Integrated advantages of ultrasonic level meter - SIKE measurement and control
Henan SIKE tt&c directory
Ultrasonic level meter
1.Product introduction
2.The working principle of
3.Site conditions
4.Instrument model
5.Installation requirements
6.Electrical connections
7.Technical parameters
8.The product selection
1, product introduction SK ultrasonic liquid level meter is controlled by microprocessor digital level instrument. In the measurement of ultrasonic pulse made by sensor (sensor), the sound waves reflected material surface by the same sensor after receiving, converted to electrical signals. And by sound waves between transmitting and receiving time to calculate the sensor to the distance of the object to be tested. Due to adopting noncontact measurement, measured medium quality almost unlimited, can be widely used in all kinds of liquid and solid material height measurement.
2, the working principle of SKCS series working principle of the ultrasonic level meter is made by ultrasonic sensors (probe) ultrasonic pulse have measured level (material) surface is reflected, the echo are converted to electrical signals received by the probe. Acoustic travel time and sound waves to object is directly proportional to the distance from the surface. Sound wave transmission distance S relationship with the sound velocity and acoustic transmission time T C available formula said: S = C * T / 2 distance [m] = time / 2 x the speed of sound speed [m]
3, field condition 1) ambient temperature: - 20 ~ + 60 ℃, low temperature situation need special instructions). 2) watch case protection level: IP66 is suitable for outdoor installation. 3) for measuring the medium: suitable for most of the liquid, weak acid, weak alkali, alkali, acid less than 40%. If in strong acid applications, please contact our company, you should use anticorrosive probe. 4) the container pressure: 0.7 ~ 2 bar. 5) in the following any situation, please contact with our company.
A. have bubble liquid/solid
B. around with high voltage, strong current, strong electromagnetic interference, try to avoid high voltage, high current and strong electromagnetic interference
C. the wind and the sun to be basked in straight
D. strong vibration
4, instrument type
SKCS61
Application: | All kinds of liquid level measurement in the field of industrial, especially in water treatment industry |
Measuring range: | Liquid 0.4-5(m) |
The process connection: | The screw thread |
Probe the shell material: | PU/PC |
The process of temperature: | -40-70℃ |
The process of pressure: | -0.2-1bar |
Signal output: | Two wire / 4-20 ma |
SKCS62
Application: | All kinds of liquid level measurement in the field of industrial, especially in water treatment industry |
Measuring range: | Liquid 0.4-10(m) |
The process connection: | The screw thread |
Probe the shell material: | PU/PC |
The process of temperature: | -40-70℃ |
The process of pressure: | -0.2-1bar |
Signal output: | Two wire / 4-20 ma |
SKCS63
Application: | The level measurement of all kinds of industrial fields |
Measuring range: | Liquid 0.5-15(m) |
The process connection: | The screw thread |
Probe the shell material: | PU/PC |
The process of temperature: | -40-70℃ |
The process of pressure: | -0.2-1bar |
Signal output: | Two wire / 4-20 ma |
5, installation requirements
(1) the basic requirements
During launch ultrasonic pulse probe, there are certain emission Angle. Between the probe bottom to the surface of the measured medium, should not have obstacles, when installation should try to avoid obstacles, such as: stents, heating coil, impeller, etc. Ultrasonic instrument shall not be installed in the mouth.
Note: the highest level shall not enter at the top of the measuring blind area; Instrument installation of tank wall must keep a certain distance; The installation of instrument make the probe of ultrasonic launch direction perpendicular to the surface.
(2) the schematic
(3) the installation drawing
When installing a SKCS series ultrasonic, instrument and vessel wall at least keep a distance of more than 300 mm, suggest install the instrument in 1/4 or 1/6 of the diameter of the tank.
(4) the error with the correct installation, for example
1) error: do not install the instrument in above into the mouth, the measured data of such installation is filling material flow rather than a true medium level.
2) right: instrumentation installation should be away from the mouth, try to avoid obstacles. (note: outdoor installation should add a shield to sun and rain.)
(5) the moisture
Should tighten the cable gland first, and then let the service entrance cable bend, such as graphic:
(6) containers to take over
The length of the container are: must ensure that the probe out of the container to take over at least 10 mm.
(7) the drum
When the tank is stirring, instrument installation position as far as possible away from mixing slurry
(8) guided wave pipe installation
Guided wave pipe installation (guided wave tube or by-pass pipe), container can avoid obstacles, air bubble and eddy current effect on the measurement.
1) the surface of the liquid medium with foam, can cause measurement error, the attenuation of ultrasonic signals or can be installed on the guided wave ultrasonic probe tube to solve.
2) if the container has strong airflow should be installed in the guided wave ultrasonic probe tube, can improve the accuracy of measurement.
Generally, such as hole diameter of 10 mm, made at the bottom of the oblique mouth, is advantageous for the liquid circulation
Note: measuring the adhesive medium, cannot use the guided wave pipe installation.
6, electrical connection
24 VDC power supply mode
4-20 ma (two wire system) power supply and the current signal has a two core cable.
Product wiring diagram
7, technical parameters
The process connection WKCS61, 62, 63: | Thread/flange |
The probe materials: | PU/PC |
The probe seal: | silicone |
The power supply voltage: | 16-32V DC |
The output signal: | 4-20mA |
Resolution: | 1.6uA |
The fault signal: | Current output: 20.5 mA; 3.8 mA |
Launch Angle WKCS61, 62: | 7° |
Launch Angle WKCS63: | 5° |
Resolution: | 1mm |
Repeatability: | 3mm |
Accuracy: | 0.2% or 0.5% (full scale) |
The process of temperature: | -20+70℃ |
Relative humidity: | <96% |
Pressure: | Max.2bar |
Cable entry: | M20X1.5 |
8, product selection
Instrument types, and the maximum range