1. There is no liquid level display or lower liquid level display
When the sewage is discharged, only a small amount of condensate flows out, and it is judged that the pontoon is blocked.
Treatment: Dismantle the outer pontoon and find that the pontoon is almost filled with dirt and impurities. Clean, calibrate, and return to normal.
2. The upper limit of liquid level display
The dirt is stuck at 100% of the pontoon, causing the upper limit of the pontoon output current.
Treatment method: first to discharge, if the display back to zero, then not stuck, if it is still 100%, then the pontoon is stuck. Pay special attention to the liquid level of the medium that is easy to crystallize and clog, and first check whether there is a blockage problem. Stop the meter, clean up the dirt in the pontoon, open the meter, and the liquid level display is normal.
3. The liquid level display is high
There is no change in the calibration of the liquid level. The rigidity of the pontoon level gauge torsion tube may change.
Solution: Recalibration. The purpose of calibrating the dry coupling point is to keep the torsion tube within the normal range.
4. The number displayed by the pontoon level gauge remains unchanged
Treatment: Go to the site to inspect the sewage and find that the positive side sampling pipe is blocked. Continue to discharge sewage until the positive pressure side is unobstructed and the meter display is restored.
5. The level display of the float level gauge is low
The glass level gauge indicated 80%, while the gauge only showed 60%, then checked that the transmitter circuit was normal, removed the float level gauge, calibrated, and found that the pontoon was corroded and leaked, resulting in water ingress.
Solution: Replace the pontoon level gauge, recalibrate, display the liquid level and restore the control.
6. The newly installed pontoon level gauge will reduce the output current as the liquid level increases.
Generally, this fault will occur when the pontoon leaks inside, if the quality problem is eliminated, consider whether there is leakage. Upon inspection, it was found that the output signal was set incorrectly.
Solution: Modify the output signal, the output current of the instrument is consistent with the change of liquid level. It is recommended to check the settings after the replacement of a new installation.
7. There is no change in the liquid level display.
The level of the gasoline dispensing tank shows no change at 25%.
Treatment method: It is judged that there may be too much dirt at the bottom of the tank, and after cleaning, the fault occurs again after a week of operation. Sewage again, still showing 25%; There is no change in water calibration, and the display will change through the pontoon. Rinse and adjust with water repeatedly, and the instrument is restored.
|
More on that
|
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 ...
|
|
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
...
|
|
RKC Level Gauge - the principle of the selection of float level gauges
The float level gauge is widely used, mainly used in petroleum processing, food processing, chemical industry, water treatment, manufacturing, electric power, papermaking, metallurgy, ships and boilers and other industrial automation processes to measure and control the level.
1. Pay attention to the specific working conditions. As introduced ...
|
|
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...
|
|
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, ...
|
|
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.
...
|
|
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 ...
|
|
RKC Thermostat – Teach you how to choose a thermostat
(1) Size selection
When replacing the thermostat, choose according to the original size; The newly added thermostat should take into account the overall coordination of the cabinet installed, too large to fit, too small to see the display, the same function of the thermostat, the price of large volume will be more expensive, small size may function expansion...
|
|
RRKC thermostat – the main function of the thermostat
In most cases, in Europe, the thermostat is a necessary accessory for the wall-hung boiler, and the two are delivered to the user at the same time, and most of the thermostats equipped are intelligent thermostats. In China, nearly 95% of the wall-hung boilers that have been installed in operation and are being installed and debugged and ready to be put into use are not equipped in advance.
|
|
RKC Level Gauges – Precautions for Level Gauges
The correct selection of the level gauge can ensure the better use of the level gauge. What kind of level gauge should be selected according to the physical and chemical properties of the fluid medium to be measured? What is the diameter of the level gauge, the flow range, the lining material, the electrode material, and the output current? can adapt to the ...
|
|
RK Thermostat - The working principle and device precautions of liquid expansion thermostat
How liquid expansion thermostats work
Liquid expansion thermostat is a physical phenomenon (volume change) that causes the material (generally liquid) in the temperature sensing part of the thermostat to undergo corresponding thermal expansion and cold contraction when the temperature of the controlled object changes, and the diaphragm box connected with the temperature sensing part expands or ...
|
|
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 ...
|
|
How to set the parameters of the RCRS400 thermostat
1. Set temperature: 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 ...
|
|
RHK thermostat - common faults and maintenance methods of thermostats
1. Thermostat contact contact failure
Poor contact of the thermostat contacts will cause the compressor to not operate properly. If the contacts are sticky, the compressor will fail without downtime. For this, you can use a small screwdriver to open the metal shell of the thermostat, and then use a fine abrasive cloth to polish the surface of the contacts ...
|
|
RLC thermostat - common faults and treatment methods of dry-type transformer thermostats
1. There is no display of dry-type transformer thermostat
Cause of failure: (1) The power supply of the thermostat is not connected; (2) The fuse is blown out.
Solution: (1) Turn on the power supply; (2) Replace the fuse.
2. The dry-type transformer thermostat shows that one or three phases are flashing and displays "-OP-"
...
|
|
RDC converters – a classification of power converters
Motors are divided into two categories: DC motors and AC motors, and AC motors are divided into asynchronous motors and synchronous motors, and their respective speed regulation principles are also different. According to the speed regulation requirements of the motor, it can be divided into two categories: DC power converter and AC power converter:
...
|
|
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.
|
|
Specifications and models of RKC thermostats
1. RH400 size: 48*96, depth 60, about 250g
1. Thermocouples: K, J, R, S, B, E, N, T, W5RE/W6RE, PL‖, U, L
2. Temperature measurement heat resistance input: PT100, JPT100
3. Tributary voltage: DC0 - DC5V, DC1 - DC5V
...
|
|
Introduction to the functions of the RKC temperature control meter
(1) RH400 size: 48*96, depth 60, about 250g
Details:
●A variety of input types are available:
1) Thermocouples: K, J, R, S, B, E, N, T, W5RE/W6RE, PL‖, U, L
2) Temperature measurement RTD input: PT100, JPT100...
|
|
Introduction to the types of alarms for RRKC thermostats
* Alarm table {ALM1} (standard built-in)
A: Upper limit deviation alarm G: Standby upper and lower limit deviation alarm attached
B: Lower limit deviation alarm H: Upper limit input value alarm
C: Upper and lower limit deviation alarm J: Lower limit input value alarm
D: Alarm in the range K: Attached standby ...
|
|
Contact
working hours
