An oven is a device that uses electric heating elements to dry objects by heating them in a controlled environment. It is suitable for baking, drying, and heat treatment within a temperature range of 5°C to 300°C (or up to 200°C in some models) above room temperature, with a typical sensitivity of ±1°C. There are many models of ovens, but their basic structures are similar, generally consisting of three parts: the chamber, the heating system, and the automatic temperature control system.
The following are the key points and precautions for using an oven:
Ⅰ. Installation: The oven should be placed in a dry and level area indoors, away from vibrations and corrosive substances.
Ⅱ. Electrical Safety: Ensure safe electrical usage by installing a power switch with sufficient capacity according to the oven's power consumption. Use adequate power cables and ensure a proper grounding connection.
Ⅲ. Temperature Control: For ovens equipped with a mercury contact thermometer-type temperature controller, connect the two leads of the contact thermometer to the two terminals on the top of the oven. Insert a standard mercury thermometer into the vent valve (this thermometer is used to calibrate the contact thermometer and monitor the actual temperature inside the chamber). Open the vent hole and adjust the contact thermometer to the desired temperature, then tighten the screw on the cap to maintain a constant temperature. Be careful not to rotate the indicator beyond the scale during adjustment.
Ⅳ. Preparation and Operation: After all preparations are complete, place the samples inside the oven, connect the power supply, and turn it on. The red indicator light will illuminate, indicating that the chamber is heating up. When the temperature reaches the set point, the red light will turn off and the green light will turn on, indicating that the oven has entered the constant temperature phase. However, it is still necessary to monitor the oven to prevent temperature control failure.
Ⅴ. Sample Placement: When placing samples, ensure they are not too densely packed. Do not place samples on the heat dissipation plate, as this may obstruct the upward flow of hot air. Avoid baking flammable, explosive, volatile, or corrosive substances.
Ⅵ. Observation: To observe the samples inside the chamber, open the outer door and look through the glass door. However, minimize the frequency of opening the door to avoid affecting the constant temperature. Especially when working at temperatures above 200°C, opening the door may cause the glass to crack due to sudden cooling.
Ⅶ. Ventilation: For ovens with a fan, ensure the fan is turned on during both the heating and constant temperature phases. Failure to do so may result in uneven temperature distribution within the chamber and damage to the heating elements.
Ⅷ. Shutdown: After use, promptly turn off the power supply to ensure safety.
Ⅸ. Cleanliness: Keep the interior and exterior of the oven clean.
Ⅹ. Temperature Limit: Do not exceed the maximum operating temperature of the oven.
XI. Safety Measures: Use specialized tools to handle samples to prevent burns.
Additional Notes:
1.Regular Maintenance: Periodically inspect the oven's heating elements, temperature sensors, and control systems to ensure they are functioning correctly.
2.Calibration: Regularly calibrate the temperature control system to maintain accuracy.
3.Ventilation: Ensure the studio has adequate ventilation to prevent the buildup of heat and fumes.
4.Emergency Procedures: Familiarize yourself with emergency shutdown procedures and keep a fire extinguisher nearby in case of accidents.
By adhering to these guidelines, you can ensure the safe and effective use of an oven in your studio.
