At what voltage should the electret be changed?

The correct voltage at which the electret should be changed is 200 volts. Electrets are critical components in passive radon measurement systems, and they operate within a specific voltage range to maintain their performance and sensitivity in detecting radon gas. When the voltage approaches the 200-volt mark, it typically indicates that the electret has reached its usable limit, and its charge has diminished enough that it may not provide accurate readings anymore. Replacing the electret at this threshold ensures that the detected levels of radon are reliable and the readings remain within acceptable limits for assessment.

Maintaining the correct functionality of the electret is crucial for effective radon monitoring, as it directly affects the accuracy of the measurements taken over time. By adhering to this voltage guideline, technicians can ensure consistent performance of radon detection equipment and safeguard the integrity of radon assessment processes.