Precautions and failure analysis of electric blast constant temperature oven

Precautions and failure analysis of the electric blast constant temperature oven:

1. Before use, be sure to check if the power supply voltage used matches. When using, the power outlet ground wire must be grounded as specified.
2. When using the power supply, avoid touching the electrical parts of the space on the left side of the box with a hand or wipe it with a damp cloth and water. The power should be cut off during maintenance.
3. The power cord should not be wrapped around metal objects. It should not be placed in a place with high temperature or humidity to prevent the rubber from aging and causing leakage.
4. Do not over-extrude the contents of the box, and leave room for natural convection of the air so that the humid air can accelerate out on the wind top.
5. Regularly check whether the silver contacts of the temperature regulator are hairy or uneven. If there is any, use a fine gauze to level the contacts, then use them, and always wipe them clean with a cleaning cloth to make them in good contact (be careful to cut off) power supply). Do not hit the metal pipe of the indoor temperature regulator to avoid affecting the sensitivity.
6. Do not put flammable materials in the dry box without explosion-proof device.
7. After each use, the power supply must be cut off, and the inside and outside of the box should be kept clean. Hang the corresponding logo after cleaning.
8. Explosive, flammable and volatile materials should not be placed in a dry box to avoid an explosion.
9. Items cannot be placed on the shelf between the sample chamber and the heating chamber to avoid affecting heat exchange.
10. Be sure to check the presence or absence of overlap or short circuit of the nickel wire before use.
11. The heating indicator does not light, there are generally three reasons: 1 the bulb is broken; 2 the bulb is in poor contact; 3 the heating system is faulty
12. Turn on the heating switch without heating. There are generally four reasons: 1 nickel-chromium wire breaking; 2 switch and line desoldering; 3 temperature control knob refers to zero position (rotation temperature control knob to the specified temperature scale); 4 relay damage

Virus Specimen Collection Tube

Features
1. Medical grade polypropylene material, high transparency, high sealing and low temperature resistance;
2. With 6ml&10ml two specifications, the cone bottom can stand;
3. The thread structure design of the pipe cover ensures high sealing performance; the pipe cover has no O-ring external rotation design to reduce sample contamination caused by operation and storage;
4. It can cooperate with the sampling swab to perform the functions of collecting and transporting multiple types of samples such as viruses and microorganisms.

Applications

Used for the collection and transportation of clinical influenza, avian influenza, hand-foot-mouth disease, measles and other virus specimens, as well as mycoplasma, ureaplasma, chlamydia and other specimens.


Mixed sample tubes hold more swab heads, so the retention fluid capacity is often larger. For example, single swab retention solution is generally 3ml, 10 and 1 sample tube retention solution is generally 6ml, 20 and 1 retention solution is 10-12ml. The same amount of viral nucleic acid (e.g. 300copies) is stored in 3ml, 6ml, and 12ml copies in concentrations of 100copies/ml, 50copies/ml, and 25copies/ml respectively. Obviously, the greater the number of mixed tests, the lower the virus concentration, the higher the detection sensitivity will be required.
The more the number of mixed tests is, the contact surface between the swab head, the preservation solution and the tube wall will be doubled, which will lead to the increased probability of viral nucleic acid adsorption on other swab heads or tube wall. These factors all lead to higher requirements for system sensitivity.

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