Intelligent flange type pressure transmitter

ZW3851 seriesIntelligent flange type pressure transmitterOf key raw materials, components and parts are imported or joint venture, the whole machine after assembled and tested strictly, it has advanced design principle, complete specifications, installation convenient use, etc.Due to the appearance on the total integration of the current domestic Z is popular, and widely used two kinds of transducer (3051 with yokogawa EJA rosemount) the structure of the advantages, for the users to have the feeling that find everything new and fresh, at the same time with the traditional series of products can be directly replace on installation, strong commonality and replace ability.

Second, the working principle:

ZW3851 series intelligent flange type pressure transmitter is by measuring the principle of the diaphragm and on both sides of the insulation slices on the electrodes of a capacitor.When inconsistent 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, after temperature compensation and the linear correction, converted into a standard electrical signals.

Applications:

ZW3851 series intelligent main body structure of the flange type pressure transmitter and pressure transmitter is the same, in order to adapt to different installation requirements, this series transmitter has many forms of remote transmission device for the user to choose from.The products are widely used in petroleum, chemical, electric power, food, paper making, municipal engineering and other industries.

Four, the main features:

1, indicating novel, intuitive reading and eye-catching, observing the direction of the indicator can be based on user need to change the point of view.

There were 2, simple structure, moving or elastic element, so stay on sex is extremely high, little maintenance.

3, installation is convenient, built in especially shows the characteristics of the structure, without any special tools.

4, 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.

5, wide range of USES;Suitable for high temperature and high pressure, strong corrosive medium level measurement.

6, large measuring range, not restricted by storage tank height.

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

8, have the ability to safety explosion protection and isolation and can be applied to all kinds of dangerous sites.

9, with anti blocking design can be realized to paste medium level measurement.

10, fine unique zero, full range, nonlinear compensation, guarantee conditions of use within the scope of the precision, good stability for a long time.

Five, the technical parameters:

1, the output signal: 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)

2, power supply: 12 ~ 45 v DC.

3, load characteristics:

Power supply: < 0.005% output range/V;

Load impact: when power supply stable, without load effect;

Accuracy of measurement, calibration range of plus or minus 0.1%, plus or minus 0.2 standard accuracy is + / - 0.2%, if choose other precision in the model selection of the order, please specify;

Quantity than: now or 100-1;

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, do not need to preheat.

4, work environment: the environment temperature - 29 ~ 93 ℃ (analog amplifier);

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

- 29 ~ 65 ℃ (with display meter);

Environmental humidity 0 ~ 95%.

5, protective features: protection IP65;

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

The Ann model Exia II CT5.

7, static pressure influence: zero error: plus or minus 0.5% zui limit, in a wide range for 32 mpa in the pipes under pressure by zero calibration.

Zui 8, the electromagnetic radiation: 0.05% value in a wide range, accept radiation frequency 27 ~ 500 MHZ, test voltage 3 v/m.

9, indicator (%) : LCD digital display accuracy + / - 0.2%.

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

11, installation location: diaphragm installed vertically, not likely to produce the zero error of less than 0.24 KPa, but can be modified by zero.

12, heavy volume: 3.9 Kg (not including attachments).

Six, the application process matters needing attention:

1, measure the liquid pressure, flange level transmitter installation location should avoid the impact of the fluid (water hammer), in order to avoid the sensor damage of overpressure.

2, when the winter freezing in single flange level transmitter, anti-freezing measures according to the required in outdoor transmitter, without pressure, fluid due to the icing volume expansion in the mouth, lead to the damage of sensors.

3, connection, cable through the waterproof connector (attachment) or round tube and screw down the sealing nut, such as in case of rain through the cable leakage into the transmitter inside the shell.

4, when measuring the liquid pressure, pressure pipe side should be open in the process, in order to avoid precipitation product residue.

5, to prevent fluid of flange transmitter and corrosive or overheating of media contact, prevent the dross in intraductal deposit;

6, when measuring the pressure of gas, pressure mouth will open at the top of the process piping, flange level transmitter and also will be installed in the upper part of the process pipe so that the deposition of liquid pipelines of rapid injection to the process.

7, to pay attention to the guide of sensor pressure tube to install where small temperature fluctuations;

8, measuring, steam or other high temperature medium to connect with the buffer tube (coil) such as condenser, should not make the transmitter operating temperature more than limit.:

Seven, selection of code:

Eight, design selection and ordering information:

1, the pressure transmitter type according to the selection of 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, if the transmitter should be used in vacuum and high temperature occasion, special label when you order.

5, contact medium the o-type sealing ring material with rubber, fluorine rubber, etc.

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

After-sales service commitment:

1, our company sold by wei instrument product quality problem within 12 months, 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.