What needs to be installed on the digital thermometer to achieve automatic temperature control

This is an electronic machine for environmental detection, it is also called a digital temperature and humidity controller, one temperature control, one humidity control. It can accurately monitor the temperature and humidity of the measured environment in real time. The ambient temperature and humidity indicators meet the working requirements, and can effectively prevent condensation.

Its display description is as follows:

Power-on reset, the power-on reset process will have 2 seconds to display the current controller temperature control mode, there are two settings: heating up type and fan cooling type.

The upper screen displays "u" indicates that it is currently heating up, and the upper screen shows "d" indicating that it is currently cooling.

The lower screen shows "U", which indicates that the current setting is set to humidification. The lower screen shows "d", which indicates that the current setting is dehumidifying. The factory default value is heating up type.

Setting instructions: Press and hold the function selection button and the increase key during the power-on reset, so that the temperature working state can be selected; Press and hold the function selection key and the reduction button to select the humidity working state.

There are generally two installation methods: flush mounting: make 45 45mm holes in the mounting panel and fix the controller on the panel with the mounting bracket. Pedestal mounting: Clamp the 8-pin relay socket on the 35mm mounting rail or screw it to the mounting plate.

I have a K-type thermocouple and an XMT121 thermostat that control the solenoid valve to control the heating steam, but this thermostat doesn't seem to be able to achieve temperature range control, and can only control one of the upper or lower limits. I don't know if it's because of the wrong wiring, or if this thermostat doesn't have this function.

The digital display temperature controller is generally a digital tube or liquid crystal to display the temperature value of the measured object, and can set the maximum temperature and minimum temperature!

The digital display temperature controller is an instrument used to measure the temperature of various liquids, gases and vapors, and convert the temperature signal into an electrical signal for automatic control and safety protection. Low-power, high-precision RTD sensors are used; The circuit structure adopts high-performance monolithic microprocessor and digital display technology, as well as a human-machine interface with a pressure-sensitive switch input. It has the characteristics of wide range, strong anti-interference ability and good sealing performance.

The temperature value and setting parameters are displayed digitally, and automatic measurement and control can be realized without the need for a secondary instrument.

Inch high-brightness digital display with light filter function in the watch; The combination of control types of control limit A and B can be selected (double upper limit type, upper and lower limit type, double lower limit type); The control limit can be easily set arbitrarily in the full scale range; The output contacts of control limit A and B are normally open, and both have output status indication; The installation dimensions and joint threads are compatible with mechanical contact temperature instruments.

You're too simple about semiconductor cooling. If only to ask the question of PID control. It can be solved with the temperature control meter of Xiamen Yudian, the CF parameter is used to switch the direction of action of the control, the heating is a reaction adjustment, the input increases, and the output becomes smaller.

Refrigeration is a positive effect to regulate the increase of input and increase of output. Any adjustment meter of Xiamen Yudian can solve your problem. However, the semiconductor refrigeration sheet is hot on one side and cold on the other, and it is relatively thin, and it is difficult to do a good job of external insulation of your box.

You're not going to be doing CPU cooling, right?

This is so easy ... The quadratic meter has three sets of lines. One group is the secondary meter power supply, and the other group is the thermal resistance signal input.

And then there's temperature control... In this case, because the temperature is required to be high to a certain value to cool down, the temperature is controlled and alarmed. The high alarm terminal is connected to a solid state relay.

The solid state relay is then connected to the power supply and the semiconductor cooling pad. To set the target temperature. It is only necessary to set the height alarm on the secondary meter"ah"The temperature value is on the line to the quadratic table setting, and the manual of the table has.

The 26th floor is right, the control can be used XMT-102 or XMT-122SZ digital temperature display regulator, the probe can be used PT100 RTD range -50-+50, WZP series, XMT102 index number is also PT100, use the temperature display regulator to control the AC contactor to drive the semiconductor refrigeration sheet. The room temperature is 30 degrees, no need to adjust, and the refrigerator is the same.

1 Measuring range: 0 200

2 Conditions of use: Operating temperature: 10 +55

Relative humidity: 95% (25).

