Split type ultrasonic level meter

Products overview:

ZWS - 200 kf seriesIs a kind of intelligent non-contact liquid () a measuring instrument.Product has transmitted power can be adjusted, the full range gain control, automatic temperature compensation function, and USES the original testing and calculation method, can identify false signal, thus effectively remove all kinds of jamming signal.Because the original calculation method of the detection and fundamentally improve the measurement precision of the this series of products and the data stability.

Second, the working principle:

Kf ZWS - 200 series ultrasonic liquid level meter is through a separate emit energy wave pulse signal is (usually) wave energy device transmission, energy wave encounter obstacles reflections, received by a receiving device reflected signal.According to the measured energy wave motion in process of time to determine the level changes.The microwave signal processing by electronic devices, into the electrical signals associated with material level.

Launched a probe to the surface of the measured medium ultrasonic pulse signal, the ultrasonic wave in encountered in the transmission process of the medium to be measured (obstacles) after reflection, reflected ultrasonic signal through the electronic module testing, processed by special software, the analysis of launch ultrasonic wave and echo of time, the combination of ultrasonic velocity, can be accurate to calculate the distance of ultrasonic transmission, which can reflect the level of the situation.

Applications:

ZWS - 200 kf series of split type ultrasonic level meter used in petroleum chemical industry, metallurgy, electric power, pharmaceutical, water supply and drainage, environmental protection system and industry such as all kinds of medium level measurement.Exquisite structure, simple adjustment and flexible installation convenience is provided for the user to easily use.4 ~ 20 ma, 0 ~ 5 v, 0 ~ 10 ma and standard signal output by the user choose according to need.

Four, the main features:

1, is featured by strong anti-interference.Nodes can be arbitrary set upper and lower limits for the output and online, with the scene, according to the optional analog and switch quantity output and RS485, convenient interface and related facilities.

2, using polypropylene waterproof shell.Shell is small and very strong, it has excellent chemical resistance, for inorganic compounds, regardless of acid, alkali, salt solution, in addition to the strong oxidizing materials, almost all of its no damage, for almost all the solvent at room temperature are insoluble, general alkanes, hydrocarbons, alcohol, phenol, aldehyde, ketone, etc all can use.

3, light weight, no scaling, no pollution medium.

4, non-toxic.Can be used in the food industry equipment installation, maintenance is very convenient.

Five, the technical parameters:

Ambient temperature: - 20 ~ 50 ℃;

Relative humidity: 5% ~ 99% (including direct wet);

Environment pressure: 86 kPa to 108 kPa.

Measuring range: 0.25 ~ 5 m, 8 m, 10 m and 12 m, 15 m wide range (customizable)

Operating frequency: 30 KHZ;

4-20 ma/signal output: HART protocol, the switch quantity PNP (NPN), relay output (order agreement);

The scene shows: four LED display;

Load: 24 VDC 550 Ω (4-20 ma);

The power supply voltage: 24 VDC (18 ~ 24 v);

Power consumption: 1.2 W (55 ma, DC24V);

Measurement error: 0.5% of the range () in the air;

Resolution: 2 mm or less (built-in temperature compensation);

Response time: 1.5 s;

Launching beam Angle: 10 ° or less;

The process pressure: 0.2 MPa or less;

Process temperature: - 40 ~ 70 ℃ high temperature resistant, resistant to moisture must be customized);

Protection grade: IP65.

Six, container installation conditions:

1, airtight container:

A, to 8 m below range, vessel to have more than DN65 flange, length without requirement of the flange to take over.

B, to 10 m, 12 m range, vessel to have more than DN80 flange, the flange of the over length is less than 150 mm.

C, to 15 m range, vessel to have more than 6 flange, the flange of the over length is less than 150 mm.

D, to 20 m, 30 m and 40 m range, vessel to have more than DN200 flange, the flange of the over length is less than 200 mm.

2, open container:

A, to 8 m below the range, the container should have a diameter of 65 mm above the installation.

B, to 10 m, 12 m range, the container should have a diameter of 80 mm or more installation, installation of mouth thickness is less than 150 mm.

C, to 15 m range, the container should have a diameter of 150 mm above the installation, installation of mouth thickness is less than 150 mm.

D, to 20 m, 30 m and 40 m range, the container should have a diameter of 200 mm above the installation, the installation mouth thickness is less than 200 mm.

