Vacuum drying oven use and precautions
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a) Temperature: 5 ~ 40 ° C
b) Relative humidity: ≤85% RH
c) Power supply voltage: AC220V±10%50Hz
d) There is no strong vibration and corrosive gas around. 2. Vacuum debugging:
a) Close the door and screw the door handle into place, close the bleed valve (turn the hole on the rubber plug 90° to the hole on the bleed valve), open the vacuum valve (rotate 90° counterclockwise),* For the second use, the vacuum valve switch may be tight and can be rotated by force.
b) Connect the vacuum drying box exhaust pipe (outer diameter: Φ16mm) and vacuum pump (2XZ-2 type, inlet outer diameter Φ16mm) with the vacuum fitting pipe (inner diameter: Φ16mm wall thickness: 10mm) (6090 and 6210) Connected). Turn on the vacuum pump power supply and start pumping. When the vacuum gauge indication value reaches -0.1Mpa, turn off the vacuum valve and then turn off the vacuum pump power supply to prevent the vacuum pump oil from flowing back into the working chamber. (Models 6090 and 6210 have no vacuum valve and can be directly closed. Vacuum pump power on the panel) At this time, the inside of the box is under vacuum.
3. Vacuum box debugging:
After the vacuum degree is debugged, the following operations can be performed:
a) Turn on the vacuum box power supply. At this time, the power indicator light should be on (6090 and 6210 models should be turned on separately.) The temperature controller is powered on and self-test. The PV screen displays the temperature measured in the working room. The SV screen displays the factory setting. temperature. The AT and HEAT lights on the temperature controller should be on, indicating that the instrument enters the warm working state.
b) Modify the set temperature 1. Press the function key (SET) of the temperature controller; after the SP screen displays the SP character, you can use the button to change the set temperature (6090 and 6210 to 2 and 3 instruments should be respectively Set the modifications, the following are the same).
2. After the modification is completed, press the SET button again, the PV screen displays the ST character and sets the timing time.
If you do not use the timing function, still let its ST=0
3. Press the SET button again to make the PV screen display the studio temperature and the SV screen to display the new set temperature. The meter AT and HEAT lights are on, and the meter re-enters the warming state.
c) When the temperature in the working chamber is close to the set temperature, the HEAT light will be dimly lit and dark, indicating that the heating enters the PID adjustment stage. The meter sometimes measures the temperature exceeding the set temperature, and sometimes the temperature below the set temperature is normal. When the measured temperature is close to or equal to the set temperature, the studio enters a constant temperature state after 1~2h, and the item enters the drying stage.
d) When the required temperature is low, the secondary setting method can be used, such as the required working temperature of 70 ° C, * first set 60 ° C, the temperature overshoot starts to fall back, and then the second time set 70 ° C, This can reduce or even eliminate the temperature overshoot phenomenon and enter the constant temperature state as soon as possible.
e) When the item is dry, turn off the power. If the temperature is lowered, open the air release valve to make the vacuum level 0. Wait for about 5 minutes to open the door.
4. If the humidity of the dry matter in the working chamber is large, the generated moisture will affect the performance of the vacuum pump. It is recommended to insert a “drying/filter†between the drying box and the vacuum pump. The company can be equipped with a dryer with a shape of Φ120×300mm and an outer diameter of Φ16.
5. If an inert gas such as nitrogen is required during the drying of the article, it should be noted in the contract that an intake valve is added.
(Note: 1. If the vacuum pump is normal and meets the technical requirements and cannot be vacuumed, open the door and use the wrench in the product accessory to tighten the door buckle on the box to close it and close it again. 2. This vacuum The drying box cannot be used as an electric drying oven. Because the working chamber is not in a vacuum state, the measurement temperature is extremely different from the actual temperature in the working chamber.
Precautions:
1. The vacuum box housing must be effectively grounded to ensure safe use.
2. The vacuum box should be used in an environment where the relative humidity is ≤ 85% RH, there is no corrosive gas around, no strong vibration source and strong electromagnetic field.
3. The vacuum box studio is not treated with explosion-proof, anti-corrosion, etc., and it is not allowed to dry items that are easy, explosive, and prone to corrosive gases.
4. The vacuum pump can't work for a long time. Therefore, when the vacuum reaches the requirements of dry goods, the vacuum valve should be closed first, then the vacuum pump power should be turned off. When the vacuum is less than the requirements of the dry items, then the vacuum valve and the vacuum pump power supply are turned on, and the vacuum is continued. This will extend the life of the vacuum pump.
5. If the dry items are wet, add a filter between the vacuum box and the vacuum pump to prevent moisture from entering the vacuum pump, causing the vacuum pump to malfunction.
6. Dry items should be light weight and small in size (small granular shape) after drying. Vacuum should be added to the working chamber to prevent the vacuum pump (or solenoid valve) from being inhaled by the dry matter.
7. After the vacuum box is used for many times, it will not be able to vacuum. In this case, the door seal should be replaced or the door buckle on the box should be adjusted to extend the distance. When the drying temperature of the vacuum box is higher than 200 °C, it will produce slow air leakage (except 6050, 6050B, 6051, 6053). At this time, remove the back cover of the box and loosen the heater base with an Allen key to replace the seal. Circle or tighten the heater base to solve.
8. If the rubber plug of the bleed valve is difficult to rotate, apply a proper amount of grease to the inside. (such as Vaseline)
9. Except for maintenance, the left side cover (except models 6090 and 6210) cannot be removed to avoid damage to the electrical control system.
10. The vacuum box should always be kept clean. Do not wipe the door glass with a reactive chemical solution and wipe it with a soft cotton cloth.
11. If the vacuum box is not used for a long time, wipe the exposed plating parts and apply neutral grease to prevent corrosion. Put on the plastic film dust cover and place it in the dry room to avoid damage to the electrical components. use.
12. Abnormal imagination in use, please cut off the power and get it with our company in time!
Main: tunnel oven, open door oven, vacuum oven, double cone vacuum dryer