Power supply: AC220V 10%, AC380V 10%; 50hz

3 Resolution:

4 Temperature measurement accuracy: level, control error: 1

5. Display mode: 1-digit phase display, 3-digit half-temperature value display.

6. Relay contact output: single-phase fan 10A*250V three-phase fan 10A*380V Other signals 3 A*220V

7 Sensor: PT100 platinum resistance (3-25mm).

8. Maximum power consumption: 5W for the molded case; The iron shell is 8 w

9 Product weight: 1kg for the molded case; The iron shell is 5kg

10 Dimensions:

The plastic shell is: width, height, length = 160mm 80mm 145mm

The iron shell is: width, height, length = 200mm 250mm 100mm

11. Plastic case opening size: width and height = 153mm 77mm

12 Analog current output: 4 20mA (linear correspondence 0.)

13. Communication interface: generally using RS-485 communication mode, which can connect 30 thermostats, and the communication distance can reach 1200m

14. Passed anti-interference test items: common mode interference, serial mode interference, electrical fast transient, electrostatic interference, space radio frequency interference.

15. Withstand voltage test: AC2500V 50 Hz 60s.

The ambient temperature is automatically sampled and monitored in real time through the temperature sensor, and the control circuit is started when the ambient temperature is higher than the control set value, and the control differential can be set. If the temperature is still rising, when it rises to the set overrun alarm temperature point, the overrun alarm function will be activated. When the controlled temperature can not be effectively controlled, in order to prevent the destruction of the equipment, the equipment can also be stopped by the function of tripping to continue operation.

Beijing Saidheng power regulator specializes in the design, development and production of thyristor power regulators, voltage regulators and power regulators, which are widely used in various electric heating temperature control equipment.

1.High temperature control accuracy: 1. Simple and convenient operation.

2.Full-scale universal input for a wide range of temperature sensors.

3.The output voltage and current display are intuitive and convenient.

4.Single-point temperature control or 50-step programmable curve temperature control5Built-in alarm buzzer, automatic sound when over-temperature.

6.Optional Win-CT software for the temperature control system7Powerful communication function and easy remote control.

Company**:

If you have bit control, you can choose NHR-1103 economy, ** very discounted.

The temperature controller can only act near the set temperature, that is, when the set temperature is reached, the control line is cut off, and the control line is turned on when the set temperature is lower.

Described upper and lower limit temperature action function, can only adopt 2 temperature control tables to realize upper and lower limit temperature automatic control, and the following figure is that electric heater adopts 2 temperature control tables to realize upper and lower limit temperature automatic control circuit, can be modified for reference.

Go buy a temperature controller, it is estimated that your accuracy is not high, just choose a position difference control, the price is generally more than 200, good brands can not be bought, depending on your budget, in fact, the difference control is about the same.

Depending on the place of use, I recommend:

1.The PT100 temperature controller using the electric heater can achieve automatic heating stop.

Relatively safe and long service life.

2.The use of steam heating, the use of pneumatic valves and solenoid valves, temperature controllers and PT100 as long as the temperature controller can be used, the key is that the temperature controller parameter setting and temperature bar material basically use PT100

Play control-by-wire Nothing is unattainable.

Do you need accurate temperature control, the accuracy is not high, a thermistor solves the problem.

The control solenoid valve is connected to the normally closed point of the relay, the first alarm point SP1 is 80, the return difference is 20 for P1H, and the report ** type is the upper limit alarm P1C is 31, this temperature controller can do the function you said, and this model of temperature controller is very similar to the products I made in my company.

If this is the product I made, this thermostat is pt100 input signal, b password is 655, can be adjusted to thermocouple input thermostat, enter b menu in to change to 00, 00 is k type thermocouple input. Except for the 96 48 meter, the thermocouple is connected to the terminal of the instrument, 1 is negative, 2 is positive. The current room temperature can be seen after the 1 and 2 pins are shorted.

If it's not for this password, it can't. It can be replaced with a PT100 sensor or an XMT-610111 meter.

I am Dalian Meitiansanyou electronic instrument ****, responsible for digital display instrument.

Features:

Intelligent stepless temperature control, two-way temperature control.

The temperature control accuracy is:

The operating temperature can be set arbitrarily (usually between -40 100, other ranges can be customized).

Alarm when the operating temperature exceeds the upper limit and lower limit (set by software) The user can modify the temperature PID feedback parameters.

