Views:27 Author:Site Editor Publish Time: 2020-10-01 Origin:Site
This is a simple way to quickly check the pipette in your hand. Through the inspection, you can judge whether the pipette is in a normal working state.
1. Leak detection: If the pipette leaks, the sampling result will definitely not be accurate, which will directly affect the final result of the experiment, and the consequences will be more serious. So, how to tell if the pipette is leaking? This requires a simple test on it. First, take a transparent container, fill it with water, install a tip on the pipette to be tested, suck up the water, wait for 20 seconds, and observe the liquid level inside the tip Is it down? If it does, it means that the pipette is leaking. What should I do at this time?
2. Find the cause of the failure: Firstly, check whether the suction head is installed in place, replace the suction head and test again to eliminate the air leakage caused by the suction head; then, check the port part of the white sleeve (ie white sleeve Whether the part in contact with the suction head is scratched; then, check whether the connecting nut between the white sleeve and the handle is loose. If none of these conditions, it means that the seal ring or piston assembly is damaged.
3. Check the appearance of the pipette: press the discharge button to see if it is smooth, listen for noise, and observe whether the discharge rod is bent; rotate the adjustment button to observe whether the counter reading is deviated.