Seven, the principle of installation:

1, probe surface to the low level of distance that range should be less than the choose and buy the instrument.

2, probe emission surface, the distance to the high level should be greater than the choose and buy the instrument of blind spots.

The launch of 3, probe surface should be keep in parallel with the liquid surface.

4, the installation position of probe should try to avoid directly into, discharging mouth, etc. The location of the liquid level of volatility.

5, if the wall or the tank wall is not smooth, instrument installation location should leave the wall or the tank wall above 0.3 m.

6, if the probe emission surface is less than the distance to the zui high level instrument of the blind area of choose and buy, need to add extension tube, tube diameter greater than 120 mm, length is 0.35 m ~ 0.50 m, the vertical installation, wall smooth, opening should be greater than extension tube diameter on the tank.Or will be piped to the tank bottom, pipe diameter greater than 80 mm, tube bottom hole for keep the extension tube liquid level as high as the summits of the tank.

Eight, the choice of the form of connection:

1, two wire system: two wire ultrasonic level meter its power supply (DC24V only) and the signal output (D - 20 ma) share a loop, using only two lines, as the standard form of transmitter.

2, three-wire system: three wire ultrasonic level meter, in fact, as the four wire system, its power supply (DC24V only) and the signal output (D - 20 ma) circuit separation, the use of two lines, when they were connected to negative side, usually use three lines.Its advantage is transmitted power is larger.

Three and four wire system: power supply (DC24V or AC220V) and signal output loop separation (D - 20 ma), use two lines, its advantage is transmitted power is larger, at the same time provides the high and low relay output, increased the new function.

4, measuring range:

A, according to the actual range to choose corresponding model of ultrasonic level meter.

B, if measured volatile liquid, please select a large range level model.

C, solid of effective range of the measurement of liquid level range of 1/2 to 2/3.

5, power supply form:

DC24V power supply:

A, give two wire series power supply current capacity shall be not less than 30 ma.

B, to provide three wire series power supply current capacity should not be less than 60 ma.

C, offers four wire series power supply current capacity shall be not less than 80 ma.

AC220V power supply:

Can only choose four wire series products, power supply current capacity shall be not less than 50 ma.

Nine, use notice:

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. The instrument itself with lightning protection devices, but the 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, ultrasonic probe and measured the level of vertical, within the scope of the ultrasonic launch cone cannot have other obstacles.

6, if the < - 20 ℃ or > + 60 ℃ temperature for use, please in advance in technology services around the world.

7, using the environment with dust, vapor, mist, liquid level bubble, floats, liquid mixing, waves, and so on and so forth, please in advance in the technical service department, all over the world need to discriminate.

Ten, parameter table:

Eleven, selection of coding:

Note: if measured volatile liquid, please choose a big level model, solid level of effective range of the measurement is 1/2 to 2/3.

Description:

1, two wire series no 12 meters, 40 meters range models.

2, three-wire system series no 10 meters, 40 meters range models.

3, four wire series and split type standard no 10 meters range models.

4, thin no 12 meters, 40 meters range models.

Five, four wire and split type DC24V power supply products can provide LED digital tube display, all other products are LCD liquid crystal display (LCD).

Twelve, design selection and order notes:

1, the measured medium type.

2, medium temperature and pressure.

3, corrosive medium, if it's in the jar, material, need to know the jar have anti-corrosion lining.

4, whether to need to explosion-proof, anti-corrosion.

5, measuring range is a few meters.

6, connection mode: flange connection, threaded connections.

7, working environment, such as exposure, a cover plate of the pool, pool lie cans, cans, spherical tank, whether the jar with atmospheric pressure, etc.

8, working voltage: 24 VDC.

9, output signal: 4 ~ 20 ma current.

After-sales service commitment:

1, our company sold by wei ultrasonic series products appear quality problem, within twelve months for free maintenance.

2, the warranty period, any quality problems such as the products of our company, my company is responsible for free repair or replacement.

3, the warranty period, such as user improper use, damaged products, my company is responsible for the maintenance, charge damage parts cost.

4, if use, product quality assurance period appear quality problem, my company is responsible for the maintenance, charge damage parts cost.

5, households need to my company site services, to users in the province I company service personnel to reach the site within 12 hours, fujian association of foreign languages and user reach the site within 48 hours.