Vacuum drying oven operation method, precautions and maintenance
Vacuum drying oven operation method, precautions and maintenance
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Vacuum drying oven operation method, precautions and maintenance
Vacuum drying oven operation method:
1. The items to be dried are placed in a vacuum drying box, the door is closed, the vent valve is closed, the vacuum valve is opened, the vacuum pump is turned on, and the vacuum is turned on, so that the vacuum in the box reaches -0.1 MPa, the vacuum is turned off. Valve, then turn off the vacuum pump power.
2. Turn the vacuum oven power switch to the “on†position, select the desired set temperature, and the temperature inside the box will start to rise. When the temperature inside the box approaches the set temperature, the heating indicator will be turned on and off repeatedly. , generally within 120min can enter the constant temperature state.
3. When the required working temperature is low, the secondary setting method can be used, such as the required temperature of 60 ° C, * can be set to 50 ° C, the temperature overshoot starts to fall back, and then the second time is set to 60 ° C. . This can reduce or even eliminate the temperature overshoot phenomenon and enter the constant temperature state as soon as possible.
4. According to the dampness degree of different items, choose different drying time. For example, the drying time is longer, the vacuum degree is decreased, and the vacuum is needed again to recover the vacuum degree. The vacuum pump power should be turned on first, then the vacuum valve should be opened.
5. After the drying is finished, the power of the drying box should be turned off, the venting valve should be opened, the vacuum state inside the box should be released, and then the box door should be opened to take out the items. (After releasing the vacuum, if the sealing ring and the glass door are tightly deformed, it is not easy to open the door immediately. After a period of time, after the sealing ring is restored to the original shape, the door can be opened easily.)
Vacuum drying oven precautions:
1. The vacuum box housing must be effectively grounded to ensure safe use.
2. When the vacuum box does not need continuous pumping, the vacuum valve should be closed first, then the vacuum pump power supply should be turned off, otherwise the vacuum pump oil should be poured into the box.
3, take out the torn items to be treated, such as the treatment of flammable items, must be cooled to below the ignition point before the air can be placed, so as not to cause oxidation reaction caused by burning.
4. There is no explosion-proof device in the vacuum box, and it is not allowed to put the explosive materials into the dry.
5. Between the vacuum box and the vacuum pump, cross the filter to prevent the wet body from entering the vacuum pump.
6. If it is not necessary, please do not open the side door at will to avoid damage to the electrical system.
7. This equipment should be equipped with a special air switch.
8. The electrical insulation is intact, and the equipment casing must have reliable protection grounding or protection to zero.
9. The vacuum pump should be replaced with vacuum pump oil frequently.
10. When taking out the processed items, if the processed items are flammable, the air must be cooled to below the ignition point before the air can be placed to avoid the oxidation reaction causing the combustion.
11. This equipment has no explosion-proof device and should not be placed in explosive materials for drying.
12. When using the electric vacuum drying oven, special personnel must be taken care of to ensure the normal operation of the equipment.
13. When the electric vacuum drying oven is not used for a long time, the items in the working room should be taken out and wiped clean to keep the equipment dry.
14. An abnormal phenomenon occurs in the electric vacuum drying oven. It should be inspected and repaired in time. If the fault cannot be accurately determined, it must be in contact with the technical department of the purchasing company.Vacuum drying oven maintenance:
1. The vacuum box should be kept clean at all times. The door glass should be wiped with a soft cotton cloth. Do not use a reactive chemical solvent to avoid chemical reaction and scratching the glass.
2. If the vacuum box is not used for a long time, it should be coated with neutral grease or petroleum jelly on the plated parts to prevent corrosion, and put on the plastic film dust cover to prevent it from being affected by moisture in the dry room.
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