根据ISO 9060，二级标准日射强度计的校准必须使用该仪器，并且推荐用于日射强度计的校准，日射强度计用作比较中的参考仪器。供配备有维护良好的日射强度计的测试机构或测试实验室使用，适用于所有日射强度计。其目的是促进可靠方法的统一应用，以校准日射强度计，因为准确的校准系数是太阳能测试应用或模拟所需的准确半球太阳辐射数据的基础。

Its use is mandatory for the calibration of secondary standard pyranometers according to ISO 9060, and is recommended for the calibration of pyranometers which are used as reference instruments in comparisons. Is intended for use by test institutions or test laboratories equipped with well-maintained pyrheliometers and is applicable to all pyranometers. The object is to promote the uniform application of reliable methods to calibrate pyranometers, since accurate calibration factors are the basis of accurate hemispherical solar radiation data which are needed for solar energy test applications or simulations.