DC 12V W1209 LED Digital Thermostat Temperature Control Meter

• Wide temperature control range: -50 to 110(-58-230); High accuracy: 0.1.
• With a waterproof sensitive NTC (10K 0.5%) sensor probe as the measuring input.
• Digital LED Tubes: "LLL" indicates sensor open, "HHH" indicates over range, the relay will be forcibly disconnected;
• The controller automatically performs the relay ON/OFF.
• Output: 1 relay output, 5A 250VAC, 20A 16VAC, meet a variety of high-power loads.
• Embedded central processor chip (MCU), smarter, lower power consumption,
• stable performance, good consistency, power-off setting automatic memory (MCU built-in EEPROM storage unit)

Specifications:

• Control accuracy: 0.1
• Hysteresis accuracy: 0.1 C
• Refresh rate: 0.5 S
• Display type: 0.28 inch three digital tube
• Input power: DC 12V
• Measurement input: NTC (10K 0.5%) Waterproof sensor Line length 300mm
• Output: 1 relay output, 5A 250VAC, 20A 16VAC
• Environmental requirements: -10~60C Humidity 20%-85%
• Power consumption of the whole machine: quiescent current: 10MA Pull-in current: 65MA
• Dimensions:1.87X0.73X1.24 inch.

Instructions

Connect the power supply and equipment to supply power to the thermostat, which is displayed as measuring temperature.
Click the SET button, the display temperature will flash, press +- to set the desired temperature (press +- to raise quickly and lower).
After the setting is completed, click SET to confirm the return. At this time, the thermostat automatically performs the relay on/off according to the setting!

Indicator and digital tube status:

Indicator and digital tube status description
Indicator light: The yellow indicator light is always on, indicating that the relay is closed.
Digital tube: Display LLL is the sensor open circuit, please connect the sensor according to the instructions;
If the HHH is out of the measurement range, the thermostat will force the relay to open.
Press and hold SET for 5 seconds to enter the main menu settings, and press +- to switch P0...P5.
Press and hold SET for 5 seconds without the button action. The thermostat automatically confirms the return.

P0 Cooling and heating mode (factory is cooling mode):

Press and hold SET for 5 seconds to display P0, press SET to set the working mode, press +- to switch [H is heating mode] [C is cooling mode] Click SET to return.
Long press SET or 5 seconds without key action The thermostat automatically confirms completion.

In the cooling mode: when the temperature measurement value temperature set point + hysteresis, the refrigeration relay is closed and the refrigerator is started; when the temperature measurement value is temperature set point, the refrigeration relay is disconnected and the refrigerator are closed.
In heating mode: When the temperature measurement value temperature set point - hysteresis, the heating relay pulls in and the heater start; when the temperature measurement value temperature set point, the heating relay is turned off and the heater is turned off.

P1 hysteresis setting (factory value 2 C):

Press and hold SET for 5 seconds to display P0, press +- to switch to P1, press SET to set the difference back, press +- to set the difference to 0.1-15, press SET to return when finished, long press SET or 5 seconds without button The motion thermostat automatically confirms the completion.

In the cooling mode: when the temperature measurement value the set value + the return value, the relay is closed, and the refrigerator is started; when the temperature measurement value is the set value, the relay is turned off and the refrigerator is turned off.

For example, the environment is 30 C, the set value is 25 C, and the hysteresis is set to 2 C. After the power is turned on, the relay closes the refrigerator to start. When the cooling reaches the set value of 25 C, the relay turns off the fridge and closes. The temperature has started to rise and temperature has started to rise. When the temperature rises to 27 C, the relay closes the refrigerator again, so the repeated cycle control temperature is not higher than 25 C + 2 C.

In heating mode: When the temperature measurement value set value - return difference, the relay is closed and the heater is started; when the temperature measurement value is set value, the relay is turned off and the heater is turned off.

For example, if the environment is 10 C, the set value is 25 C, and the hysteresis is set to 2 C. After the power is turned on, the relay closes the heater to start. When it is heated to 25 C, the relay turns off the heater and the heater is turned off. The temperature begins to decrease. When it drops to the set value of 23 C, the relay closes the heater to start again, so the repeated cycle control temperature is not lower than 25 C - 2 C.

P2 upper temperature setting upper limit (factory value 110 C):

In order to avoid the danger of setting the temperature too high due to the miss operation of others, the thermostat has the highest setting upper limit function, which limits the setting range of the highest temperature set point controlled by the thermostat.

Press and hold SET for 5 seconds to display P0, press +- to switch to P2, press SET to set the upper limit, press +- to set the highest settable temperature, the maximum value is 110, and press SET to return after finishing, press SET or 5 The second time without the button action thermostat automatically confirms the completion.

For example: set to 60 temperature set point can only be set to 60 C. If the temperature set point is to be expanded, the upper limit set value needs to be ...