PT100 RTD is a platinum RTD, which can be regarded as a more commonly used thermometer in the range of medium and low temperatures, and it has a wide range of uses, including medical, electric, industrial production, thermometers and other high-precision thermometers. However, due to the wide range of use, sometimes some failures occur:
Fault phenomenon: the meter is displayed as a negative value;
It is likely that the wiring between the display and the PT100 RTD is wrong or that the PT100 RTD has a short circuit;
Disposal: Correct the wiring, or find out the short circuit, strengthen the insulation.
The fault phenomenon is shown as infinite :p the T100 RTD table;
Possible causes are: PT100 RTD or short circuit of the lead wire, loose terminal terminal, etc.;
Processing method: replace the resistor body, weld, tighten the screws, etc.
Fault phenomenon: the indication value of the PT100 RTD is lower than its actual value or the indication value is unstable;
Possible causes: Short circuit to protect metal chips, dust, dirt between binding posts and thermal resistance in the pipe;
Disposal: remove metal shavings, remove dust, water droplets, etc., and find out the short circuit point to strengthen the insulation.
Fault phenomenon :P T 100 RTD changes with temperature;
It is likely that it is due to the corrosion and deterioration of the :p T100 RTD wire material;
Solution: Replace the PT100 RTD.
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Common faults and solutions of RKC temperature controllers
1. The power indication is normal, but the temperature controller has no screen display. Most of this fault is caused by the heating of the voltage regulator element (7805 or 7812) on the thermostat during long-term use, which leads to the breakpoint of the solder joint, and sometimes it is caused by the phenomenon of virtual soldering at the factory, and the main re-soldering can be done.
2. Temperature controller ...
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RKC thermostat wiring needs to pay attention to
Wiring Notes:
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.
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RLC thermostat - temperature controller control method classification and working principle
1. The temperature controller control method is generally divided into two types:
One is controlled by the temperature change of the cooled object, and the vapor pressure temperature controller is mostly used, and the other is controlled by the temperature difference change of the cooled object, and the electronic temperature controller is mostly used.
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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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RLC Thermostat – Instructions for installation and use of pop-up thermostats
1. Grounding method: It is connected to the grounding metal parts of the equipment through the metal cover of the thermostat.
2. The thermostat should work in the general indoor environment where the relative humidity of the air is not more than 90%, and there are no corrosive gases, flammable gases and conductive dust.
3. The thermostat adopts contact ...
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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 Level Gauge – How to properly use a plug-in float level gauge for level measurement
1. Select the appropriate level gauge
First of all, it is necessary to choose the appropriate level gauge. The following factors should be taken into account in the selection of a level gauge:
Measure the properties of the medium: e.g., temperature, pressure, viscosity, corrosiveness, etc.
Measuring range: i.e. the height range of the liquid ...
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RKC thermostat - what should be paid attention to when maintaining the thermostat?
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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RRKC thermostats – how are temperature controllers wired and commissioned?
1. Take out the room temperature controller, and then connect the power supply terminal of the temperature controller to the power supply according to the terminal diagram of the temperature control chart
2. Then take out the temperature sensor that comes with the temperature controller and detect it
3. According to the temperature controller terminal, the temperature sensor is connected to the controller's transmission.
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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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RKC Thermostat The structure, action principle and use of some commonly used relays
A relay is an electrical appliance that works automatically. When the amount of electricity such as voltage, current, and frequency or non-electricity such as temperature, pressure, and rotational speed is input to the relay, and when the specified value is reached, the contacts of the relay connect or cut off the circuit that controls or protects it. Relays are widely used in motor control and power ...
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RK thermostat - the selection and installation method and precautions of the central air conditioning thermostat
1. Thermostat output control power: The thermostat output control power is the first issue to consider when choosing a thermostat, which is related to the safety and stability of use, and may cause serious consequences if not selected properly, such as: fire. Thermostat products are marked with output control voltage and current, and the ...
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RKC converters – what are the functions of converters?
1. Power conversion: convert the voltage (rated 100V) and current (rated 5A or 1A) of the transformer into voltage (several volts) to meet the requirements of weak current components.
2. Isolation: current, secondary side security, and work grounding are used to ensure the safety of people and equipment, while weak current ...
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The main technical specifications of the RKG thermostat
Input: all kinds of thermocouple (TC), RTD standard current and voltage signals (see input type table);
Basic error: 0.5% of the input full-scale ±±1 word;
Resolution: 1°C, 0.1°C;
Sampling period: 3 times/sec
Alarm function: ...
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RKG thermostat - an introduction to the relevant knowledge of temperature controllers
The temperature controller is an electrical switchgear that controls the temperature of an air-conditioned room. The temperature range in the air-conditioned room controlled by the temperature controller is generally 18°C--28°C. The temperature controller commonly used in window air conditioners uses the principle of pressure to push the contacts on and off. Its structure consists of bellows ...
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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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A few things to note about the installation of the RKC thermostat
1) For RTD input, 3 wires with low resistance and no difference should be used.
2) The input signal line should be far away from the power line of the instrument, the power supply line and the load line to avoid noise and annoyance.
3) The power cord of the instrument is generally annoyed by the power supply.
4) Instrument complement ...
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How the thermostat works – RKC
Thermostat, according to the temperature change of the working environment, physical deformation occurs inside the switch, so as to produce some special effects, a series of automatic control elements that produce on-on or off-action actions, or different principles of electronic components at different temperatures and working states to give ...
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What should I pay attention to when wiring the RKG thermostat?
1. For thermocouple input, the corresponding compensation wire should be used.
2. For 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. The instrument power cord is usually ...
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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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