combustion analysis, ensuring the accuracy of the CO2 reading is crucial for assessing the efficiency of the heating system and for diagnosing any potential issues. If the number of pumps is too low, the sample may not fully represent the combustion gases, leading to inaccurate readings. By following the guideline of pumping between 18 and 20 times, technicians can ensure that the sample is adequately conditioned for measurement, reflecting the actual performance of the boiler or furnace being tested.