一、因操作不当或其它原因引起的故障现象 :不论如何操作 ,最后测试结果均显示为Ｒ４５７＝ＥＥＥＥ而不能正常工作。经过多台相同仪器的检测证明 ,出现上述问题是由于标准白板的三个波长的光谱反射率的值为零或其中一个为零。当正确输入标准白板的三个波长的反射率值之后 ,该 First, due to improper operation or other causes of failure phenomenon: no matter how the operation, the final test results are shown as R457 = EEEE and can not work properly. Tests conducted on the same instrument proved that the above problem was caused by the fact that the spectral reflectance of the three wavelengths of the standard whiteboard is zero or one of them is zero. This is after the correct values ​​for the three wavelengths of the standard whiteboard are entered