Health radar liquid level gauge
Health radar level meter using advanced radar pulse wave measurement technology, with its excellent …
Description：
Products overview:
ZWRD906 seriesHealth radar liquid level gaugeAntennas and microwave narrow pulse, the pulse in the space at the speed of light transmission, met on the surface of measured medium, some of its energy is fired back, by the same antenna.Firing pulse and receives the pulse interval and the antenna to the surface of the measured medium is proportional to the distance, up to 26 GHZ transmission frequency.Measuring distance of 30 metres.Mainly used to measure the process of storage tanks, tank, medicine and food industry will not contaminated liquid, convenient cleaning.
Second, the working principle:
ZWRD906 series health type radar level meter is the measuring instrument based on the principle of time travel, very low energy is emitted by a very short microwave pulse by transmitting and receiving antenna system.Radar wave are running at the speed of light.Running time can be transformed into material level signal by electronic parts.Probe a high-frequency pulse and probe the conduction along the cable type or rod type, when the pulse in the material surface reflected by the receiver inside the instrument, and the distance signal is transformed into material level signal.A special type of time extension method can guarantee the stability of a very short period of time and accurate measurement.Even if the condition is relatively complex, false echo, with a new micro processing technology and debug software can accurately analyze the level of the echo.
The input
Antenna receiving the reflected microwave pulse and sending them to the electronic circuit, microprocessor to signal processing, identify the micro pulse produced by the echo in the material surface.Correct echo signal recognition completed by intelligence software, precision can reach millimeter level.Distance on the surface of the material distance D is proportional to the pulse travel time T:
D=C×T/2
Where C is the speed of light
E known due to empty cans of distance, the level of L as follows:
L=E-D
The output
By entering empty cans height E (= zero), full tank height F (= full scale) and some applications to set parameters, application parameters will be automatically adapt instrument to measure the environment.Corresponding to the 4-20 ma output.
Applications:
ZWRD906 series health type radar level gauge is suitable for liquid, paste, and granular material a non-contact continuous measurement, and the change of temperature, pressure, and presence of inert gas and volatile situations.Using microwave pulse measurement method, and can be within the scope of industrial frequency band to work normally.Beam energy is low, can be installed in all kinds of metal, non-metallic vessel or pipe, no damage to the human body and the environment.
Four, the main features:
1, the beam Angle is small, the energy concentration, for radar installation location has more flexibility.Have stronger anti-interference ability, greatly improve the measurement precision and stability.
2, small antenna size, convenient for radar installation, at the same time for small tanks and tanks special measurement has a better adaptability.
3, the measuring blind area small, big z limit increases the radar measurement range.
4, shorter wavelength for powder, granular materials such as measure effect is better.
5, launch the pulse signal, transmission power radar level meter is extremely low, can be installed in all kinds of metal and nonmetal container, no harm to human body and environment.
Five, the technical parameters:
1, application: solid storage containers, containers or strong dust easily crystallized, condensation occasions;
2, measuring range: 70 m;
3, measuring accuracy: + / - 15 mm;
4: (- 40 ~ 80 ℃), process temperature (40 ~ 130 ℃ (60 ~ 250 ℃) (60 ~ 400 ℃).
5, frequency: 26 GHZ;
6, the signal output (4 ~ 20 ma), HART, Modbus;
Two wire system, power supply, 24 v, 24 v / 220 v; four wire
8, field showed that the standard;
9, shell, selection;
10, process connection: thread/flange;
11, antenna: the horn (316 l stainless steel).
Six, the debugging method:
A, can through debugging in three ways:
1, by displaying the adjustment module PM;
2, through debugging software SOFT;
3, handheld programmer by HART.
B, through SOFT software debugging:
No matter the signal output, 4-20 ma/HART, radar sensors can be through the software debugging.Is instrument with the SOFT software debugging, need a meter CONNECTCAT drives.
Using software debugging, for the radar instrument 24 VDC power up, at the same time connect HART adapter front end with a resistance of 250 ohms.If the one-piece HART resistance (250 ohm internal resistance) of electricity meter, there is no need for additional external resistance, HART adapter can and 4...20 ma line in parallel.
Seven, daily check the maintenance:
1, daily inspection maintenance mainly to check the power supply voltage and output current is normal.About 30 ~ 60 min after electrify, instrument can work normally.If there is no output parameter meter, should check whether the power supply is connected to real, and check whether the fuse is burnt.
2, when using is become an organic whole repeatedly and equipment, the whole system radar level meter is sealed, so at ordinary times should also check the sealing condition of joints of different parts are in good condition.
