Usage of vacuum drying oven: 1. Working environment requirements: a) temperature: 5 ~ 40℃ b) relative humidity: ≤ 85% RH c) power supply voltage: AC 220v 10% 50hd) There is no strong vibration and corrosive gas around. 2. Vacuum debugging: a) Close the door and screw the door handle in place. B) Connect the exhaust pipe (external diameter: φ 16 mm) of the vacuum drying oven and the vacuum pump (2XZ-2 type, external diameter of air inlet: φ 16 mm) firmly (6090 and 6265433). Turn on the power of the vacuum pump and start pumping air. When the indicated value of the vacuum gauge reaches -0. 1Mpa, close the vacuum valve first, and then turn off the power supply of the vacuum pump to prevent the oil of the vacuum pump from flowing back to the working room. (Models 6090 and 62 10 have no vacuum valve, so the power supply of the vacuum pump on the panel can be directly turned off) At this time, the box is in a vacuum state. 3. Debugging of vacuum box: After the vacuum degree debugging is completed, the following operations can be performed: a) Turn on the power supply of vacuum box, and the power supply indicator light should be on (turn on the thermostat switch for model 6090 and model 62 10 respectively). The thermostat is powered on for self-inspection, and the PV screen shows the measured temperature in the studio, and the SV screen shows the factory set temperature. Lights such as AT and HEAT on the thermostat should be on, indicating that the instrument has entered the heating working state. B) Modify the set temperature 1. Press the function key (set) of the temperature controller; After the SP character is displayed on the PV screen, you can modify the set temperature by pressing the key (2 meters and 3 meters of 6090 and 62 10 should be modified separately, and the following is the same). 2. After the modification, press the SET key again, and the PV screen will display ST characters to set the timing time. If you don't use the timer function, let it be 3. Press the SET key again, so that the PV screen displays the studio temperature, and the SV screen displays the new set temperature. The AT and he AT lights of the instrument are on, and the instrument enters the heating working state again. C) When the temperature in the working room is close to the set temperature, the heating lamp flashes, indicating that the heating has entered the PID adjustment stage. Sometimes the temperature measured by the instrument exceeds the set temperature, and sometimes it is lower than the set temperature, which is a normal phenomenon. When the measured temperature is close to or equal to the set temperature, wait 1~2h, at which time the studio enters the constant temperature state and the articles enter the drying stage. D) When the required temperature is low, the secondary setting mode can be adopted. For example, if the required working temperature is 70℃, set it at 60℃ for the first time, and then set it at 70℃ for the second time after the isothermal overshoot begins to fall back, it can reduce or even eliminate the temperature overshoot and enter the constant temperature state as soon as possible. E) When the articles are dry, turn off the power supply. If the temperature increases, open the air valve to make the vacuum degree zero, and then open the door for about 5 minutes. 4. If the humidity of dry matter in the working room is high, the generated moisture will affect the performance of the vacuum pump. It is suggested that a "dryer/filter" be connected in series between the drying box and the vacuum pump. Our company can provide dryers with external dimensions of φ 120× 300mm and external diameter of interface of φ 16 as required. 5. If it is necessary to add inert gas such as nitrogen during the drying of articles, it should be indicated in the contract that the air inlet valve should be added. (Note: 1. If the vacuum pump is normal and meets the technical requirements, it can't be vacuumized. Open the door of the box, screw the door buckle on the box inward with the wrench in the product accessory to make it shorter, and then close the door. 2. This vacuum drying oven cannot be used as an electric heating drying oven, because the working room is not in a vacuum state, and the measured temperature has a great error with the actual temperature in the working room. ) Note: 1. The shell of vacuum furnace must be effectively grounded to ensure safe use. 2. The vacuum box should be used in an environment with relative humidity ≤85%RH and no corrosive gas, strong vibration source and strong electromagnetic field around. 3. There is no explosion-proof and anti-corrosion treatment in the vacuum box studio, and it is not allowed to dry articles that are easily exposed, explosive and corrosive. 4. The vacuum pump can't work for a long time. Therefore, when the vacuum degree meets the requirements of dry goods, the vacuum valve should be closed first, and then the vacuum pump power supply should be turned off. When the vacuum degree is less than the requirement of dry goods, the vacuum valve and vacuum pump power supply should be reopened to continue vacuumizing, which can prolong the service life of vacuum pump. 5. If the dry goods are wet, it is best to add a filter between the vacuum box and the vacuum pump to prevent the wet gas from entering the vacuum pump and causing the vacuum pump to malfunction. 6. If the dried articles become light in weight and small in size (small particles) after drying, a filter screen should be added at the vacuum port of the studio to prevent the vacuum pump (or solenoid valve) from being damaged by inhaling the dried articles. 7. After repeated use, the vacuum box cannot be evacuated. At this time, the door seal should be replaced or the extension distance of the door buckle in the box should be adjusted to solve the problem. When the drying temperature of vacuum box is higher than 200℃, there will be slow air leakage (except 6050, 6050B, 605 1 and 6053). At this time, unscrew the heater base with an Allen wrench, replace the sealing ring or tighten the heater base to solve the problem. 8. If the rubber plug of the bleeder valve is difficult to rotate, it can be lubricated with proper amount of grease. (such as vaseline) 9. Except for maintenance, the left box cover (except models 6090 and 62 10) cannot be disassembled to avoid damaging the electrical control system. 10. The vacuum box should always be clean. Door glass should not be wiped with reactive chemical solution, but with soft cotton cloth. 1 1. If the vacuum box is not used for a long time, clean the exposed electroplated parts and apply neutral grease to prevent corrosion. Cover it with a plastic film dust cover and put it in a dry room to prevent electrical components from being damaged by moisture and affect their use.
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