According to ASTM E3158 - 18, which point testing method is recommended for sensitive environments?

The recommendation for single-point testing in sensitive environments, as outlined in ASTM E3158 - 18, lies in its ability to provide a focused and precise measurement of airtightness at a specific location. This method minimizes potential disturbances or variations in environmental conditions that could impact the test results. In sensitive environments, such as laboratories or clean rooms, achieving and maintaining a controlled atmosphere is crucial. Single-point testing allows for a more straightforward assessment and can be done without introducing excessive variables during the testing process.

Other methods, such as multi-point testing or two-point testing, while providing a broader data set across multiple locations, can introduce complexities and fluctuations that may not be ideal for sensitive environments. Zero-point testing is typically not viable in practical applications for measuring airtightness as it lacks a reference point for comparison. Thus, single-point testing emerges as the most effective choice for ensuring accuracy and reliability in sensitive settings.