Anti-corrosion type liquid level transmitter

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Anti-corrosion input type liquid level transmitter, liquid ptfe material for, use the spread of high…

Products overview:

ZW - DB503 seriesAnti-corrosion type liquid level transmitterAdopt import stainless steel isolation diaphragm high precision, high stability of the force sensitive chip with rational structure design of precision and temperature compensation thick film technology, signal amplifier, V/I conversion, to seal welding of stainless steel shell, waterproof cable ventilation ducts, the sensor back pressure cavity connected with the atmosphere, thus made the industrial standard of 4 ~ 20 ma, or 0 ~ 10 ma signal output and solid-state product performance is stable and reliable.Shell ptfe material for the whole, strong corrosion resistance.

Second, the working principle:

ZW - DB503 series anticorrosive investment measured with static pressure type fluid shift delivering principle;When the liquid level transmitter into the liquid to be tested in a certain depth, the sensor to meet the pressure on liquid surface formula is: Ρ = rho. We + Po type:

P: the pressure on the transmitter into liquid level

Rho: the measured liquid density

G: the local acceleration of gravity

Po: atmospheric pressure on the surface of liquid

H: transmitter into the depth of the liquid

At the same time, through the gas leading stainless steel will be introduced to the liquid pressure sensor of positive pressure cavity, and atmospheric pressure on the surface of the liquid Po and sensors connected to the negative pressure cavity, to offset the Po on the reverse of the sensor, the sensor measured pressure is: rho. We, obviously, through the acquisition of pressure P, can get the depth of the liquid level.

Applications:

ZW - DB503 series anticorrosive input type liquid level transmitter is suitable for the 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:

There were 1, simple structure, moving or elastic element, so stay on sex is extremely high, little maintenance.

2, easy installation, built in especially shows the characteristics of the structure, without any special tools.

3, easy to adjust, zero and span two potentiometer can be zero within the scope of the liquid level detection effectively any migration or range change, two adjustment each other.

4, widely used;Suitable for high temperature and high pressure, strong corrosive medium level measurement.

Five, the technical parameters:

1, the measuring range: stainless steel extension rod type 0 ~ 5 m;Guide gas cable type 0 ~ 100 m;

2, the system precision level: 0.2 magnitude 0.5 on the Richter scale;

3, using the environment humidity: - 20 ℃ ~ + 70 ℃;

4, relative humidity: 10% ~ 90%;

5, medium temperature: - 20 ℃ ~ + 80 ℃;

6, long term stability: better than 0.1% FS/year;

7, temperature stability: + 0.2% / 10 ℃;

8, power supply: : 24 VDC;

9, the signal output: two line 4 ~ 20 ma output.

Sixth, other parameters:

1, medium density range: 0.5 g/cm3 ~ 2.0 g/cm3.

2, overload ability: as 5 times as the standard range.

3, transmitter protection grade: IP65.

4, sensors, protection grade: IP68.

5, explosion-proof marks: iaIICT4 intrinsically safe;

6, transmitter shell material: membrane die-casting aluminum;

7, sensor material: type: stainless steel;Anti-corrosion type: ptfe;

8, fitting size: flange (PN2.5 (JB81-59);Thread M56 x 2.

Seven, installation and commissioning:

1, cable type and lever type liquid level transmitter has many installation fixed way, so as to adapt to different site conditions.When the site will not be able to provide M20 x 1.5 in the process facilities such as thread or the flange, can choose wall installation type, horizontal pipe frame and vertical posture, such as three optional installation way, make you comfortable when installation.

2, when measuring liquidity larger medium, to prevent violent oscillation sensor, the user can choose counterweight attachment, to have the effect of stable sensors, add weight must to put weight objects in the bottom of the container, in order to avoid pull bad sensing wires.

In the field environment is bad, the user should choose sensor shield to protect sensor, to avoid the foreign body damage or affect the accuracy of measurement.

3, when using the lever type liquid level transmitter, if not metal containers, you need to put the transmitter of the shell with a wire access the bottom of the container, otherwise not accurate measurement.

This product in the factory has a calibration, if need on-site adjustment can adopt the following methods:

1, using intelligent circuit debugging methods:

The zero -- -- -- -- -- - when the liquid level position is low, at the same time hold down the "Z" key and "S" key 8 seconds after release at the same time, then "Z" key press, the output current automatically adjusts to 4 ma.

Field adjustable full -- -- -- -- -- - when the liquid level high, at the same time hold down the "Z" key and "S" key 8 seconds after release at the same time, then the "S" key press, automatic adjustment to 20 ma output current.

2, USES the method of analog circuit debugging:

When the liquid level in the next period, use the screwdriver slowly rotating "Z" potentiometer, observe the ammeter reading close to 4 ma.

When the liquid level in the limited time, use a screwdriver slow rotation "S" potentiometer, observe 20 ma current meter reading is close.

So above 2 to 3 times repeatedly, until zero and range are accurate 20 ma ma and 4, respectively.

After adjust, should tighten the lid of the transmitter.

Eight, appearance and installation method:

Appearance:

Cable type liquid level transmitter consists of shell, amplifier, terminal blocks, helmets, hollow wire, etc, according to the needs of the user can choose a pointer table, LCD display meter.

Installation method:

1, choose easy to place for installation operation and maintenance;

2, shall be installed as far as possible away from the vibration source;

3, should be far away from heat source as far as possible;

4 when inputting type liquid level transmitter installation, cable, metal probe to sink to the bottom of the container.

Nine, note:

1, who supply products with instruction manual and the certificate of approval, including product number, technical parameters, production date, etc., please check carefully, lest use wrong.

2, connect the power supply shall be in strict accordance with my company connection wiring instructions.

Found in 3, the use of exception, should turn off the power and stop using, check, or directly to our technical department.

4 should be restored the original packaging, transportation, storage, stored in a cool, dry and ventilated warehouse.

Ten, selection of details:

1, indicate the measuring range (level of), for some special medium, indicate the density of the medium.

2, type selection, attention should be paid to contact with the product of the measured medium material compatibility, for special medium, can be customized.

More than 3, the product installation in the thunderstorm area, the order should be marked "lightning", recommend that users install against lightning protection device at the scene, and make sure products and power grounding.

4, about the selection of gas leading cable length: general than the actual level of 1 ~ 2 meters long.

Eleven, selection of coding:

Twelve, design selection and ordering information:

1, model specifications: ZW - DB500 series;

2, the name of the measured medium, medium density;

3, instrument measuring range: can also be referred to as the nominal length;

4, work pressure, work under pressure;

5, working temperature: measuring the temperature of the liquid;

6, material requirements: liquid material;

7, whether matching supply flange, bolts, nuts, valves, fittings, such as sealing washer;

8, flange standard: nominal size of the flange, 3/4 ", DN25, (, DN80, DN100, etc;

9, special requirements: before ordering, please indicate in detail.

After-sales service commitment:

1, our company sold by liquid level transmitter series products within twelve months appear quality problem, is responsible 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, after the warranty period appear quality problem, my company is responsible for the maintenance, charge damage parts cost.

5, such as user 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.