Constant temperature mode: two-way hot and cold constant temperature.

It has protection against over-current, over-voltage, over-temperature, etc.

It has hardware over-temperature, under-temperature and other protection circuits.

High stability, high anti-interference, completely eliminate 50 60hz power frequency interference in the temperature sampling channel Touch screen control interface.

Friendly man-machine interface and fault diagnosis function (in case of improper operation or power failure, the power supply will give a fault number prompt).

Module size: W l h 450 300 133mm At the same time, a variety of temperature control module products are available.

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Galanz Electric Oven (Top 10 Electric Oven Brands, Galanz) 2: ACA Electric Oven (Top 10 Electric Oven Brands, ACA) 3: Changdi Electric Oven (Top 10 Electric Oven Brands, Weida Electric Appliance Industry****) 4:

Midea Electric Oven (Top 10 Electric Oven Brands, Midea Refrigeration Group) 5: Dongling Electric Oven (Top 10 Electric Oven Brands, Guangdong Xinbao Electric) 6: Westinghouse Electric Oven (Top 10 Electric Oven Brands, Westinghouse) 7:

Hui Home Appliance Oven (Top 10 Electric Oven Brands, Huijia) 8: Electrolux Electric Oven (Top 10 Electric Oven Brands, Electrolux) 9: Sanyo Electric Oven (Top 10 Electric Oven Brands, Sanyo Household Appliances****) 10:

Duckling electric oven (top ten electric oven brands, duckling) many people know the oven, the oven has now become an indispensable part of most families, it uses the radiant heat of the electric heating element to bake the color and flavor of the food, it brings people a new taste of life, so we should have an understanding of the oven purchase, not long ago I also bought a new bake, I feel good in all aspects, can bake a variety of delicious food, and the operation is simple, easy to understand, Even my elderly mother has learned, I can be lazy in the future, waiting to eat delicious, you can go to the place to see, **is pretty good, economical and affordable!

Technical parameters of electric oven: temperature range room temperature -200 (300), temperature stability 05. Uniformity of temperature distribution 2. Heating time 200 about 50min, power supply 3 380VAC 10% or 2 220VAC 10%, temperature gauge Japanese famous factory "SHTIMADEN" PID with SSR output, fan delay power-off function (program control can be purchased separately), time meter 999 hours jumping word display, safety device The first over-temperature alarm, the second over-temperature power cut-off function, MCCB overload protection, temperature self-tuning, electric heating Fin heat dissipation tubular electric heating pipe, Air transport system forced air supply circulation system and specially designed air outlet, excellent temperature distribution uniformity, p exhaust flue blade design can adjust the air volume, control the formation of the temperature when the temperature reaches the set temperature, automatically open the time meter, cut off the heating power supply after the time arrives, and buzz prompt.

When the oven is not in use, the knobs should be set to the OFF setting.

40 can be used to leaven dough and yogurt in place of warm water and quilts.

50. You can dehydrate the food and make all kinds of dried fruits, dried vegetables, and dried meat for easy preservation, and open the oven door slightly when drying to facilitate the dissipation of moisture. 60, which can be used to make sausages and bacon.

In the production of enterprises in various industries, there are many industrial ovens that are used, and the following is a representative description of an industrial oven:

AHS-560 Industrial Oven.

Studio size (height*width*depth): 100*80*70cm Working temperature: room temperature 5-200

Features:1The outer shell is made of cold-rolled steel and the outer surface is painted with light gray paint.

2.The stainless steel plate of the inner tank and air duct system is clean and durable, and there is no deformation at high temperature.

3.Rock wool insulation. Good thermal insulation performance.

Digital temperature controller, button setting, automatic temperature control.

5.Constant temperature timing function, automatically cut off the heating when the work is completed, and beep to indicate the end of the work.

6.Over-temperature protection function.

7.Double air duct, forced circulation air supply, uniform temperature.

8.Short circuit, overload protection, motor thermal overload, phase loss protection.

9.Stainless steel tubular electric heater for long service life.

10.Heating power:

11.Top heat.

12.There are 6 layers of shelves in the box, and 3 shelves are generally configured.

13.High temperature resistant wind turbine.

14.Voltage: 380V 50Hz