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Series 174.1 thermostats can be used to create home incubators using incandescent lamps as heating elements.
The minimum set of parts makes the device not only inexpensive, but also provides high reliability. The presence of two separate regulators allows you to set the required temperature with an accuracy of 0.1°C.
In an isolated volume, it is enough to set the device once using an accurate external thermometer and it will maintain the set temperature when the ambient temperature changes.
The model is presented in the form of kits for self-assembly K174.1 and ready-made modules M174.1.
Schematic diagram:
The device is powered by AC power. The key element of the circuit is the controlled zener diode D7, which compares its internal reference voltage and the voltage of the divider R3R4R5R6, and outputs an error signal to the triac VS1, which switches the load. The temperature sensor is the thermistor R6. The temperature is regulated by potentiometers R5 E smooth) and R4 E coarse). The D3 LED indicates that the heater is on. The D3 LED indicates that the heater is on.
Layout of components:
Recommendations for use
The power of the device can be increased by using a radiator on the triac VS1.
The device is intended for use in the ~220V network, you should be careful when working with the included module and use the case to install the module
thermostat.
Wires from the ~ 220V network are soldered to contact pads X1, and wires to the heating element are soldered to pads X2.
The printed circuit board of the module has two fixing holes for mounting. The module operation mode is indicated by the LED.
The temperature sensor can be removed using an insulated double-insulated wire, since the device is not galvanically isolated. It is desirable to isolate the sensor itself with a heat shrink tube.
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The data presented in the product description are for reference only and may differ from those indicated by the manufacturer.
To carry out technical calculations and obtain the exact parameters of the goods, use the datasheets from the manufacturer's website.
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The data presented in the product description are for reference only and may differ from those indicated by the manufacturer.
