When are continuous radon monitoring devices required to undergo recalibration?

Continuous radon monitoring devices are required to undergo recalibration once per year to ensure their accuracy and reliability in measuring radon levels. This annual recalibration is crucial because the performance of these devices can drift over time due to environmental conditions, wear, or electronic variations. Regular recalibration helps maintain the integrity of the measurements and ensures that results remain within acceptable limits. Calibration confirms that the device is still reacting correctly to radon concentrations and producing valid results for safety assessments and compliance requirements. Higher frequency calibration intervals, such as every month or every six months, are not typically necessary given the current standards and practices in radon measurement, while recalibrating every two years could risk inaccurate measurements during that extended period. Thus, the annual recalibration is a balanced approach to device maintenance and performance assurance.