【求助】马尔文MS2000校验问题，急需解答，谢谢！

The purpose of the qualification measurement is to prove the fidelity of the optical transducer, that is to ensure that measurements of ideal samples conform to theoretical prediction. To achieve this we require a scattering sample that generates a significant signal over the whole dynamic range of the detector. It is a property of light scattering from fine particles that any sample generates scattering over all angles and thus a single sample can be used.
The choice of sample for performance verification is made to attempt to optimise the ability of the measurement to identify system calibration problems. The sample chosen is a good compromise size that allows reliable and reproducible measurements that are nevertheless sensitive to changes in system calibration.

标样应该比较好的反映了仪器状态，激光粒度仪测量是结合全部检测器信号计算出来的，并没有其他电子测量仪器量程切换处理过程，因此并不需要在全量程多段校准。如果老师还是不能接受，有条件的话可以用大粒子标样验证一下。

一般来讲,验证或校验时范围的选择应该涵盖日常检测时的范围,否则往往会有楼主所说的那种疑问,现在没做过这样的检测了,不知道有没有超过400um的标准粒子,如果有,最好是做一下.

谢谢楼上的两位高手，我们准备买500un的标准物质，可咨询马尔文公司他们说有这个标准物质，可没有检测结果的范围，结果没有公证，只能参考了。