Precautions for the use of the hottest oven

Precautions for the use of the oven

the oven is a device that uses the electric heating wire interlayer to heat and dry objects. It is suitable for baking, drying and heat treatment in the range of 5~300 ℃ (some 200 ℃) higher than room temperature, and the sensitivity is usually 1 ℃. It has many models, but its basic structure is similar. It is generally composed of three parts: box, electric heating system, setting multiple experimental parameters and automatic temperature control system. Its use and general experimental space will not be less than 900mm, so the larger precautions are summarized as follows:

1 The oven shall be placed in a dry and horizontal place indoors to prevent vibration and corrosion

2. Note that compared with other operation links in industrial and agricultural production, it is necessary to use electricity safely, and install power switches with sufficient capacity according to the power consumption of the oven. Select enough power conductors and have good grounding wires

3. For the oven with electric contact mercury thermometer temperature controller, the two wires of the electric contact thermometer should be connected to the two terminals on the top of the oven respectively. Insert an ordinary mercury thermometer into the exhaust valve (the thermometer in the exhaust valve is used to calibrate the electric contact mercury thermometer and observe the actual temperature in the box) and open the hole of the exhaust valve. Adjust the electric contact mercury thermometer to the required temperature and tighten the screws on the steel cap to achieve the purpose of constant temperature. However, it must be noted that the indicator iron must not be turned outside the scale during adjustment

4. When all preparations are ready, the test object can be put into the oven, and then connect and turn on the power supply. The red indicator light is on, indicating that the oven has been heated. When the temperature reaches the controlled temperature, the red light goes out and the green light goes on, and the constant temperature starts. In order to prevent temperature control failure, we must also take care of it

5. When placing the test object, it should be noted that the arrangement should not be too dense. The test object should not be placed on the heat dissipation plate to avoid affecting the upward flow of hot gas. It is forbidden to bake inflammable, explosive, volatile and corrosive items

6. When you need to observe the samples in the studio, you can open the door of the outer channel box and observe through the glass door. However, it is better to keep the door open as little as possible to avoid affecting the constant temperature. Especially when working above 200 ℃, opening the door may cause the glass door to suddenly cool and crack

7. For the oven with air blast, the blower must be turned on in the process of heating and constant temperature, otherwise it will affect the uniformity of the working room temperature and damage the heating elements

8. Cut off the power supply in time after work to ensure safety

9. Keep the inside and outside of the oven clean

10. When using, the temperature should not exceed the maximum operating temperature of the oven. No surgical removal is required

11 To prevent scalding, special tools should be used when taking and placing the test article