FOXBORO P0973LN differential pressure transmitter

FOXBORO P0973LN differential pressure transmitter

Product Overview

FOXBORO P0973LN is a high-precision intelligent differential pressure transmitter launched by Foxboro brand under Schneider Electric. Its core function is to measure differential pressure signals in industrial processes in real time (such as fluid differential pressure, liquid level difference, pressure difference, etc.), and convert them into standard electrical signals (4-20mA/0-10V, etc.) or digital signals, achieving efficient data exchange with distributed control systems (DCS) and programmable logic controllers (PLC). The transmitter adopts advanced capacitive sensing technology and digital signal processing scheme, with excellent measurement accuracy and long-term stability. The housing is made of aluminum alloy material, with a protection level of IP65, and can be directly deployed in harsh environments on site. It supports multiple process connection methods and signal output types, adapts to the measurement needs of multiple scenarios such as liquid level, flow rate, and pressure, and is widely used in the field of industrial process control. It is a key detection equipment to ensure precise control of production processes.

Specification parameters

-Core parameters: Model P0973LN, equipment type is intelligent differential pressure transmitter, measurement principle is capacitive sensing; The measurement range can be configured, with a typical differential pressure range of 0-1kPa to 0-10MPa (subject to actual configuration);

-Accuracy performance: Measurement accuracy reaches ± 0.075% of full scale, repeatability error is ≤± 0.01% of full scale, response time is ≤ 100ms, ensuring rapid capture of process parameter changes;

-Environmental and medium parameters: Environmental temperature range -20 ℃ -70 ℃, medium temperature range -25 ℃ -80 ℃, relative humidity 0-85% RH (non condensing); Suitable for various industrial media, with strong corrosion resistance;

-Signal and Power Supply: Supports multiple output signal types, can select 4-20mA/± 10V/0-10V analog signals through internal instrument parameters, and some specifications support RS485/RS232 digital communication; The power supply mode is optional for two-wire/three wire system, suitable for 24V DC industrial standard power supply;

-Physical and protection specifications: The shell material is aluminum alloy, with a protection level of IP65; The process connection method supports multiple types such as flanges and threads (configured as needed); Equipped with LCD digital display panel, supporting on-site parameter viewing and operation;

-Compliance standards: Complies with IEC related industrial measurement equipment standards, has anti electromagnetic interference capabilities, and is suitable for complex electromagnetic environments in industrial sites.

Performance characteristics

-High precision and stable measurement: using capacitive sensing core and digital signal processing technology, effectively reducing the impact of temperature drift and pressure fluctuations on measurement results, ensuring long-term stable operation accuracy;

-Flexible output and communication: supports multiple types of analog signal output, can be matched with different control systems as needed; Partial specifications integrate RS485/RS232 digital interfaces for remote parameter configuration and data acquisition;

-Convenient on-site operation: equipped with LCD digital display panel and "M", "S", "Z" three color function keys, supporting measurement mode switching, main variable reset, zero/full range calibration and other operations, no additional tools are needed to complete on-site debugging;

-Strong environmental adaptability: The aluminum alloy shell with IP65 protection level has excellent dustproof, waterproof, and corrosion-resistant performance; Wide temperature working range suitable for high and low temperature industrial scenarios, can be directly installed and used on site;

-Safe and reliable design: Built in overvoltage protection, short circuit protection and other functions to avoid equipment damage caused by abnormal process pressure or wiring errors; Compliant with electrostatic discharge (ESD) standards to ensure safe wiring and maintenance processes;

-Wide installation adaptability: supports multiple process connection methods and installation postures, can be flexibly deployed according to on-site process requirements, and adapts to different measurement scenarios such as liquid level tanks, pipelines, reaction vessels, etc.

Working principle

The core working logic of FOXBORO P0973LN differential pressure transmitter is to convert differential pressure signals into electrical signals through capacitive sensors, and output standard signals after digital processing. When a differential pressure is generated in the process medium, the pressure acts on the sensing diaphragm of the transmitter, causing slight deformation of the diaphragm and changing the capacitance value inside the sensor; The change in capacitance value is converted into a weak voltage signal through a built-in signal conditioning circuit, and then converted into a digital signal through an A/D converter; The digital signal processor (DSP) performs temperature compensation, linear correction, and other optimization processing on the data to eliminate the influence of environmental temperature and medium characteristics on measurement accuracy; Finally, the processor converts the processed signal into a preset standard analog signal (4-20mA/0-10V, etc.) or digital signal, which is transmitted to control systems such as DCS and PLC through wiring terminals. At the same time, the transmitter displays the measured values in real time through the LCD panel, and the operator can configure and calibrate the parameters through the function keys. The calibration data is stored in real-time in the built-in memory to ensure that the parameters are not lost after the device is restarted.

Precautions

-Installation specifications: Installation personnel must have the qualification to operate electrical equipment, and non professionals are strictly prohibited from operating; The installation location should be far away from strong electric fields, strong magnetic fields, severe vibration sources, and high-temperature heat sources to ensure that the mechanical strength is sufficient to support the weight of the equipment; During installation, it is necessary to cover the top of the product with cloth or paper to prevent foreign objects such as drilling metal shavings and oil stains from entering the interior of the equipment; After installation, remove any obstructions to avoid blocking ventilation holes and affecting heat dissipation;

-Wiring operation: Before wiring, all relevant equipment power must be cut off, and the operation can only be carried out after the residual voltage of the internal capacitor of the equipment is released (following the time specified on the product warning label); After measuring the DC voltage of the main circuit to confirm safety, use cables that meet the requirements for wire diameter and shielding for wiring. Shielded cables must be reliably grounded at one end; Strictly distinguish between the power supply end, signal input end, and output end, and strictly prohibit connecting the input power supply to the output end to avoid equipment damage; After the wiring is completed, ensure that the terminal screws are securely fastened and there are no foreign objects left inside;

-Calibration and maintenance: On site calibration should be carried out in an environment without pressure (zero calibration) or standard pressure (full-scale calibration), and it is not recommended to perform full-scale pressurization and calibration operations at will on site; Regularly inspect the connection parts for leaks, loose or oxidized wiring terminals, and it is recommended to perform accuracy verification every 6 months;

-Power on and operation: Before powering on, confirm that the power supply voltage is consistent with the rated voltage of the product, the installation and wiring are intact, and there are no unrelated personnel around; After power on, conduct a trial run to confirm stable measurement values, normal output signals, and no abnormal alarms before putting it into formal operation; It is strictly prohibited to touch the wiring terminals or disassemble equipment components during operation to avoid the risk of electric shock;

-Storage and transportation: Professional packaging should be used during storage and transportation to avoid water splashing, rain, direct sunlight, strong vibration, and impact; The storage environment should be dry and ventilated, away from corrosive gases, and the storage time is not recommended to exceed 3 months. After long-term storage, precision testing is required; Lift and place gently during transportation, grip the equipment casing firmly to prevent parts from falling off;

-Fault handling: If there is an abnormal measurement value or no output, first check whether the process connection is leaking and whether the wiring is loose; View the alarm information through the LCD panel. If it cannot be resolved, try resetting the main variable to zero or restoring the factory settings; When replacing equipment, ensure that the model is consistent and recalibrate before putting it into use.