The correct use of the drying oven
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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 the area. 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 indicated value of the empty gauge reaches -0.1Mpa, close the vacuum valve and then close the vacuum pump power supply to prevent the vacuum pump oil from flowing back into the working chamber. At this time, the tank is in a vacuum state.
3. Vacuum box debugging of the drying box:
After the vacuum degree is debugged, the following operations can be performed:
a) Turn on the vacuum box power supply, then the power indicator light should be on. The temperature controller is energized and self-tested, the PV screen displays the temperature measured in the working chamber, and the SV screen displays the temperature set at the factory. The AT and HEAT lights on the temperature controller should be on, indicating that the instrument is working in the warming state.
b) Drying box to 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.
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 to exceed the set temperature, and sometimes the temperature below the set temperature is normal. When the measured temperature is close to or is the set temperature, wait for 1~2h and then the studio enters the constant temperature state, 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 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 string a “drying/filter†between the drying box and the vacuum pump.
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.