How to control the internal temperature and humidity of the constant temperature and humidity test chamber? (1)

The constant temperature and humidity test chamber is placed under the specified temperature and humidity to see the product's high temperature resistance, low temperature resistance, and humidity resistance. Then the constant temperature and humidity machine has the functions of heating, cooling, humidifying and dehumidifying.
The temperature and humidity required for the test can control the operation of each component through the control instrument to meet the test requirements.
The heating device is the key link to control whether the constant temperature and humidity test chamber is warmed up; when the controller receives the heating command, it will output the voltage to the relay, about 3-12 volts DC is added to the solid state relay; its AC terminal is equivalent to the wire connection. The contactor also picks up at the same time, and there is voltage at both ends of the heater to cause it to heat up. The circulating fan drives the heat to the box, so that the constant temperature and humidity machine heats up, so that the temperature quickly reaches the value you set.
The controller of the constant temperature and humidity test chamber is adjusted by the on-off regulation of the solid state relay; we can adjust the heat output by looking at the heating output on the screen of the constant temperature and humidity test chamber; this is the temperature control above 89 degrees, when the test The situation when the temperature requirement is below 89 degrees is explained in detail in the next section.

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