How to clean the pipeline of Shengkang SCSZ706 acid value tester?

Take Shengkang SCSZ706 acid value tester as an example.

The neutralization solution is KOH ethanol solution. After the experiment, some liquid will remain in the neutralization liquid pipeline. After the alcohol volatilizes, KOH solid will crystallize in the neutralization liquid pump. If the cleaning is not timely or thorough, the accumulated KOH solid will block the injection pump, resulting in the inability to suck the liquid. After the acid value tester completes the experiment, the neutralization liquid pipeline must be cleaned in time. The cleaning method is as follows: After completing the experiment, press the "Exit" key, and the interface for cleaning the pipeline will appear. Replace the neutralization liquid behind the instrument with distilled water, and press the "Start" key, and the instrument will automatically clean the neutralization liquid pipeline. If you want to clean the pipeline thoroughly, you can use distilled water instead of neutralization solution. Then enter the instrument startup interface. There are two blank areas in the middle of the "Settings", "Recording" and "Measurement" buttons at the bottom of the screen. Click on the blank area three times in the order of first left and then right to enter the instrument parameter calibration interface. On the right side of this interface, there is "neutralization speed". Click the number below the neutralization speed and press "OK" to start cleaning the pipeline. After about five minutes, replace distilled water with anhydrous ethanol, wait for another five minutes, remove anhydrous ethanol, and click the "Exit" button after all the liquid in the neutralization liquid pipeline is drained. That is, the cleaning of neutralization liquid pipeline is completed. When the instrument is used less frequently, all glass bottles behind the instrument need to be cleaned, dried and stored after use.