FOXBORO RH101AA High Performance Pressure Transmitter

FOXBORO RH101AA High Performance Pressure Transmitter

Product Overview

FOXBORO RH101AA is a high-performance pressure transmitter produced by the Foxboro brand under Schneider Electric. It is mainly used to accurately measure pressure parameters in various industrial processes, such as the pressure of liquids and gases, and convert pressure signals into standard electrical signal outputs for connection and data transmission with other automation equipment. It can be widely used in industrial fields such as petrochemicals, power, metallurgy, etc., providing accurate pressure data support for industrial process control.

Specification parameters

Measurement range: Multiple measurement range options can be provided according to different application requirements, generally covering a wide range from low pressure to high pressure, such as 0-10kPa to 0-100MPa, etc.

Accuracy: It has high measurement accuracy, usually up to ± 0.1% of full scale or higher, and can provide accurate pressure measurement values for industrial processes.

Output signal: The common output signal is a 4-20mA DC analog signal, which can also support the HART communication protocol to achieve digital signal transmission and facilitate connection and communication with intelligent control systems.

Working temperature range: Suitable for a wide working temperature range, generally -40 ℃ -85 ℃, depending on the product model and specifications.

Pressure interface: Provides various forms of pressure interfaces, such as threaded interfaces, flange interfaces, etc., to meet different installation and connection requirements.

Protection level: It usually has a high protection level, such as IP65 or higher, which can effectively prevent dust and water, and adapt to harsh industrial site environments.

Performance characteristics

High precision measurement: Using advanced sensing technology and signal processing circuits, it can accurately measure pressure signals, reduce measurement errors, and provide reliable data support for industrial process control.

Strong stability: It has good temperature stability and long-term stability, can maintain accurate measurement performance at different environmental temperatures, and the measurement accuracy will not show significant drift after long-term operation.

Strong anti-interference ability: With strong resistance to electromagnetic interference and vibration, it can work stably in complex industrial electromagnetic and vibration environments, ensuring the accuracy of measurement results.

Intelligent function: Supports HART communication protocol, enabling remote parameter setting, calibration, and diagnosis, making it convenient for operators to maintain and manage.

Easy installation: Provides multiple installation methods, flexible design of pressure and electrical interfaces, convenient for on-site installation and wiring, and can be quickly put into use.

Working principle

RH101AA pressure transmitters typically use piezoresistive or capacitive sensing principles. Taking the piezoresistive type as an example, when pressure is applied to the sensitive element of the sensor, the resistance value of the sensitive element will change. This resistance change is converted into a voltage signal through a Wheatstone bridge, and then through signal processing circuits such as amplification and filtering, the weak voltage signal is converted into a standard 4-20mA DC output signal or digital signal. At the same time, the microprocessor inside the transmitter will perform linear correction and temperature compensation on the signal to improve measurement accuracy and stability.

Precautions

Installation precautions: The installation location should be far away from strong electromagnetic interference sources, vibration sources, and high-temperature heat sources to avoid affecting measurement accuracy. During installation, ensure that the pressure interface is firmly connected to avoid leakage, and pay attention to the correct installation direction to ensure that the pressure sensor can accurately sense the measured pressure.

Wiring operation: Before wiring, the power must be cut off to ensure safety. Strictly follow the wiring diagram of the transmitter for wiring, correctly distinguish the positive and negative poles of the power supply and the signal output terminal, and avoid reverse connection or short circuit. Use shielded cables that meet specifications and reliably ground the shielding layer to reduce electromagnetic interference.

Calibration and maintenance: Regularly calibrate the transmitter to ensure its measurement accuracy. Calibration should be carried out under the guidance of professionals and using standard calibration equipment. At the same time, it is necessary to regularly inspect the appearance, wiring, and pressure interface of the transmitter. If there is any damage or looseness, it should be dealt with in a timely manner.

Usage environment: Avoid using the transmitter in environments that exceed its specified working temperature and pressure range to avoid damaging the equipment or affecting measurement accuracy. For corrosive media, appropriate materials and protective measures should be selected to prevent the sensor from being corroded.

Application scenarios

Petrochemical industry: used to measure parameters such as pressure inside pipelines, pressure inside reaction vessels, liquid level, etc., to ensure the safety and stability of the production process.

In the power industry, it can be used for measuring boiler drum pressure, turbine lubricating oil pressure, pipeline pressure monitoring, etc., providing reliable pressure data for power production.

Metallurgical industry: Used in equipment such as blast furnaces and converters in steel plants to measure furnace pressure, hydraulic system pressure, etc., which helps optimize production processes and equipment operation.

Other industries: It can also be applied to water treatment, papermaking, food processing and other industries to measure water pressure, liquid pressure, etc., meeting the pressure measurement needs of different industries.