1. Sudden jump thermostat
The type of various sudden jump thermostats is generally called KSD, such as KSD301, KSD302, etc., the thermostat is a new type of bimetal thermostat, mainly as a variety of electric heating products with overheat protection, generally used in series with thermal fuses, and the sudden jump thermostat is used as a level of protection. The thermal fuse is used as a secondary protection to effectively prevent the burning of the electric heating element and the resulting fire accident when the electric heating element is overheated due to the loss or failure of the sudden jump thermostat.
2. Liquid expansion thermostat
It is a physical phenomenon (volume change) in which the material (usually liquid) in the temperature sensing part of the thermostat is changed when the temperature of the controlled target is changed, and the membrane box connected with the temperature sensing part expands or shortens. With the principle of lever, the switch is driven to switch on and off, and the liquid expansion temperature control to reach the constant temperature target has the functional characteristics of accurate temperature control, stable and reliable, small temperature difference between start and stop, large control temperature control and adjustment range, and large overload current. Liquid expansion thermostats are mainly used in temperature control occasions such as home appliance industry, electric heating equipment, and refrigeration industry.
3. Pressure thermostat
The thermostat transforms the change of the controlled temperature into the change of space pressure or volume through the temperature package and capillary tube of the enclosed temperature-sensing working fluid, and when the temperature set value is reached, the contact is automatically closed through the elastic element and the fast instantaneous organization, so as to achieve the purpose of automatic temperature control. It consists of three parts: a temperature sensing part, a temperature setting body, a micro switch for opening and closing, and an automatic damper. Pressurized thermostats are suitable for refrigeration appliances (e.g. refrigerators, freezers, etc.) and heating appliances.
4. Electronic thermostat
The electronic temperature controller (resistance type) is measured by using the method of resistance temperature sensing, and generally uses platinum wire, copper wire, tungsten wire and thermistor as the temperature measurement resistor, which has its own advantages and accuracy. Generally, most household air conditioners use thermistor type.
5. Digital thermostat
The digital electronic temperature controller is an accurate temperature sensing controller that can digitally quantify the temperature. The principle of the thermostat is that the NTC thermal sensor or thermocouple is planned into the corresponding circuit, and the NTC thermal sensor or thermocouple is changed with the temperature change, and the corresponding voltage and current change will be generated, and then the changed voltage and current will be detected, quantified and displayed through the microcontroller, and the corresponding control will be done. Digital temperature control has the characteristics of high accuracy, good sensitivity, intuitiveness, and convenient operation.
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Difference Between Thermocouple and RTD
In temperature measurement, thermocouples and RTDs are both contact temperature measurements, and although they both measure the temperature of an object, their principles and characteristics are different.
This article first introduces thermocouples, which are widely used in temperature measurement temperature control devices.
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Precautions for the use of RKC thermostats
fold
When the RKC thermostat comes out, it is a single-loop regulator, that is, it only has a heating function, which is called the basic meter, which is generally sent to the agent, and the agent will expand the multi-channel adjustment and alarm output control function, which is called "changing the meter" in the industry, so as to ensure that there is very little hardware cost.
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RLC Thermostat – The reason why the temperature control meter shows HHH
The reasons why the temperature control table shows HHH are as follows:
1. The thermocouple signal line is reversed, or short.
2. If the temperature control meter is in normal use before, it is recommended to check whether the signal line of the thermocouple is broken.
3. The wire inside the thermocouple is broken.
4 ...
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What are the characteristics of RLC thermostats – mechanical thermostats?
1. Used to control fan coil unit, electric valve, damper and other equipment;
2. The switch adopts toggle type, which feels comfortable and has a long life;
3. Set the temperature by twisting (the temperature range can be limited);
4. The thermostat can be installed directly on the wall or on the standard junction box;
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Specifications and models of RLC thermostats
CH102 (48×48×100mm)
CH402 (48×96×100mm)
CH902 (96×96×100mm)
1. RH400 size: 48*96, depth 60, about 250g
1. Thermocouples: K, J, R, S, B, E, N, T, W5RE/W6RE, PL‖, U, L
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RKC Level Gauge – The correct maintenance method for float level gauges
(1) After 6 months to 1 year of operation, the sensor should be visually inspected and routinely calibrated.
(2) Regularly check whether the sensor is bent and deformed by external force to avoid ball jamming.
(3) Regularly check whether the magnetic induction switch element of the sensor is aging and failing, ...
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RKC Thermostat – What are the common faults of thermostats?
1. There is no manifestation when the power is on. For this kind of problem, first confirm whether the power supply is there and whether the power supply matches the power supply required by the thermostat, and then check whether the wiring is strong. The problem is still there, then it is the problem of the thermostat itself.
