Welcome to Qinsun Instruments Co., Limited.
- +86-21-6780 0179 |
- info@qinsun-lab.com |
- Customer Services
The vacuum drying oven is specially designed for drying heat-sensitive, easily decomposable and oxidizing substances. Even complicated items can be dried quickly and an intelligent digital temperature controller is used to set, display and control the temperature.
Environmental requirements and precautions for vacuum drying furnaces:
1. Environmental requirements for vacuum drying furnaces: 5~40°C b) Relative humidity: ≤85% RHc) Power supply voltage : AC220V±10%50Hzd) Es there is no vibration and no corrosive gas in the environment.
2. Vacuum debugging: a) Close the door and tighten the door handle, close the vent valve (make sure). Rubber The hole on the plug and the hole on the bleed valve are twisted 90°), open vacuum valve (turn counterclockwise 90°), the vacuum valve switch may be tight for the first time, and can be twisted by force. b) Use the vacuum connection pipe (inner diameter: Φ16mm, wall thickness: 10mm) to connect the exhaust pipe (outer diameter: Φ16mm) of the vacuum drying box and the vacuum pump (type 2XZ-2, outer diameter Φ16mm) of the air inlet) firmly ( Types 6090 and 6210) connected). Turn on the vacuum pump and start pumping air. When the vacuum gauge reading reaches -0.1MPa, first close the vacuum valve, and then close the vacuum pump power supply to prevent the vacuum pump oil from flowing back to the working space. (Types 6090 and 6210 have no vacuum valve and can be closed directly. The vacuum pump is powered from the panel.) At this time, the inside of the box is in a vacuum state.
3. Debugging the vacuum drying oven: After the debugging of the vacuum degree is completed, the following operations can be performed:
1. Turn on the vacuum box and turn onnd the operating indicator should light up (for type 6090 or 6210 switch on the switch of the temperature controller). The temperature controller performs a self-test when it is switched on, the PV screen shows the temperature measured in the working area, and the factory set temperature is displayed on the SV screen.
2. When the temperature in the working space is close to the set temperature, the HEAT light will flicker on and off, indicating that the heater is entering the PID adjustment phase. Sometimes the measured temperature of the instrument exceeds the set temperature, and sometimes it is lower than the set temperature, which is a normal phenomenon. If the measured temperature is close to or equal to the set temperature, wait 1 to 2 hours. The studio then changes to a constant temperature state and the objects enter the drying phase.
3. Change the set temperature:
1) Press the function button (SET) of the temperature controller; after the PV screen shows the SP sign, you can use the button to set the temperature change (6090 and 6210 types should be set and changed separately for 2 and 3 meters, the following are similar);
2). After the change is complete, press the SET button again, and the PV screen will display the ST sign, set the timer time. If you don't use the timing function, leave ST=0 anyway;3). Press the SET button again so the PV screen shows the studio temperature and the SV screen shows the new set temperature. The meter's AT and HEAT lights will illuminate and the meter will return to the heating mode at this time.
4. If the required temperature is low, you can use the second setting method. If the requiredFor example, if the working temperature is 70 °C, set 60 °C first and then 70 °C a second time. The temperature overshoot starts to decrease. ℃, which can reduce or even eliminate the overtemperature phenomenon, and transition to the constant temperature state as soon as possible.
5. When the object has dried, turn off the power. When the temperature rises, open the vent valve to bring the vacuum degree to 0, wait about 5 minutes, and then open the door.
Fourth, precautions for the vacuum drying oven:
1. The body must be effectively grounded to ensure safe use.
2. It should be used in an environment where the relative humidity is ≤ 85% RH, where there are no corrosive gases, no vibration sources and no electromagnetic field.
3. There are no exes in the studioanti-explosion and anti-corrosion treatment, and items that are flammable, explosive and corrosive gases are not allowed to be dried.
4. The vacuum pump may not work for a long time. When the degree of vacuum meets the needs of dry goods, the vacuum valve should be closed first, and then the power of the vacuum pump should be turned off. Power supply to the vacuum pump, keep sucking, which can extend the life of the vacuum pump.
5. When the dry object is wet, insert a filter between the vacuum drying box and the vacuum pump to prevent the wet gas from entering the vacuum pump and causing the vacuum pump to malfunction.
