Far eastone double flange level transmitter

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Far eastone double flange level transmitter can accurately measure differential pressure, and conver…

Products overview:

Far eastone ZW3051LDP series double flange level transmitter is the introduction of foreign advanced technology and equipment production of the new transmitter, liquid level meter key raw materials, components and parts are imported, the whole machine after assembled and tested strictly, level gauge has the advanced design principle, variety complete specifications, installation convenient use, etc.Because of the level model appearance on the total integration of the current domestic z is popular, for the users to have the feeling that find everything new and fresh, strong commonality and replace ability.

Mainly used for the measurement of the following situations: under the high temperature of viscous medium easy to be crystallized media containing solid particles or sedimentation of suspended material medium corrosive or toxic medium can eliminate guide pipe leakage pollution environment, the phenomena of using spacer can be avoided, because of the measuring signal is not stable, needs to add spacer often tedious work.For accurate measurement interface and remote transmission device can avoid different instant media density fusion, so that the measured results truly reflect the actual situation of process changes.Clean health demanding occasions such as food, beverage and pharmaceutical industry production, not only requires the transmitter medium contact conform to the hygiene standards, and should be easy to wash, to prevent the different mass media cross contamination.

Core components: a 16 bit single chip microcomputer, and its powerful function and the good quality of high speed computing power to ensure that the transmitter.The overall design framework focusing on reliability, stability, high precision and intelligence, satisfy the requirement of the growing industrial field application.To this end, the application of digital signal processing in software technology, make it has good anti-interference ability and stability of the zero point, stable and has zero point for automatic tracking capabilities (ZSC) and automatic temperature compensation ability (TSC).Powerful function without hand operator interface, to ensure the good interactive.Digital LCD display meter can display three kinds of pressure, temperature, current physical quantities and 0 ~ 100% simulation instructions, keystrokes can easily in the top force source under the condition of complete moving zero and range setting, the basic parameters such as damping set set, but also to the transducer calibration, greatly has made the scene debugging.Optional communication function, the realization of digital signal remote transmission.Optional HART communication function, and through the upper machine or hand operator to control the remote transmitter or configuration again.

Second, the working principle:

ZW3051LDP series double flange remote transmission principle of measurement of the liquid level transmitter is when two of the measured medium pressure ventilation with high and low pressure chamber, two functions in the delta components (i.e., sensitive element) on either side of the segregation on the diaphragm, through spacer and components on both sides of the filling liquid to measure the diaphragm.Liquid level transmitter is by measuring diaphragm and on both sides of the insulation on the electrodes of a capacitor.When we have different pressure on both sides, to cause measuring diaphragm displacement, the displacement and stress is directly proportional to the difference, so both sides capacitance range, through the link of oscillation and demodulation, is converted into is proportional to the pressure signal.

JiYiDuan allowed pressure liquid, the other end songs in phase, according to the principle of hydrostatics, are:

PB = PA + H rho g (2-1)

Type: H - liquid height;

Rho - density measured medium;

G - measured the local acceleration of gravity.

By type (2-1) available:

Δ P = PB - PA = H rho g

In general, the density of the measured medium and the acceleration of gravity is known, as a result, the differential pressure gauge measured the differential is proportional to the liquid height H, thus the measurement of the altitude of the liquid into the measurement of differential pressure problems.

Three, double flange level transmitter measuring liquid level diagram:

Applicable occasions:

Far eastone ZW3051LDP series double flange level transmitter can avoid directly measured medium and transmitter isolation membrane contact, this method is applicable to the following several ways:

1, the sensitive element of transmitter measured medium corrosion were role;

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

3, the measured medium has suspended solids or high viscosity medium;

4, the medium to be tested by the lead pipe at the same time easy to curing or crystal;

5, change must strictly to purify the measuring head measured medium;

6, measuring head must keep health, it is forbidden to pollution.Using the object: corrosive or viscous liquid.

Note: vacuum circumstance unfavorable use remote transmitter.

