1. Electromagnetic induction (refers to the coupling of magnetism). There is a strong alternating magnetic field in the surrounding space of high-power transformers, AC motors, strong current power grids, etc., and the closed loop formed by the control system (detection, transmission, conversion, regulation, calculation, execution, auxiliary, display and other units) will be induced in this changing magnetic field, so that the connection wire between the signal source and the instrument, and the wiring inside the instrument will form interference in the circuit through magnetic coupling. This electromagnetically induced potential is connected in series with the desired signal, and the interference is more prominent when the signal source is far away from the display instrument. In addition, equipment such as high-frequency generators and motors with commutators can also generate high-frequency interference.
2. Electrostatic induction (refers to the coupling of electricity). Electrostatic induction is the result of the interaction of two electric fields. If the potential of one of the two wires changes, the potential of the other wire also changes due to the change of capacitance between the wires, and the interference source forms interference in the loop with capacitive coupling.
3. Additional thermoelectric and chemical potentials. Due to the thermoelectric potential generated by different metals and the chemical electric potential generated by metal corrosion, DC electrical interference is formed in the circuit circuit.
4. Vibration. In a highly vibrating environment, the wire generates an induced electric potential due to its motion in the magnetic field, and this interference is connected in series with the signal and enters the instrument in the form of serial mode interference.
5. Interference introduced by different ground potentials. In the vicinity of high-power electrical equipment, when the insulation performance of the equipment is poor, the introduction of the potential difference of different ground potentials forms interference, and in the use of the instrument, there are often more than two connection points at the input end, so that the potential difference of different grounding points is introduced into the instrument in the form of common-mode interference, and this interference appears on the two signal lines at the same time.
6. The signal source is an unbalanced bridge. When the bridge power supply is grounded, in addition to the unbalanced voltage (i.e., the signal voltage) on the diagonal of the bridge, both signal lines have a common mode interference voltage to ground. Although common-mode interference does not superimpose with the signal and does not directly affect the instrument, it can directly act on the instrument (or amplifier) through the measurement system to form a leakage current to the ground, and through the coupling of resistors, it can directly act on the instrument (or amplifier) to produce interference.
7. In addition to acting on analog circuits, some pulse-like interference voltages can sometimes directly enter digital circuits to give interference, and the sources of these interference voltages are inductive loads such as switches, motors, relays, and machines that produce discharges.
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RLC thermostats – the classification of thermostats and their detailed introduction
1. Sudden jump thermostat
The type of various sudden thermostats is collectively 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 connected with the thermal fuse in series, sudden temperature ...
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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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RHK product model introduction
RHK Recommended Product Models:
Single-phase power conditioner
THV-10（20A, 30A, 45A, 60A, 80A, 100A）
Ethernet communication converter
COM-ME series
USB communication converter
COM-KG
Digital Display Controller (Process/Temperature)
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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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RK Level Gauge - Introduction to the characteristics of float level gauge
It is suitable for measuring the level and interface of the liquid medium in the container. In addition to on-site instructions, it can also be equipped with remote transmitters, alarm switches, and detection functions.
The indication is novel, the reading is intuitive, eye-catching, and the direction of the observation indicator can be changed according to the user's needs.
Large measuring range ...
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RK thermostat - the performance characteristics of digital display thermostat are introduced
1. The special integrated instrument chip has more reliable anti-interference and stability.
2. Signal input, ordinary heat signal can be connected through menu settings.
3. You can modify the display range, transmission output range, alarm value and online report J mode.
4. Soft ...
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RRKC thermostats – the commissioning steps of mechanical thermostats
1. Confirm the angle sample first. See where the angle of the sample is today.
2. Pick up the thermostat, first confirm whether the switch of the thermostat is tight, stuck, whether the white dot falls off, whether there is sound when the thermostat contacts are in contact, and if there is no sound, there should be two possibilities!
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Parameter setting operation of RLC temperature control table CH402
Model: CH402FS01-8*HN (for PECVD temperature control)
1) Single press SET: SV can be set (set temperature manually)
2) Press and hold the SET button for 2 seconds, ALI=1000 (absolute alarm temperature setting) and then press the SET button, ATU=1 (self-defining, self-interpreting a set of PID parameters) to exit ...
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rkc thermostat – five advantages of thermostat over PLC
Programmable logic controllers (PLCs) and temperature controllers (thermostats) offer similar benefits in ensuring effective process control, achieving consistent quality, and minimizing user error in manufacturing.
Since the 17th century, process control equipment has been used in a variety of forms.
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How to set the parameters of RKC thermostat RH900
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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What should I pay attention to when setting up my RKC thermostat?
Wiring Warning:
If the instrument fails or an error occurs, which can cause a system failure, an external protection circuit is installed to prevent such accidents:
In order to prevent damage or failure of the instrument, choose an appropriate fuse to protect the power cord and input and output lines from strong power shocks.
Power supply ...
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RKC Level Gauge – Precautions for the installation of float level gauges
1. The specific gravity of the liquid to be measured must be greater than the specific gravity of the float
2. The measured medium should not contain ferromagnetic impurities
3. The float level gauge should be installed in an unobstructed position when the float moves up and down
4. Magnets are not allowed to be close around the float level gauge, otherwise it will affect the float.
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RLC thermostat - introduction to the performance characteristics of intelligent digital display controller
1. The special integrated instrument chip has more reliable anti-interference and stability.
2. Signal input, which can be matched with commonly used thermal signals through menu settings.
3. The display range, transmission output range, alarm value and alarm mode can be modified online.
4. Soft ...
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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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RRKC Thermostat – Questions and Precautions About Thermostat Expansion Modules
1. Under what circumstances should I use a thermostat to expand the module?
The gradual development of the heating field is now very well recognized, and more and more users have begun to install electric heating, of course, when installing electric heating for users, they have also encountered some headaches.
For example, a large area ...
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RKC Level Gauge – Buoy Level Gauge Use and Precautions
1. Support welding under the guidewire:
According to the direction of the movement of the buoy of the level gauge, determine the position at the bottom of the container, and fix the guide bracket (piece 1) under the welded or riveted steel wire
2. Install the guide rail joint.
(1) Straighten the wire forcefully and fix it at the lower support, taking care not to ...
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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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How to set the parameters of the RKC fb900 thermostat
Model definition
FB90②③*④4⑤⑥⑦⑧⑨-0(
CODE 8N-4*4NN5/A1-F801/Y
control
"(1)(2)" indicates Output 1 and Output 2 classes
M: Relay output V: Voltage pulse output 5: 0-10V
8: 4-20mAN: No output
“ ...
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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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The main technical indicators of RKC thermostat
The main technical indicators of RKC thermostat
· Input: various 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;
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Contact
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