Let's analyze the function of the buttons and the available settings and modes. Here I give you a drawing of what is drawn on the buttons and described in the instructions that came in the kit. And again it is in Chinese and English. The first button on the left with the bottom is designated as you probably guessed it already - on-off. I want to upset you: you are mistaken, as I was mistaken. This is a reset to factory settings. If you need to roll back the device to the initial settings - just hold this button for more than 5 seconds until the upper (green) readings flash.After that, all settings will be reset. Press the same button again in order to stop the readings. Then the only and main menu of the device consists of 4 items: P0-P3. In order to get to this menu it is necessary to press and hold the “S” button for more than 3 seconds until “P0” appears. The value of this item is displayed in the bottom line. It is necessary to move from point to point with the same “S” button, points will be turned around in a circle P0-P3. Use the up and down arrows to set the values you need. To exit the menu, press the reset button with the “on / off” icon, or wait for 5 seconds and only then the set values will take effect. Now let's consider what all the menu items mean:
Let's go through each item. P0 - our thermostat regulator has the ability to work as if it is burning, controlling say the heater. Including (closing) the relay contacts when the temperature drops below the set value (“H” mode). Either work on cooling by controlling, say, a cooler or a fan.Turning on (closing) the relay contacts when the temperature rises above a predetermined value (mode “C”). I will set the mode “H” for heating the room. P1 - maintain temperature. Set any value from -40 to +120. If the buttons with arrows are held for a long time, the readings themselves will begin to increase or decrease if you need to radically change the readings without pressing the buttons 150 times. I will set 29 degrees to demonstrate the instrument operation. P2 - Delay before switching on the load. As soon as the readings have reached the desired level, the time relay is triggered and, at the end, switches on the relay if the specified levels are in the response limit. If it is simpler to say, it happens that the temperature reaches 29 degrees, and after 2-3 minutes it drops again to 28, as a result of which a short-term switching of the load occurs, which may not really have a good effect. This is where the time relay can come in handy. I will set a zero. P3 - hysteresis or the difference between on and off temperatures. Initially, the factory settings are set at 0.5 degrees Celsius, which means that for the “H” mode, the load in my case will turn on when it reaches 28.5 degrees and turns off when it reaches 29 degrees. Initially, 0.5. I will leave it unchanged. I will connect the load. Turn on the thermometer.Since now the temperature is less than 29 degrees, the LED is on and the load is working, such as a heater. Now I am simulating the fact that the room has warmed up, and the load is turned off. Warmed up. Load off at 29 degrees. Leave to cool. The load switched on at 28.5 degrees. If the sensor reading exceeds the value of +120 degrees, the display will show "HHH". And if the temperature drops below - 40 degrees, the display will show “LLL”. The same readings can be highlighted when a sensor malfunctions or wire breaks to it. Here we looked at the thermostat in action. Now I will tell about the warning mentioned in the instructions: 1. The device can not be installed in places where water drips exceeded the humidity of 90%. The sensor itself is sealed and can be installed anywhere, but the device does not tolerate water and high humidity. 2. The temperature sensor wire should go separately from high-voltage wires. Since interference with the network can affect the readings of the device. 3. The thermostat controls mainly the energy-intensive load, so pay special attention to the reliability of the electrical connections: the thermostat with the network,regulator with a load. Let's go over the characteristics of this device:This is a great household temperature controller. I personally really liked it.
- Model: MH-2000
- Color: black
- Material: PC plastic.
- Operating voltage: 90 V 250 V
- Rated current: 10A.
- Power consumption: ≤ 3 W.
- Standby power consumption: ≤0. 5 W.
- Temperature control accuracy: 0.1 ° C.
- Resolution: 0.1 ° C.
- Measurement error: ± 0. 3 ° C.
- Regulation range: -40 120 ° C.
- Rotary temperature range: 0.1 30 ° C (adjustable).
- Operating temperature: -20 70 ° C.
- Operating humidity: 90% RH, non-condensing.
- Temperature sensor: NTC 25 degrees = 10 K B3435 ± 1% (1.48 m).
- Power wire length: 1.5 m.
- Sensor wire length: 1.5 m.
- relay:. 10A / 250V
- Size:. 155h60h28 mm
- Weight: 245.2 g
- Package size: 155х60х28.5 mm.
- Package weight: 317 g.
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