You can use HYH series constant temperature and humidity test chamber to test the mechanical timer for oven.
1. Humidity and heat resistance test:
The mechanical timer for oven is placed under the environmental conditions of 40±2℃ and relative humidity of 90%~95%, and it is taken out after 48 hours of continuous storage. At room temperature, the surface is immediately wiped dry, and the measurement is completed within 3 minutes. Its performance should meet:
Insulation resistance should not be less than 10MΩ, withstand ac1500V (effective value), and the test voltage with a frequency of 50Hz lasts for 1 minute, and there should be no insulation breakdown and flashover.
2. High temperature test:
After placing the mechanical timer for oven in a high temperature box with a temperature of 120℃±5℃ for 1 hour, measure the running time error of the timer in the box.
3. Low temperature test:
Place the mechanical timer for oven in a low temperature box with a temperature of -15°C ± 5°C for 4 hours, then move it to room temperature to recover for not less than 1 hour, and measure its timing error. The timer should not be cracked, deformed, and the error should not exceed the specified value 2 times.