3, radar, head of the use of the internal temperature of 65 ℃.General use cases not more than the temperature, but if the temperature of the measured medium is very high, is the temperature inside the radar head could exceed 65 ℃.At this time, can use a small amount of wind, by the phi 6 x1 copper tube rain hat head blow in radar, to internal temperature down, never to do mechanical cooling water or other liquid.
4, volatile organic compounds in crystallization or antenna, radar level gauge trumpet to timely inspection and cleaning.
Eight, environmental impact factors are:
1, the influence of the obstacles.
If the launch of the electromagnetic wave instrument comes into contact with the barrier, then you'll get a jamming waveform.If you can't choose other ideal installation location, choose the small beam Angle instrument or using guided wave tube and by-pass pipe installations can be solve the problem.
2, the influence of the transmission medium
(1) the temperature;
(2) pressure;
(3) the transmission medium corrosion resistance;
(4) whether the transmission medium contains steam or dust, etc.;
(5) the volatiles in the environment with crystallization or dust adhesion problems.
To solve the above problem, then we will guarantee, electromagnetic waves or ultrasonic arrived in material surface under test, no big attenuation.Measured on the surface of the material through reflection, get a echo signal.The strength of the echo signal and the measured material surface under state.
1, the dielectric constant of the measured substance or hardness.
The strength of the dielectric constant influence the electromagnetic wave reflection.The echo of the dielectric constant, the greater the stronger.While the hardness is reflection of sound waves.The greater the hardness, the stronger the sound wave reflection.
2, on the surface of the material being tested pile Angle;
3, on the surface of the material being tested stability;
4, particle degree of the measured object and loose;
The analyte 5, moist degree.
Nine, note:
1, measurement range from the beam hitting a can of low starting point, but under special circumstances, if the tank is low for concave type or conical, when the level below this point cannot be measured.
2, if the medium to low dielectric constant when it is in low level, low visibility, at this time in order to ensure the accuracy of measurement, the recommendations will be zero at low altitude to the position of the C.
3, theory, measurement to achieve the position of the antenna tip is possible, but considering the corrosion and the influence of the adhesive, the final value of measuring range should be at least 100 mm distance from the tip of the antenna.
4, the overflow protection, additional on the blind spot can define a safe distance.
5, measurement range related to the antenna.
6, with different concentration, foam can absorb microwaves, and it can be reflected, but under certain conditions can be measured.
7, measurement is beyond the scope of action when the measuring range beyond, instrument of 22 ma current output.
Ten, use requirements:
1, the meter used in outdoor, install the awning or protect box, lest time grew, LCD aging by sunlight.If used in the corrosive gas environment, need to install anti-corrosion coat, and outer casing and tighten the instrument into the outlet terminals.Where corrosive gas or liquid is used, or at the beach, sea use, need to choose anti-corrosion type.
2, wire, cable protection tube, pay attention to the seal to prevent water, to prevent rodent bite by rats, etc.
3, instrument, although itself with lightning protection device, instrument when used in dore region, Suggestions on the instrument into the outlet end of the other special installation of lightning protection devices.
4, instrument used in special hot and cold place, namely the ambient temperature may exceed the instrument work requirements, proposed around the liquid level meter high resistance, low temperature device.
5, radar and measured the level of vertical, the launch of the cone in radar electromagnetic wave must be within the scope of other obstacles.
6, if the < - 20 ℃ or > + 60 ℃ temperature for use, please in advance the company's technical service department.
7, using the environment with dust, vapor, mist, liquid level bubble, floats, liquid mixing, waves, and so on and so forth, please our company in advance technical service department, need to discriminate.
Eleven, parameter table:
Product category | ZWRD904 | ZWRD905 | ZWRD906 |
Product pictures |  |  |  |
Range of application | Process conditions of simple, solid blocks Strong material, dust environment such as: | Solid block, particle material | Health or strong corrosive liquid |
measuring The amount van wai | 70m | 20M optional | 30m |
pass cheng evenPick up | Thread, universal flange | Thread, flange | Thread, flange |
pass cheng wenThe degree of | - 40-250℃ | - 40-250℃ | - 40-250℃ |
pass chengpressure force | -1.0-3bar | -1.0-20bar | -1.0-40bar |
heavy after sex | ± 3mm | ± 3mm | ± 3mm |
fine The degree of | < 0.1% | < 0.1% | < 0.1% |
frequency The rate of van wai | 26GHz | 26GHz | 26GHz |
explosion-proof/Protection grade | EXiaIICT6/IP68 | EXiaIICT6/IP68 | EXiaIICT6/IP68 |
The letter No.Lose, Out of the | 4…20mA/HART（The two lines） | 4…20mA/HARTTwo lines) | 4…20mA/HART（The two lines） |
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