Centrifuge repair, centrifuge in the use process will inevitably show a variety of problems, when the centrifuge encountered problems, how should we repair? In order to prevent these problems, it is very important to maintain and protect the centrifuge.

　　 Alfa Laval Centrifuge is a precision instrument in the laboratory, so it needs to be well protected. It will be cleaned after each experiment, and it will also be protected normally. The following are some basic rules and requirements for centrifuge cleaning and protection.

1、 Centrifuge cleaning requirements

A plurality of cleaning heads or cleaning pipes are arranged in the inner chamber of the centrifuge, and the centrifuge can clean the inside of the centrifuge without opening the cover or during operation.

Centrifuge * point has the following parts:

1. Cleaning of drum bottom and bearing seat;

2. The outer surface of the liquid baffle and the outer surface of the drum drum;

3. Internal and external surface of drum drum;

4. The inner and outer surfaces of the flip cover and the surface of the feeding, scraper and other devices;

5. Inner and outer surface of enclosure.

2、 Centrifuge protection rules

1. One time rule

When the system goes wrong, you can change some states tentatively, one parameter at a time. A few simple changes may solve the problem.

2. Second time comparison rules

Before starting the maintenance, the problem location has been clarified, and perhaps the plan to solve the problem has been confirmed. In other words, we found the right solution before we started. For example, the peak value of the internal standard is found to be lower in the process of sample injection. You can repeat the sample injection to see how the repeatability is. If it is accidentally lower, whether there is bubbles in the quantitative tube. This rule can be used to examine the situation after the system changes. The standard can be injected twice after the activity to check the stability of the storage time and the stability of the chromatographic peak before the formal injection. If the residual peak appears in gradient elution, it can be eluted once without load gradient (is there really a problem?). Using this rule can prevent unnecessary changes and confirm the corrective measures as soon as possible.

3. Alternative rules

Using good parts to replace suspicious parts is a good way to find faults. If you suspect that the detector is causing noise, replace it with a good rotorless vulcanizer detector. If the problem is eliminated, it means that the replaced detector is faulty. This rule can be applied in various scales, ranging from replacing the entire component to replacing the integrated block on the printed circuit board.

4. Change back to the rules

This rule is used together with the substitution rule. After the good parts replace the suspect parts of the melt activity rate meter, the condition is not improved, and the original parts should be replaced from the beginning. The repair cost of this method is * small, and it also prevents the overstock of used parts without rotor vulcanizer. This rule only applies to a single defect. Swap back criteria do not apply to the following situations:

① New parts have been damaged (such as pump sealing gasket) when removed;

② Low component price (such as column lining filter);

③ Risk of damage when installing the original parts from the beginning;

④ Parts that are replaced regularly.

5. Refer to the conditions and rules

There are usually two kinds of reference conditions: standard reference conditions and experimental reference conditions.

Normative reference conditions are also called normative experimental conditions, which are easy to verify from one system to another and from one laboratory to another. The data measured with this condition is helpful to identify the problems in actual experiments and systems. If the system pressure rises under certain experimental conditions, and the pressure is normal under the standard conditions. This indicates that the abnormality of the system of the dissolution rate meter is caused by the changes in the laboratory.