This International Standard is applicable to type test methods which permit calibration and measurement of the effectiveness of radon daughters' compensation of radioactive aerosol monitors. This standard defines aerosol characteristics used in these tests and applies the following procedures: – test method permitting the measurement of the response of the monitor relative to alpha and/or beta defined radioactive aerosols; – test method permitting the measurement of the response of the monitor relative to radon daughter-defined aerosols; – test method permitting the measurement of the effectiveness of radon compensation; – test method permitting the measurement of the response of the monitor relative to a mixture of aerosols constituted by radon daughters and by alpha and/or beta radioactive emitters. In addition, it specifies the requirements for acceptance.