The intelligent pressure transmitter consists of two parts: intelligent sensor and intelligent electronic board. The intelligent sensor part includes: capacitive sensor, measuring diaphragm detection circuit, temperature sensor and temperature compensation circuit; the intelligent electronic board part includes: microcomputer controller It is composed of peripheral circuits to complete the conversion of pressure signal to 4 ~ 20mA dc. It is used to measure the pressure of liquid, gas or steam, and then convert the pressure signal into 4~20mA DC signal output. The intelligent pressure transmitter produced by Junyuan Automation can communicate with the HART Communicator, set it, adjust the pressure range, monitor or form an on-site monitoring system with the host computer, it is widely used in weak corrosive liquids in industrial pipelines , gas, steam measurement and control systems.
Intelligent pressure transmitter has reverse polarity and current limiting protection; laser adjustable resistance temperature compensation, wide range, anti-corrosion, suitable for a variety of media; strong overload and anti-interference ability, stable performance; unique display head design, can Optional analog and digital display head; zero point and full scale can be adjusted through the hand-held communicator, with a wide range of range migration.
Zero and span adjustment
The zero point and span adjustment of the transmitter can be adjusted on-site through the buttons of the transmitter itself; it can also be adjusted remotely through the handheld terminal. The specific method is: after adding the zero point pressure and stabilized, press and hold the Z and S keys at the same time (Z is zero-point adjustment, S is the range adjustment) and release it for 5 seconds, press the Z key for 2 seconds to adjust the zero point, add full-scale pressure and stabilize , press the S key for 2 seconds to adjust the full range. Note: The adjustment range of zero point calibration is ±8% of the pressure range, and the range of span calibration is 30% to 100% of the pressure range, which is continuously adjustable. After adjustment, close the sealing cap and tighten.
Features:
1. It has the ability of automatic compensation, which can automatically compensate the nonlinearity, temperature drift, time drift, etc. of the sensor through software. It can be self-diagnosed. After power-on, the sensor can be self-tested to check whether each part of the sensor is normal and make a judgment. Data processing is convenient and accurate, and data can be automatically processed according to internal procedures, such as statistical processing, removal of abnormal values, etc.
2. With two-way communication function. The microprocessor can not only receive and process sensor data, but also feedback information to the sensor to regulate and control the measurement process. It can store and memorize information, and can store the characteristic data, configuration information and compensation characteristics of the sensor.
3. With digital interface output function, the output digital signal can be easily connected with computer or field bus.
Analog Features:
1. High precision
2. The range and zero point are continuously adjustable externally
3. Good stability
4. Positive migration can reach 500%, negative migration can reach 600%
5. Two-wire system
6. Adjustable damping, overvoltage resistance
7. Solid-state sensor design
8. No mechanical moving parts, less maintenance
9. Light weight (2.5kg)
10. The whole series has a unified structure and strong interchangeability
11. Miniaturization (166mm total height)
12. The material of the diaphragm in contact with the medium is optional
13. Unilateral overpressure resistance
14. Low pressure cast aluminum alloy shell
Smart Features:
1. Super measurement performance for pressure, differential pressure, liquid level, flow measurement
2. Digital precision: + (-) 0.05%
3. Simulation accuracy: +(-)0.75%+(-)0.1%F.S
4. Full performance: +(-) 0.25F.S
5. Stability: 0.25% for 60 months
6. Turndown ratio: 100:1
7. Measurement rate: 0.2S
8. Miniaturized (2.4kg) all stainless steel flange, easy to install
9. The process connection is compatible with other products for optimal measurement
10. The world's only sensor with H alloy sheath (patented technology), achieving excellent cold and thermal stability
11. Smart transmitter with 16-bit computer
12. Standard 4-20mA, with digital signal based on HART protocol, remote control
13. Supports upgrades to fieldbus and field control-based technologies.
Eight characteristics:
1. Intelligent integrated design: integrates pressure signal acquisition, processing, display and output.
2. Micro-power dual power supply design, high reliability.
3. Has a unique dynamic automatic tracking temperature compensation function.
4. With software correction zero drift function.
5. Upper and lower limit alarm memory flash indication function.
6. The pressure full scale software setting migration function.
7. Low power self-diagnosis function.
8. With power-off protection function.