How to quickly judge whether the laser particle size analyzer is normal?

Quickly judge whether the laser particle size analyzer is normal by observing the background state.If the background value is greater than 4 or the shape of the histogram is uneven, it means that the alignment is bad,A background value of less than 0.3 indicates that the brightness of the laser has decreased;If the length of the background histogram exceeds 20 channels, it means that the sample cell is dirty or fogged and needs to be cleaned or processed;There is a background signal to the right of the background coordinate, and it is necessary to check whether the sample cell and the medium are clean.Different brands of laser particle size analyzers may have different graphic forms of the background, but in any case, the background is the light signals received by the detectors at various angles after the laser passes through the sample cell filled with pure media.It can directly reflect the status of the instrument: if the background is normal, the instrument is normal; if the background is not normal, the instrument is abnormal. Therefore, by observing the background state, you can quickly judge.