Explosion-proof and pressure-insulating/pressure transmitter

I. Product Overview:

ZW3351AP series explosion-proof and pressure-insulating/pressure transmitter is a new type of transmitter produced by importing advanced technology and equipment from abroad. The key raw materials, components and components are imported. After rigorous assembly and testing, the whole machine has the characteristics of advanced design principle, complete varieties and specifications, simple installation and use. Because the appearance of the model fully integrates the structural advantages of two kinds of transmitters which are popular and widely used in China, it gives users a fresh sense.

II. Working Principle:

ZW3351AP series explosion-proof adiabatic pressure/pressure transmitter measures two kinds of pressure of medium into high and low pressure chamber, which acts on the isolation diaphragm on both sides of the delta element (i.e. sensitive element), and is transmitted to both sides of the measuring diaphragm through the isolator and filling liquid in the element. A capacitor is formed by measuring the diaphragm and the electrodes on both sides of the insulating sheet. When the pressure on both sides is inconsistent, the displacement of the diaphragm is proportional to the pressure difference, so the capacitance on both sides is different, and the signal is converted into a signal proportional to the pressure through oscillation and demodulation. The working principle and differential pressure transmitter are the same, but the difference is that the pressure of the low pressure chamber is atmospheric pressure or vacuum.

3. Application occasions:

One side of ZW3351AP series explosion-proof insulation/pressure transmitter receives the measured insulation signal, the other side is enclosed into a high vacuum reference chamber, and then converts it into 4-20mA.DC signal output. It can measure the absolute pressure of degassing system, distillation tower, evaporator and crystallizer.

Fourth, main characteristics:

1. Super measurement performance for pressure, differential pressure, liquid level and flow measurement;

2. Digital accuracy: +(-) 0.05%;

3. Stability: 0.25% for 60 months;

4. Range ratio: 100:1;

5. Measurement rate: 0.2S;

6. Miniaturized (2.4kg) stainless steel flange, easy to install;

7. Process connection is compatible with other products to achieve ideal measurement.

8. The sensor (technology) with H-alloy sheath has achieved excellent cold and thermal stability.

9. Using 16-bit computer;

10. Standard 4-20mA, with HART-based digital signal, remote control supports upgrading to fieldbus and field control technology.

Technical parameters:

1. Targets: liquids, gases and vapors;

2. Measurement range: 0-1.6-10 Mpa;

3. Output signal: 4-20mA DC (special for four-wire system); 220V AC power supply, 0-10mA DC output;

4. Power supply: 12-45V DC, generally 24V DC;

5. Load characteristics: related to power supply, with load capacity at a certain power supply voltage; the relationship between load impedance RL and power supply voltage Vs is: RL < 50 (Vs-12);

6. Indicator table: pointer linear indicator 0-99% calibration and LCD liquid crystal display;

7. Explosion-proof grade: a: Exd II BT5 or Exd II CT6; b: intrinsically safe type (Exia II CT6 or Ex IB II CT6);

8. Range and Zero: External continuous adjustable;