For accurate readings in an EIC, the test must be conducted under what conditions?

For accurate readings in an EIC (Electret Ion Chamber) radon measurement, conducting the test under stable humidity and temperature conditions is essential.

Stable humidity ensures that the measurements taken are not influenced by fluctuations in moisture levels, which can affect the behavior of radon and its detection within the chamber. High humidity levels can lead to water vapor interfering with radon detection, potentially causing either false positives or negatives.

Similarly, stable temperature conditions are crucial as variations in temperature can impact the ionization process within the chamber, which directly affects the accuracy of radon concentration readings. Temperature influences the density of air and the behavior of radon atoms, potentially skewing the results if a test is conducted in an environment where temperature fluctuates significantly.

By maintaining stable conditions, the readings obtained are more reliable, providing a clearer indication of radon levels without the interference of external environmental factors that can lead to inaccuracies. Therefore, stable humidity and temperature are fundamental for trustworthy radon measurements.