【2026 Temperature and Pressure Compensation】How to achieve effective temperature and pressure compensation based on the properties of liquids, gases, and vapors
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The attachment is: how to perform effective temperature and pressure compensation based on the properties of liquids, gases, and vapors.
The following response is not part of the text in the attachment and is provided for reference only: Temperature and pressure compensation refers to a technique in which, under standard conditions of 25°C temperature and 1 standard atmosphere of pressure, the measurement data from instruments are automatically adjusted using calculated values based on the actual temperature and pressure at the site of measurement. Its core purpose is to convert measurement results under non-standard operating conditions into corresponding values under standard conditions, ensuring that the results from different measurement points are on the same scale for easier comparison and statistical analysis.
1. Vortex flow meter Application scenarios: Measuring the flow rate of gases, steam (saturated steam, superheated steam), and liquids. Reason for compensation: The density of the fluid changes with temperature and pressure, which affects measurement accuracy. Features: An internal temperature probe and an external pressure transmitter are used to create an integrated system for temperature and pressure compensation. Applicable media: Compressed air, steam, etc
2. Differential pressure flow meters Types: orifice plate flow meters, double D barometers, Annubar meters, etc. Reason for compensation: What is measured is the volumetric flow rate under the current operating conditions, which needs to be converted into a mass flow rate under standard conditions
3. Gas turbine flow meter – Reason for compensation: The density of gas is significantly affected by temperature and pressure; to directly measure volumetric flow rate, it is necessary to convert it to a standard mass flow rate
4. Flow Integrator: Function – A system for flow measurement and accumulation, specifically designed for temperature and pressure compensation. Input signals: temperature, pressure, flow (current, voltage, pulses). Applications: Flow measurement of superheated steam, saturated steam, and general gases
Significance and advantages of temperature and pressure compensation: 1. Improve measurement accuracy by eliminating the impact of density changes caused by temperature and pressure variations on flow measurement
2. Unified comparison benchmark: Convert all measurement results to standard conditions to facilitate systematic comparison and statistics
3. Increased range ratio of the instrument: Intelligent temperature and pressure compensation enables a range ratio of 1:15, which is 3 times higher than that of ordinary instruments
4. Fault diagnosis: It features self-diagnosis for temperature and pressure faults, enhancing system reliability
Precautions 1. Applicable scenarios ----Scenarios with low requirements for temperature and pressure ----Measurement of compressed air ----Internal metering scenarios