Flange mounted differential pressure transmitter

I. Product Overview:

ZWA210A/220A series flange mounted differential pressure transmitter adopts advanced microprocessing technology and digital communication technology. In addition to all the functions of conventional intelligence, it also has a series of enhanced functions, such as automatic zero adjustment, remote in-situ control parameter viewing and password lock adjustment of control parameters, etc. At the same time, through field bus HART protocol, remote parameter setting, remote control, self-diagnosis and other functions are carried out.

2. Fieldbus communication capability:

The field bus of ZWA210A/220A series flange mounted differential pressure transmitter is a bidirectional digital communication system. It is an innovative technology to configure instrument control system. It is also a promising renewal product to replace the standard 4-20mA analog communication widely used in field instruments.

Two Fieldbus modes, FOUNDATION? Fieldbus low-voltage mode and PROFIBUS PA equipment, are provided to achieve the collaboration between Astor and other suppliers. In software aspect, ZWA210 series uses two AI function blocks to calculate differential pressure and static pressure, thus realizing flexible instrument configuration.

3. Small lightweight design:

ZWA210A/220A series flange-mounted differential pressure transmitter reduces the weight of this model to half of the original model due to the use of ASIC amplifier design to reduce packaging, as well as the construction of diaphragm box and the miniaturization of flange. ASIC design not only reduces the number of parts, but also improves the reliability of the amplifier.

4. Application occasions:

ZWA210A/220A series flange-mounted differential pressure transmitters are used to measure the flow, liquid level, density and pressure of gases, liquids and vapors, and then convert them into current signal output of 4-20 mADC. ZWA210A/220A can also communicate with each other through BRAIN or CENTUM CS/uXL or HART275, through which they can be set up and monitored.

V. Main characteristics:

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

2. Digital accuracy: +(-) 0.2%;

3. Simulation accuracy: +(-) 0.75% +(-) 0.1% F.S.

4. Full performance: +(-) 0.25F.S.

5. Stability: 0.25% for 60 months;

6. Range ratio: 100:1;

7. Measurement rate: 0.2S;

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

9. Process connection is compatible with other products to realize measurement.

10. The only sensor in the world that uses H-alloy sheath (technology) achieves excellent cold and thermal stability.

11. Intelligent transmitter with 16-bit computer;

12. Standard 4-20mA, with HART protocol based digital signal, remote control;

13. Support the upgrading of fieldbus and field control technology.

6. Technical parameters:

1. Output signal: 4-20MA.DC two-wire system (analog) two-wire system 4-20mA DC signal is superimposed with digital signal, and the user chooses linear or square output. (Intelligence)

2. Power supply: 12-45V.DC;

3. Load characteristics:

Power supply effect: <0.005% output range/V;

Load effect: When the power supply is stable, there is no load effect.

Measurement accuracy: Adjust the range of measurement (+0.1%) and (+0.2) the standard accuracy is (+0.2)%. If you choose other accuracy, please specify when ordering.

Range ratio: 10:1 or 100:1;

Damping: Usually it can be adjusted between 0.1 and 16 seconds. When inert liquid is filled or remote transmission device is used, the time constant will increase.

Start-up time: <2 seconds, no preheating.

4. Working environment: ambient temperature - 29-93 C (analog amplifier);

- 29-75 C (digital/intelligent amplifier);

- 29-65 C (with display head);

The ambient humidity is 0-95%.

5. Protection characteristics: protection capability IP65;

6. Explosion-proof type: Exd II BT4-6 of explosion-proof type; Exia II CT5 of intrinsically safe type.

7. Static pressure effect: Zero error: +0.5% Zui large range limit, for 32 MPa under pipeline pressure through zero correction.

8. Electromagnetic radiation effect: 0.05% Zui large range value, receiving radiation frequency 27-500 MHz, test field strength 3V/m.

9. Indicator (%): LCD digital display accuracy (+0.2%).

10. Vibration effect: 200 Hz vibration in any direction, +0.05%/g.

11. Installation position: The diaphragm is not installed vertically, which may cause zero error less than 0.24KPa, but can be corrected by zero adjustment.

12. Weight: 3.9Kg (excluding accessories).