Single flange level meter

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Single flange level gauge is used to prevent the pipeline in the container medium directly into the …

Productoverview:

ZW3051L series Single flange level meter Is the introduction of a new type of transmitter foreign advanced production technology and equipment, key raw materials, components and parts are imported from the machine, after strict assembly and testing, the product has advanced design principle, complete specifications, convenient installation and operation etc.. Because this model appearance completely fused at home Zui popular, two transmitters and widely used (Ross and Henghe 3051 Monte EJA) structure advantages, allowing users to find everything fresh and new feeling, and directly replace traditional products and installation, strong versatility and ability to substitute. For the continuous improvement and development for domestic automation level, this series of products in addition to the design of small and exquisite, launched more intelligent functions with HART Fieldbus protocol.

Two, work principle:

ZW3051L series <strong> single flange level gauge</strong> principle is measured by the diaphragm and the insulation sheet on both sides of the electrode on the various components of a capacitor. When the pressure is inconsistent, resulting in measuring diaphragm displacement, the displacement and the pressure difference is proportional to the capacitance on both sides from it, through stages of oscillation and demodulation, signal is converted into proportional to the pressure, and then after the temperature compensation and linearity correction, converted into standard electric signal.

Three, application:

ZW3051L series <strong> single flange level meter</strong> of the main structure and the pressure transmitter is the same, in order to adapt to different installation requirements, the transmitter has a variety of forms for users to choose the remote device. The products are widely used in petroleum, chemical, electric power, food, papermaking, municipal engineering and other industries.

1, viscous medium under high temperature;

2, crystallizing media;

3, precipitation medium with solid particles or suspended solids;

4, strong corrosive or toxic medium;

Can eliminate the pipe leakage phenomenon of the pollution of the environment; to be isolated by liquid, because the measurement signal is not stable, tedious work often supplement the isolation liquid.

5, continuous measurement of interface and density;

The remote device can avoid different instant mixing medium, the actual situation which makes the measurement results reflect the process of change.

6, cleaning requirements of high places;

Such as food, beverage and pharmaceutical industry production, not only requires the transmitter contact media site to meet health standards, and should be easy to wash, to prevent cross contamination of different mass media.

Four, main features:

1, indicating novel, intuitive readings, eye-catching, observe the direction of the indicator according to user needs to change the angle.

2, simple structure, without any movable or elastic element, so stay on very little maintenance.

3, convenient installation: the built-in structure especially show this characteristic, without any special tools.

4, easy to adjust the zero range, two potentiometers can be arbitrary zero migration or range in level detection range change, two adjustments do not affect each other.

5, widely used; liquid level measurement is suitable for high temperature and high pressure and corrosive medium.

6, large measuring range, from the height of the storage tank.

7, indicating mechanism and the measured medium is completely isolated, good sealing performance, high reliability, safe use.

8, with explosion-proof and explosion-proof isolation capability, can be applied to a variety of dangerous places.

9, with anti blocking design can realize the measurement of the paste medium level.

10, fine unique zero and full range, nonlinear compensation, guarantee instrument use conditions within the scope of the precision, good long-term stability.

Five, technical parameters:

1, the output signal: 4 ~ 20MA.DC two-wire (Analog) two-wire 4 ~ 20mA DC superimposed on the signal digital signal, linear or square output selected by the user. (intelligent)

2, power supply: 12 ~ 45V.DC.

3, load characteristics:

Effect: <0.005% power output range /V;

Influence of load: stable power supply, no load effect;

Measuring accuracy: adjust the range of + 0.1%, + 0.2 to + 0.2% standard precision, if other precision please specify in the order selection;

Range: 10:1 or 100 to 1;

Damping: usually in 0.1 to 16 seconds between the adjustable, when filling liquid with inert or remote transmission device, the time constant will increase;

Start time: <2 seconds, without preheating.

4, the working environment: the environment temperature of -29 to 93 DEG C (analog amplifier);

-29 ~ 75 C (digital / intelligent amplifier);

-29 to 65 DEG C (with display gauge);

The environmental humidity of 0 ~ 95%.

5, protective properties: protective ability of IP65;

6, explosion-proof type: flameproof type Exd II BT4-6;

This type of Exia II CT5.

7, static pressure zero error: + 0.5%zui large range limit value for 32MPa in the pipeline under pressure by zero corrected.

8, the effects of electromagnetic radiation: 0.05%zui large range value, the radiation frequency is 27 ~ 500MHz, the test field 3V/m.

9, indicator (%): LCD digital display precision + 0.2%.

10, 200Hz: influence of vibration in any direction vibration, + 0.05%/g.

11, the installation position of diaphragm: not installed vertically, may produce less than 0.24KPa by adjusting the zero error, but zero correction.

12, weight: 3.9Kg (not including attachments).

Six, maintenance procedures:

1, structure:

Dan Falan differential pressure transmitter, liquid level transmitter by capillary and flange sealing diaphragm. The sealing diaphragm prevents the medium in a pipeline directly into the differential pressure transmitter, between it and the transmitter is filled with liquid (usually by using silicone oil) connected to the capillary tube, when the diaphragm compression of micro deformation, deformation or displacement frequency transfer to the transmitter through the capillary liquid, converted into an output signal by the transmitter after treatment.

