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An oven is an electrical appliance that uses a heating element to generate heat, commonly used for baking, drying, and thermal treatment. It operates within a temperature range of 5 to 300°C (some models can go up to 200°C higher), with a typical temperature sensitivity of ±1°C. Although there are various models available, the basic structure remains similar, typically consisting of three main components: the chamber, the heating system, and the automatic temperature control system.
To ensure safe and effective use, follow these guidelines:
1. Place the oven indoors in a dry and level area to avoid vibrations and exposure to corrosive substances.
2. Ensure proper electrical safety by installing a power switch with sufficient capacity based on the oven’s power requirements. Use appropriate cables and make sure the grounding wire is properly connected.
3. For ovens equipped with an electric contact mercury thermometer thermostat, connect the two wires from the thermometer to the corresponding terminals at the top of the unit. Insert a standard mercury thermometer into the exhaust valve to monitor the actual internal temperature. Open the exhaust valve and adjust the electric contact thermometer to the desired temperature, then secure the cap with screws. Be careful not to move the indicator beyond the scale during adjustment.
4. Once everything is set, place your sample inside the oven, then turn on the power. The red light will indicate that heating has started. When the target temperature is reached, the red light will turn off and the green light will come on, signaling that the oven is maintaining the set temperature. Always keep an eye on it to prevent any temperature control issues.
5. Arrange the samples carefully so they are not too crowded. Avoid placing items directly on heat sinks, as this may interfere with the circulation of hot air. Never bake flammable, explosive, volatile, or corrosive materials inside the oven.
6. If you need to observe the sample, open the outer door and look through the glass window. However, minimize the number of times you open the door to maintain stable temperature. Especially when operating above 200°C, opening the door could cause the glass to cool rapidly and potentially crack.
7. For ovens with a blower, make sure to turn it on during both heating and constant temperature phases. Failure to do so may lead to uneven temperature distribution and damage the heating elements.
8. After completing your work, always disconnect the power supply to ensure safety.
9. Keep the interior and exterior of the oven clean and free from dust or residue.
10. Never exceed the maximum operating temperature specified for the oven.
11. To avoid burns, always use appropriate tools when handling samples, especially when working with high temperatures.
Following these steps ensures the safe and efficient operation of your oven, extending its lifespan and improving the quality of your results.
Oven introduction and summary of its use