Intelligent high static pressure differential pressure transmitter

ZW3851HP seriesIntelligent high static pressure differential pressure transmitterIs the introduction of foreign advanced technology and equipment production of new type of transducer, the key raw materials, components and parts are imported, the whole machine after assembled and tested strictly, this product has the advanced design principle, the variety specification is complete, installation convenient use, etc.Due to the aircraft appearance on the total integration of the current domestic zui is popular, strong commonality and replace ability.For the continuous improvement of the domestic automation level and the development, this series of products in addition to the design cabinet and delicate, more has introduced HART field bus protocol of intelligent function.

Second, the working principle:

ZW3851HP series intelligent high static pressure differential pressure 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.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.

Applications:

ZW3851HP series intelligent high static pressure differential pressure transmitter is used to work in high pressure environment measure liquid, gas or liquid level, flow and pressure of steam, then into 4 ~ 20 ma DC signal output.Intelligent communication with HART hａnd operator, through its setting, monitor or with upper unit into the scene monitoring system.

Four, the main features:

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

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

3, stability: 0.25% 60 months;

4, range: 100:1;

5, measuring rate: 0.2 S;

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

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

8, the world's only USES the H alloy sheath of sensors (technology), achieved good cold and hot stability;

9, using 16-bit calculation;

10, standard 4-20 ma, with digital signal based on HART protocol, the remote control support to field bus and upgrade based on the technology of field control.

Five, the technical parameters:

1, use object: liquid, gas and steam;

2, measuring range: 0-0.4 ~ 2.5 MPa;

3, the output signal: 4 ~ 20 ma DC (special for four wire system);220 vac power supply, 0 ~ 10 madc output;

4, power supply: 12 ~ 45 VDC, general is 24 VDC;

5, load characteristic: related to the power supply, when a power supply voltage on load capacity;RL load impedance and voltage Vs relation is: RL 50 or less (v - 12);

6, indicator: pointer linear indication 0 ~ 99% scale and the LCD liquid crystal display;

7, explosion-proof grade: a: flameproof (Exd Ⅱ BT5 or Exd Ⅱ CT6);B: this Ann model (Exia Ⅱ CT6 or Exib Ⅱ CT6);

8, range and zero: external continuous adjustable;

9, plus or minus migration: zero after positive transfer and negative transfer, range, measurement range, of the absolute value of the upper limit and lower limit are less than 99% of the measurement range limit.Zui dazheng zui small adjustment range migration quantity of 500%;Zui large amount of negative transfer of zui small adjustment range of 600%;

10, temperature range: operating temperature range: - 20 ~ + 88 ℃;