2, visual inspection:

A, check: check the flange and the flange connecting part of the seal device is good; the flange and the capillary, capillary and the transmitter connecting part and the capillary itself is liquid leakage; flange diaphragm is no deformation, damage, corrosion, scaling and other adverse conditions.

The B transmitter, check: check the transmitter case without damage, corrosion and other faults, found problems in a timely manner.

3, acceptance:

A, open the transmitter cover, check the sealing ring is damaged, if the damage to the timely replacement; check the circuit boards and other components is good.

B, check the transmitter terminal case is good.

C, disconnect the power to remove the wiring, insulation resistance check, use 500V megohmmeter insulation resistance check transmitter terminal and between the shell and the resistance value should be greater than 20M.

4, Dan Falan level transmitter debugging check

A in order to ensure the accuracy of measurement of single flange level transmitter transmitter, can not open the capillary, so check to check the transmitter together with the flange; before installation, available pressure analog signals and HART communication device check.

B, zero and span adjustment steps: adjust the zero and span output, the allowable error range. The continuous pressure, with a range of 0%, 25%, 50%, 75%, 150% pressure check, when the pressure is stable after the current record shows the standard current meter value and return error check. If the parity error exceeds the allowable error range, re check.HART operation with the adjustment, see the corresponding adjustment method using HART.

4, installation:

A, remote installation of flange:

High and low pressure on both sides of the flange should be properly installed, not anti loaded; in order to reduce the effect of environmental temperature, the high and low pressure side of the capillary bundle together, and fixed to prevent the effects of wind and vibration (the long capillary part shall be rolled together; not fixed) injury with liquid film on the surface of. Do not twist, squeeze the capillary, don't put too much pressure on it.

B, the transmitter body installation: use the mounting bracket, the transmitter body installed on a 50mm diameter pipe.Can be horizontal and vertical installation of piping piping installation.

5, matters needing attention:

A, the measurement chamber four fastening bolts, and the connecting part of the capillary chamber fixing screws must not be loosened to prevent fluid leakage, seal, instrument damage caused by.

B, the wiring should avoid large capacity transformer, motor or power supply interference source; the wiring should open the power supply interface of the dustproof plug; threaded part should be waterproof (waterproof processing Zui using silicone sealant hardening Series); to prevent interference, signal cable should avoid the same root canal cable protection and other power cable penetration; for explosion-proof instrument, to ensure the explosion-proof performance, wiring must be in accordance with the relevant provisions.

Seven, maintenance:

The following is our single flange level transmitter maintenance introduction.

1, flange type liquidometer occurs in winter when frozen, the transmitter installed in the outdoor antifreezing measures must be taken to avoid the pressure inside the mouth, the freezing liquid due to volume expansion, leading to sensor damage.

2, when wiring, cable through the waterproof connector (accessories) or around the pipe and tighten the sealing nut, to prevent rainwater seeps into the shell through the cable transmitter.

3, in the measurement of gas pressure, pressure taking port to open at the top of the pipe flow, and the upper flange level transmitter should be installed in the pipeline so that the deposition process of liquid injected into the pipeline in the process of rapid.

4, Dan Falan liquid level transmitter for measuring steam or other high temperature media, should be connected with the buffer tube (coil) and condenser, should not make the transmitter working temperature exceeds the limit.

5, Dan Falan must pay attention to the sensor level transmitter tubing should be installed in a small temperature fluctuation place.

6, the measurement of liquid pressure, the installation position of flange level transmitter should avoid the impact of liquid (or water hammer), so as to avoid overvoltage damage sensor.

7, single flange level transmitter in the measurement of liquid pressure, pressure taking port should be opened in a side flow pipe, to avoid slag deposition precipitation.

8, to prevent the liquid medium contact flange transmitter and corrosive or overheating, but also to prevent the deposition of dross in the duct.

Eight, When using the matters needing attention:

1, in the measurement of gas pressure, pressure taking port to open at the top of the pipe flow, the upper and the single flange level transmitter to device in the pipeline so that the liquid flow into the rapid accumulation process in the pipeline.

2, when wiring, cable through the waterproof discussion (Annex) or around the tube and screw nut tightly sealed, to prevent rainwater through cable leak into the transmitter shell.

3, Dan Falan has frozen in the summer when the liquid level transmitter, the transmitter device must be used in outdoor anti freezing way, to prevent the pressure inside the mouth of the liquid due to ice volume shrinkage, leading to the sensor failure.

4, the measurement of liquid pressure, flange level transmitter device status should prevent liquid (water hammer blow is the scene), lest destroy an overvoltage sensor.

5, Dan Falan to watch the sensor level transmitter tubing to device in temperature stable small spaces.

6, single flange liquid steam or other transmitters to measure low temperature medium, is required to be connected with the buffer tube (coil) and condenser, the task of the transmitter temperature exceeds the limit.

7, single flange level transmitter in the measurement of liquid pressure, pressure should be open in front of process pipeline, to prevent the accumulation of slag accumulation.

8, to avoid the media war with corrosive liquid flange transmitter or overheating, but also to avoid the accumulation of garbage in the duct.

Nine, the selection of encoding: