During the temperature detection process of a vacuum drying oven, there are several important points to consider in order to ensure accurate results and safe operation.
First, as the temperature inside the working chamber approaches the set value, the HEAT indicator light will flicker on and off, signaling that the system has entered the PID control phase. At this stage, the temperature readings may occasionally exceed the set point or drop slightly below it. Once the temperature stabilizes within the desired range—usually after 1 to 2 hours—the oven enters a constant temperature state, and the drying process can begin.
Second, if a high operating temperature is required, it’s advisable to use a two-step setting method. For example, if the target temperature is 100°C, first set the oven to 90°C and allow it to stabilize before increasing it to 100°C. This helps reduce or eliminate temperature overshoot and allows the system to reach a stable state more quickly. After completing the test, always check the power supply. If the temperature is still high, open the air release valve to return the vacuum level to zero. Wait for about 5 minutes before opening the door to avoid burns from residual heat.
Third, if the material being dried has a high moisture content, the resulting vapor may negatively impact the performance of the vacuum pump. To prevent this, it's recommended to install a "drying/filter" unit between the vacuum drying oven and the vacuum pump. This helps protect the pump and ensures smoother operation.
Fourth, if inert gas such as nitrogen is needed during the drying process, make sure this requirement is clearly stated in the contract so that an inlet valve can be installed accordingly.
By following these guidelines, users can optimize the performance of the vacuum drying oven, improve safety, and extend the lifespan of the equipment. Always refer to the manufacturer’s manual for specific instructions and maintenance procedures.
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