2. There is a manifestation, and the manipulation makes mistakes. The first thing to look at this kind of problem is to look at the control ...
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Specifications and models of RKC thermostats
CH102 (48×48×100mm)
CH402 (48×96×100mm)
CH902 (96×96×100mm)
1. RH400 size: 48*96, depth 60, about 250g
1. Thermocouples: K, J, R, S, B, E, N, T, W5RE/W6RE, PL‖, U, L
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RRKC thermostat – the correct way to set up the thermostat
Press the SET button to set or view the temperature set point, press the SET key digital tube characters to start flashing, indicating that the instrument has entered the setting state, press the △ key to increase the set value, press the ▽ key to decrease the set value, press and hold the △ key or ▽ key The data will change rapidly, press the SET key again The instrument returns to normal working condition ...
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Key features of the RLC thermostat:
Thermocouples, RTDs, analog and other signals are freely inputted, and the range can be set freely;
The software zeros the full degree, the cold end measures the temperature separately, the amplifier is self-stabilizing, and the display accuracy is better than 0.5%FS;
Fuzzy theory combined with traditional PD method, fast and stable control, advanced tuning ...
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RK Thermostat - Part of the LCD shows the status quo of floor heating thermostats
1) The LCD interface is too large or the display symbols are not proportional or standard.
2) The terminal blocks or circuits (components) that control the output cannot withstand large currents.
3) The cable of the external sensor (ground probe) is a thin and flexible wire, which cannot be inserted into the embedded pipe, and it is also a hidden danger for future maintenance.
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RLC thermostat – how to install the thermostat
1. In which room should the thermostat be installed?
It is very important to choose a reasonable location to install the thermostat, which will directly affect the work of the wall-hung furnace in your home, the main living room (living room) should be your best choice, you can also install the thermostat in the bedroom according to your personal needs.
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Features and technical specifications of RKG thermostats
peculiarity
1. Thermocouple, RTD, analog and other signals are freely input, and the range can be set freely.
2. The software adjusts the full degree, the cold end measures the temperature separately, the amplifier is self-stabilizing, and the display accuracy is better than 0.5%FS.
3. Fuzzy theory combined with traditional PID method, fast control ...
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RKC converter – the control strategy of the converter
Direct transformation method
The direct conversion method is to synthesize the "output voltage" through the continuous chopping of the input voltage, which can be divided into coordinate transformation method, harmonic injection method, equivalent conductivity method and scalar method, although all these methods have certain advantages, but also have certain problems, ...
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What problems are easy to encounter in the use of RKCPT100 temperature sensor probes?
What problems are easy to encounter in the use of PT100 temperature sensor probes?
1. Is the output signal unstable?
A: Maybe it's the temperature instability of the temperature source itself, or the problem of on-site disturbance.
2. Is there a big error in the output of the transmitter?
Answer: This ...
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RLC thermostat - common faults and solutions of intelligent temperature controllers
1. Heating for a period of time, the temperature does not change. Displays the ambient temperature of the site at all times (e.g. room temperature 25°C)
In case of such failures, first check whether the SV value setting value is set, whether the instrument OUT indicator is lit, and whether the No. 3 and 4 terminals of the "multimeter" measuring instrument have 12VDC output.
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RRKC thermostat - common faults and solutions of stand-alone thermostats
Fault 1: The thermostat does not turn on (does not light up)
Analyze the causes
1. Wrong wiring
2. The voltage of the input terminal is not enough or the input terminal is damaged by empty opening and leakage
3. Whether the cable between the panel and the power board is broken or plugged incorrectly
4. Load short circuit or open circuit, probe ...
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What are the solutions to the failure of the RRKC thermostat - the sudden thermostat?
1. The cleanliness and finish of the contact surface have a great impact on the working condition of the contact. When the surface of the contact is rough or there is excess material on the contact, it is easy to cause arcing and reduce the life of the contact. Therefore, the parts cleaning process should be improved to eliminate excess materials; Increasing the process of screening excess materials, ...
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Where you need to pay attention to the wiring of the RRKC thermostat
1. For thermocouple input, the corresponding compensation wire should be used.
2. RTD input, 3 wires with low resistance and no difference should be used.
3. The input signal line should be far away from the power line of the instrument. Power supply and load lines to avoid noise interference.
4. Instrument power cord ...
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RKC Thermostat How to properly select and use a pressure sensor
High-temperature melt pressure sensors, transmitters, and high-temperature melt pressure gauges are special equipment in extrusion processing.
On the production line, melt pressure sensors play an important role in improving melt quality, increasing production safety and protecting production equipment.
Use...
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