Five, the main features:

1, the super performance measurement for pressure, differential pressure, liquid level, flow measurement;

2, digital precision: + (-) 0.05%;

3, the simulation precision: + + (-) (-) 0.75% 0.1% F.S;

4, the whole performance: + 0.25 F.S (-);

5, stability: 0.25% 60 months;

6, span ratio: 100:1;

7, volume rate: 0.2 S;

8, miniaturization (2.4 kg) stainless steel flange, easy to install;

9, process connection compatible with other products, the realization of ideal measurement;

10, with H alloy sheath of sensors (technology), and achieved excellent cold and hot stability;

11, using 16 computer intelligent transmitter;

12, standard 4-20 ma, with digital signal based on HART protocol, remote control;

13, support to the field bus and upgrade based on the technology of field control;

Six, the technical parameters:

Output signals: 4 ~ 20 ma DC two wire (simulated)

Two wire 4 ~ 20 ma digital signal superimposed on the dc signal, the linear output or prescribing selected by the user.(smart);

Power supply: 12 ~ 45 v DC;

Power supply: < 0.005% output range/V;

14, to avoid directly measured medium in transmitter isolation diaphragm contact provides a reliable measuring method;

Resistance, : usually can be adjustable between 0.1 ~ 16 seconds, when the pump inert liquid or remote transmission device, the time constant will increase;

Start time: < 2 seconds, without preheating;

Working environment: the environment temperature - 29 ~ 93 ℃ (analog amplifier);

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

- 29 ~ 65 ℃ (with display meter);

Environmental humidity 0 ~ 95%;

Protective features: protection IP65;

Explosion-proof type, flameproof Exd II BT4-6;

The Ann model Exia CT5 II;

Static effects: zero error: plus or minus 0.5% z limit value in a wide range, for 32 mpa in the pipes under pressure by zero correction;

Electromagnetic radiation effects: 0.05% z value in a wide range, accept radiation frequency 27 ~ 500 MHZ, experimental field 3 v/m;

Indicator (%) : LCD digital display precision of + / - 0.2%;

200 hz vibration impact: any direction vibration, plus or minus 0.05% / g;

Installation location: diaphragm is not installed vertically, the zero error of less than 0.24 KPa may be produced, but can be modified by zero;

Weight: 3.9 Kg (not including attachments).

With remote transmission device, liquid level transmitter is applicable to the following conditions:

1, you need to high temperature medium from the transmitter.

2, corrosion transmitter sensitive element for measuring medium.

3, due to environment or measured medium temperature change and solidifying or crystallization.

4, replace the measured medium need strictly to purify the measuring head.

5, suspending liquid or high viscosity medium.

6, measuring head must maintain clean sanitation.

7, sealing pressure container.

Eight, matters needing attention and routine maintenance:

1, using a new double flange differential pressure transmitter, to check the flange in the diaphragm liquid adequacy (how many of each production electrode internal charging different requirements), such as too little, should be returned to the factory maintenance.

2, for never immersed in solution of diaphragm and dry on the sensor for a long time, before use to need to look at is damaged, the purpose is to make after compression, sensor diaphragm rupture, causing the oil mixed with measuring medium.

3, daily use flange removal should be used when not in use cases, avoid by all means will be diaphragm bare outside.

4, need not can do put for a long time, often use zui good save in the fluid of the electrode to protect, but to soak activated before use.

5, measurement of acid alkali will greatly reduce the electrode life, so if you need frequent measurement of acid alkali zui good special acid alkali resistant diaphragm of choose and buy.

6, membrane cleaning water, water should not be too big, do not use scrubbing brush iron or other metal.

7, flange to should take put down gently, the diaphragm is very fragile, so as not to knock against.

Nine, selection considerations:

1, the model selection according to specification table according to the need to make sure.

2, selection of specifications in the table Numbers, symbols must be fill in clear, accurate.

3, if you have positive and negative migration, must indicate the migration amount value.

4, differential pressure transmitter to match three valve group, need to be indicated separately.

5, when far eastone transmitter of choose and buy, should also be based on different remote flange selection table according to the need to be sure.

6, if the remote transmitter should be used in vacuum and high temperature occasion, special label when you order.

7, contact medium type O sealing ring material is rubber, fluorine rubber, etc.

8, no special note, the factory when the liquid silicone oil.

Eleven, selection of coding:

Twelve, design selection and ordering information:

1, working pressure also depends on the selection of the specifications of the flange.

2, remote transmission device working temperature, the choice of types of liquid filling.

3, far eastone pressure transmitter is one side of the remote device by temperature effect, the output generated by the change.

4, static pressure and temperature, were measured in the maximum range.

5, far eastone pressure transmitter on one side of the capillary length is 1.5 meters, commonly length shoulds not be more than 3 m agreement to special cases.

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.