The explosion-proof single flange level meter

• 

The appearance of the explosion-proof single flange level gauge on the integration of currently more…

Productoverview:

ZW3051L series The explosion-proof single flange level meter Is the introduction of a new type of intelligent 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 of the appearance of liquid level transmitter completely fused currently popular two transmitters and widely used (Ross and Henghe 3051 Monte EJA) structure advantages, allowing users to have find everything fresh and new feeling.

Two, work principle:

ZW3051L series <strong> explosion-proof single flange level meter</strong> is composed of 3051GP smart pressure transmitter with a capillary with stainless steel flange connection, through the installation of a pipeline or a container in the remote device senses the measured pressure, the pressure of the capillary filled silicone oil (or other liquid) is transmitted to the transmitter body, then from the main body of the transmitter within the delta chamber and an amplifying circuit board, the pressure or differential pressure conversion 4 ~ 20mA.DC signal output, and HART compliant manipulator with mutual communication, setting and monitoring.

Three, application:

ZW3051L series <strong> explosion-proof single flange level meter</strong> can avoid the measured medium directly and transmitter diaphragm contact, this measurement method is applicable to the following situations:

1, the medium is corrosive to the transmitter sensitive element;

2, needs to be measured medium and high temperature transmitter isolation;

3, measured in suspended solids or high viscosity medium medium;

4, measured by medium pressure tube at the same time easy solidification or crystallization;

5, the replacement of the measured medium need strict purification of measuring head;

6, the measuring head must maintain health, no pollution. Object: the use of corrosive or viscous liquid;

Note: vacuum situation should not use remote transmitter.

Four, main features:

1, one by one to simulate the "run" online examination, ensure the transmitter in ambient temperature, medium temperature and working pressure (including positive pressure or vacuum), stable and reliable work.

2, the "remote diaphragm structure dynamic surface, damaged the membrane cannot be overloaded; change accuracy does not occur after long time working.

3, the full penetration and rigid seal filling system structure, eliminate the occurrence of the oil leakage phenomenon.

4, the design of novel capillary components, the capillary reliableprotection, used in the field is not easy to break.

5, varieties, forms and sizes of various remote devices, as well as the rich filling liquid, can meet the needs of measuring various occasions.

6, can provide a variety of products with special needs, including high temperature, high vacuum, fast response and unequal length capillary (length less than 3 meters) remote pressure transmitter.

Five, intelligent features:

Single flange remote pressure transmitter is the extension and development of pressure transducer technology, according to the different proportion of liquid in different height to generate pressure principle of linear relationship, to achieve accurate measurement and transmission of oil and water, paste volume, liquid height and weight.

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.

Six, 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. (Intelligence)

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 effects: 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, vibration effects in any direction: 200Hz 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).

Seven, maintenance procedures:

1, structure:

Remote flange pressure type 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 the range of 0%, 25%, 50%, 75%, and 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 can not be fixed screw loose, to prevent leakage of liquid filled, 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 treatment using non hardening silicone sealant 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.

Eight, matters needing attention:

Remote flange pressure level meter used in the process should pay attention to consider the following:

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

2, in the remote pressure transmitter transmitter occurred in winter freeze, according to the transmitters installed in outdoor antifreezing measures must be taken to avoid the pressure inside the mouth, the freezing liquid due to volume expansion, leading to sensor damage.

3, 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.

4, remote pressure transmitter transmitter in the measurement of liquid pressure, pressure taking port should be opened in a side flow pipe, to avoid slag deposition precipitation.

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

6, 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.

7, remote pressure transmitter should pay attention to the sensor tube to be installed in a small temperature fluctuation place;

8, remote pressure 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.

Nine, the selection of encoding: