Radio-frequency admittance level meter

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Radiofrequency admittance level meter is a new type of level measuring instrument designed and manuf…

Products overview:

ZW - L2000D seriesRf admittance level meterUsed for continuous material level measurement, the product is applied in industrial and mining field, suitable for most applications, instrument consists of a circuit unit a explosion-proof enclosure and lever or rope type of sensors, sensor has a variety of types of optional, continuous material level measurement instrument for, products are widely used in many kinds of working condition of the scene, suitable for most applications.Instrument consists of a circuit unit, a set of explosion-proof enclosure and lever or rope type of sensors, sensor has a variety of types are optional.The instrument is optional or fission installation as a whole.

Second, the working principle:

ZW - L2000D series rf admittance level meter is a kind of developed from the condenser, hanging applicability broader, more reliable, more accurate, a new type of material level control technology, the capacitive material level technology upgrade.So-called rf admittance, the meaning of the admittance to the reciprocal of electrical impedance in, its element by resistive, capacitive component, the perceptual component integrated, and radio frequency or high frequency radio spectrum, so the radio frequency admittance can be understood as admittance is measured with a high frequency radio waves.Instrument, instrument of the sensor and filling walls and forming admittance values measured medium, level changes, admittance values change accordingly, circuit unit convert measurement admittance values into material level signal output, to achieve material level measurement.

Applications:

1, conductive, insulation liquid.............................................Chemical, oil field, water and wastewater treatment;

2, conductive, insulation slurry.............................................Paper making, pharmacy, water and wastewater treatment;

3, powder: grey, powder................................................Power plant, metallurgy, cement;

4, grain, coal, food.............................................Power plant, metallurgy, food;

5, interface: different two liquids..............................Oil field, chemical industry.

Four, the main features:

ZW - L2000D series rf admittance level meter adopts the advanced rf admittance technology, overcome the capacitive material level switch cannot eliminate the influence of conductive hanging defects.Has the following features:

1, versatility, suitable for various occasions, particles can be detected, fly ash, conductive, non conductive liquid, viscous material;

2, adhesion resistance circuit: advanced anti adhesion circuit design, can eliminate the adhesion of the material and produce false error signal;

3, losing electricity protection mode: low or high fault alarm.The scene is adjustable.

4, the material level meter reliable operation, the technical indicators have reached the level of international similar, widely used in liquid and slurry, dust, material level and the position of the two liquids alarm and control.In addition, the product adds to the field work status indicates, is a kind of high cost performance, stable and reliable level switch.

Five, the technical parameters:

1, the measuring accuracy, repeatability conductive medium conductive media. < < 2 mm to 50 mm;

2, temperature range: medium temperature to 200 ℃ ∽ + 800 ℃ (choose corresponding sensor probe);

3, environmental temperature: - 40 ℃ ∽ + 60 ℃ storage temperature 40 ℃ - ∽ + 60 ℃;

4, response time: 0.3 s or 0 ∽ 20 s continuous adjustable;

5, sensitivity: better than 0.3 PF;

6, temperature effect: every 10 ℃ + / - 0.05 PF;

7, signal output: DPDT relay output, two sets of normally open, normally closed contact, contact capacity: AC200V5A DC24V5A;

8, power supply: AC 220 v or 24 v DC.

9, the power consumption: 4 w;

10, protection level: IP66;

11, process connection: male G3/4 "and G1";

12, flange: GB - 9123-2000 (PN0.6 MPa;

13, sensor electrode:

Extension rod type z 3 m long and short z 0.4 m, the material of stainless steel 304 + PTFE plastic, ceramic, or agreed other requirements;

Cable type z 35 m long and short z 0.5 m, the material of stainless steel 304 + PTFE plastic or agreed by the other requirements;

Protect the electrode standard length is 100 mm or 300 mm material of stainless steel 304 + PTFE plastic, ceramic or agreed other requirements;

14, shell: type A plastic PBTP;Type B die-casting aluminum, epoxy resin coating;

15, cable entry hole: M20x1. 5 with plastic cable gland;

16, flame-proof ExdIICT5 standard.

Seven, installation instructions:

1, in the applications of non-metallic containers, nonlinear, should also be equipped with auxiliary reference ground level.

2, when using a soft rope naked probes used to measure the insulation material (e.g., pulverized coal bin), required to install the height of the header must be less than the length of the probe hard rod parts, ensure the hard rod part exposed pipe installation.To prevent the probe moving cause of short circuit in the warehouse.And installation of pipe and steel skeleton should be connected together.

Eight, installation requirements:

When sensor installation, need on-site set the reference electrode, such as metal cans wall conductor, then must ensure that the instrument shell keep good contact with the setting of reference electrode.If the container wall for insulator, watchcase must use a grounding conductor.

At the top of the installation:

Top mounted distancing himself from the liquid into the mouth, avoid when the feed liquid level fluctuation is bigger, in the process of measuring more than 3.6 m tank or container, need to choose soft cable, rf admittance level soft cable bottom fixed to a heavy hammer, avoid large sloshing into liquid soft cable.

Hard bottom bar type sensor is generally not fixed, special circumstances in the middle of the bottom or plus fixed support, cable type sensor to aggravate the hammer or anchor fixation.

Cable type probe installation

In the process of measuring more than 3.6 m tank or container, need to choose soft cable, rf admittance level bottom to soft cable fixed weight, avoid into liquid, soft cable shook greatly.

Nine, installation considerations:

1, the radio frequency admittance installation location not being too close to the mouth, otherwise, rf admittance level meter when the material is easy to receive fake echo.

2, rf admittance for the original coal cylindrical, VEGA should be installed in the cylinder radius in half, the sensor should be aimed at discharging port.

3, rf admittance model is needed for the different voltage grade are not identical, to ensure the personal safety and equipment in good condition, should be in the case of power wiring.

4, connection mode can be divided into two wire system, rf admittance level meter acquisition is 4-20 ma current signal, to prevent electromagnetic interference on site, ensure the accuracy of signal, should use shielded cable, shielding grounding cable end.

Eight, installation method.

1, with rod or cable out bucket tank liquid level measuring pole:

Note: sheath maerial or cable should avoid, into the mouth, and sheath maerial or ground line parallel to the silo wall.Distance between the warehouse wall thrown and 200 mm.
2, horizontal tank is measured with a coaxial agent very level:

Note: the bucket pot and non-metallic silo wall can use coaxial agent is measured.
3, with unicom measuring spherical tank liquid level:

Note: spherical tank and other irregular shape tanks are the unicom apparatus can be used for measurement.
4, with heavy cable-type agent powder or fine grain bin level:

Note: the agent should avoid inlet, when the silo wall is concrete sensor shell earthing terminal shall be reliable and concrete reinforced with wire connection.

Nine, selection of code:

Ten, electrode selection:

Note:1、PTFEFor ptfe;2, more than for the standard length, can according to user requirements production level gauge length.

Eleven, design selection and ordering information:

1, liquid level control device specifications;

2, measurement range;

3, working pressure, and temperature;

4, control device for material;

5, special requirements;

6, whether level device matching supply vessel flange, bolts, nuts, valves and fittings such as sealing washer, so that the correct selection.

After-sales service commitment:

1, my company the liquid level switch series of products are sold within 12 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.