Cauldron type radar liquid level gauge

Products overview:

ZWRD904 seriesIs 128 GHZ radar level measurement products.Adopted the advanced microprocessor, unique to the embedded operating system.Hf radar emission wavelength, energy concentrated penetration ability.Can easily penetrate the foam, the interference of water vapor and dust.After optimization, false echo echo processing processing technology, software, digital processing technology, to calculate the real level.Connect multiple antenna pattern and process, and application solutions, under various working conditions can be used for temperature, pressure, and had more unique application solutions small dielectric constant.Integration of HART communication technology at the same time, the modular digital display module.Make the product in the application, debugging scheme is diversiform, debugging is simple.

Second, the working principle:

ZWRD904 series cauldron 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:

ZWRD904 series cauldron 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 application of medium:

Electricity plant, coal, raw coal, fuel storage, reservoir, exhaust gas purification tank, pump, ash library, tank, etc.;

Oil fields: crude oil or refined petroleum products storage tanks, three-phase separator, sedimentation tank, sewage tank, oil-water interface and drilling mud tank, etc.

Work: the crude distillation tower, raw material and intermediate bunker tank, reaction tank, ammonia, solid bin, separator, etc.;

Kim: smelting ore bin, ore mill, raw material warehouse, accessories warehouse, blast furnace, alumina powder storehouse, electrolytic cell buffer tank, etc.;

The water mud, stone warehouse, pulverized coal bunker, cement warehouse, warehouse, slag storage warehouse, etc.;

Water treatment: reservoirs, sewage pool, cans, sedimentation tank, deep well water treatment, drinking water network, etc.;

Made of paper: raw materials warehouse, towers, drum drying, chemical storage materials storage warehouse, etc.;

He: its quarry, food, pharmaceutical, environmental protection, shipbuilding and other industries.

Five, 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.

Six, 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: 126 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).

Seven, the debugging methods:

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.

Eight, 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.

Nine, 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.

Ten, the matters needing attention:

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: