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. Temperature control has heating control, and sometimes there are cases that require refrigeration, so they all control the temperature, but have completely opposite modes of action.
5. Generally, there are only two ways: positive action and reaction action.
6. The fluid medium temperature controller uses the principle of thermal expansion and contraction of temperature-sensing fluid and incompressibility of liquid to achieve automatic adjustment.
7. When the control temperature rises, the thrust generated by the expansion of the temperature-sensing liquid will turn off the heat medium to reduce the output temperature.
8. When the control temperature decreases, the temperature sensing liquid shrinks, and the heat medium is enlarged under the action of the reset device to increase the output temperature, so that the controlled temperature reaches and remains within the set temperature range.
9. Color temperature type thermostat, the working principle is to adopt the principle that some coatings will produce different colors at different temperatures.
10. For example, using liquid crystal at different temperatures can produce different colors, and then use a color collector such as a camera to provide different data to the circuit, so as to control the circuit.
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How to set the parameters of RKC thermostat CD901?
1. Lower limit deviation alarm setting: press the SET key to select and display "SLP", the green display screen displays the value of the parameter, and select the shift, increment, and decrement keys to set or modify the parameter. This parameter indicates the difference between the alarm point and the master setpoint.
2. The upper limit deviation alarm is set ...
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RKC thermostat – the correct way to adjust the thermostat
1. Set temperature: Press the SET button to set or view the temperature set point. Press the SET key digital tube character start flashing, indicating that the appearance 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 appearance will return ...
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RKC Level Gauge - Preservation and storage of float level gauges in daily use
1. To avoid damage to the instrument, pay attention to the correct protection method: in order to ensure the accuracy of the instrument and avoid damage to the instrument, try not to use the protection instrument of isolator or other isolation devices. If you have to do it, you should also pay attention to the careful selection, determine the isolation solution, and wash the isolation film correctly, ...
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RK thermostat - the problem that should be paid attention to in the installation of floor heating thermostat
1. Wall installation, the height is about 1.2 meters, generally on the same horizontal line as the electric lighting switch of the home.
2. Installed on a wall where the surrounding air flows freely, and is not affected by other heat sources (e.g. sunlight), air flow from doors and windows, or external wall temperature, etc.
3. Advance ...
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Precautions for the selection of RRKC thermostats
The following points should be paid attention to in the selection of intelligent thermostats:
(1) Dimensions (panel size, length)
(2) Enter the sensor graduation number (according to the matching sensor), display accuracy, and display resolution
(3) What is the main output (selected according to the controller)
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What should be paid attention to when installing RRKC thermostats - pop-up thermostats
1. The use environment of the sudden jump thermostat should avoid stains and moisture, otherwise it will affect the electrical performance of the product, and the thermostat must be used in a working environment with a relative humidity of ≤ 90% and no contact with corrosive and flammable mediums. For use in wet environments or submerged liquids, the thermostat ...
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RKC Level Gauge – Installation of a pontoon level gauge
When transporting and unpacking, it is necessary to avoid excessive shock and vibration;
The installation should be firm and reliable, and the pontoon should be installed vertically to prevent the pontoon from colliding with the interior wall of the pontoon;
When the pontoon is hooked, it should not swing or pull and compress sharply, so as not to damage the sensor and reduce the accuracy of the instrument;
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RRC thermostat - how to adjust the smart thermostat
1. Set temperature: Press the SET button to set or view the temperature set point. Press the SET button 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, long press the △ key or ▽ key The data will change rapidly, press the SET key again ...
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RHK thermostat - the use of electronic thermostat and its classification introduction
First, the use of electronic temperature controller
The electronic temperature controller (resistive type) is measured by the method of resistance temperature sensing, and generally uses platinum wire, copper wire, tungsten wire and semiconductor (thermistor, etc.) as the temperature measurement resistor, and these resistors have their own advantages and points. Home Air Conditioner ...
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RKC Level Gauge – How the level gauge works
Measuring principle with hydrostatic pressure:
When the level transmitter is placed at a certain depth in the liquid to be measured, the pressure on the welcome surface of the sensor is formulated as: Ρ = ρ .g.H + Po
where:
P: The pressure on the fluid surface of the transmitter
ρ: the density of the liquid to be measured
g ...
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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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RLC Thermostat - Overview and characteristics of mechanical thermostats
Mechanical thermostats are suitable for indoor temperature control in industrial, commercial and residential buildings. The mechanical thermostat uses an inflatable diaphragm box to sense the temperature and compare it with the user's set temperature to automatically control the air conditioning equipment to achieve the purpose of indoor constant temperature. For commercial, industrial and civil construction, available ...
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RKC level gauge - the fault and treatment method of float level gauge
Fault 1, the indication is abnormal
The float level gauge is not indicated properly and is a very common fault of the float level gauge. Usually there are the following manifestations:
Phenomenon 1: The float level gauge in the atmospheric pressure workshop has the largest indication.
Troubleshooting: The float was found to be ...
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Common faults and solutions of intelligent temperature controllers - RTC
Master the common problems of several common intelligent temperature controllers, and solve them by yourself when you encounter problems, and you don't need to spend time and effort to find someone to repair, the common problems are as follows:
1. Heating for a period of time, the temperature does not change. Ambient temperature (e.g., room temperature 25°C) is displayed at all times
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RLC thermostat – what you should pay attention to when maintaining your temperature controller
1. Do not wipe with acidic, alkaline and other corrosive liquids and water-containing rags when cleaning, so as not to damage the temperature controller and affect its normal use.
2. Do not decorate and cover the temperature controller. The thermostat has a built-in temperature sensor to sense the outside temperature. Therefore, Wen ...
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Wiring method of the RKG thermostat
Take CD901 as an example,
L(1) pin to 220 volt live wire,
N(2) pin 220 volt neutral wire,
3,4 pins for *** output,
5,6 pins for the second output,
7, 8, 9 pins are alarm output,
The rear three pins are connected to thermocouples or PT100 and so on.
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RRKC Thermostat – The solution to the failure of the jump thermostat switch
1. The cleanliness and finish of the contact surface have a great impact on the working state of the contact. When the appearance of the contact is rough or there is residue 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 the residues; Add the process of residue selection, ...
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Initialization parameter setting of the rkc thermostat
1. Press the ISET) button for 2 seconds to enter the parameter setting mode, press ISET until "LCK" is displayed, press the [] key to move the cursor to the thousands, and press the [] button to change the number of thousands from "0" to "1" to display "1000" to unlock.
2. Press the ISET button for 3 seconds to return to SV/PV display mode
3. Press [SET]+ ...
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What should I pay attention to when operating the RKC thermostat?
The instrument can be cleaned only after the power is off;
To remove stains from the monitor, use a soft cloth or cotton paper;
The display is easy to be scratched, and it is forbidden to use hard objects to operate the panel buttons, otherwise the keys will be damaged or scratched.
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RRC thermostat - the principle of sudden jump thermostat, how to judge the good or bad?
1. What is the principle of the sudden jump thermostat?
The sudden jump thermostat is a kind of thermostat, which is a series of automatic control elements that are physically deformed inside the switch according to the temperature change of the working environment, resulting in some special effects and on-off action. Sudden jump ...
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