How to operate after vacuum adjustment of vacuum drying oven
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2) Connect the vacuum drying box exhaust pipe (outer diameter: Φ16mm) and the vacuum pump (2XZ-2 type, air inlet outer diameter Φ16mm) firmly with the vacuum fitting pipe (inner diameter: Φ16mm wall thickness: 10mm) (DZF-6090 and DZF-6210 is 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. (DZF-6090 and DZF-6210 type vacuumless valve The vacuum pump power supply on the panel can be directly turned off. At this time, the inside of the box is in a vacuum state.
After the vacuum degree of the vacuum drying oven is adjusted, the following operations can be performed:
1. Turn on the vacuum oven power supply. At this time, the power indicator light should be on (DZF-6090 and DZF-6210 should be turned on separately.) The temperature controller is powered on and self-test. The PV screen displays the temperature in the working room. SV screen The temperature set at the factory is displayed. The AT and HEAT lights on the temperature controller should be on, indicating that the instrument enters the warm working state.
Second, 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 (DZF-6090 and DZF-6210 type 2 and 3 The meters should be individually modified, 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.
3. When the temperature in the working chamber is close to the set temperature, the HEAT light will be bright 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 measurement is 1~2h, the studio enters a constant temperature state, and the item enters the drying stage.
4. When the required temperature is low, the secondary setting mode can be used. For example, the required working temperature is 70 °C, the first time is set to 60 °C, the temperature overshoot starts to fall back, and the second time is set to 70 °C. This can reduce or even eliminate the temperature overshoot phenomenon and enter the constant temperature state as soon as possible.
5. 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 and then 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 vacuum drying oven and the vacuum pump.
5. If inert gas such as nitrogen is required in the process of drying the articles, it should be noted in the contract that an intake valve is added.