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Why Do Pressure Transmitters Exhibit Zero Drift More Frequently Than Temperature Transmitters?

Pressure Transmitter /

1. Differences in Application Requirements Pressure transmitters—especially differential pressure transmitters—often require range adjustments based on specific field conditions. For example, when used for level measurement in sealed tanks, condensation of the gas-phase medium can cause condensate to accumulate in the impulse lines or low-pressure chambers. This creates an unintended static pressure, resulting in output deviation. […]

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Flow Instrumentation Installation Inspection Guidelines

Flow meter /

Three-Checks & Four-Fixes for Flow Meters This document outlines key inspection points during flow meter installation. Adhering to these guidelines ensures long-term reliability, accuracy, and safety of the instrumentation in industrial environments. I. Mechanical Installation Checks Temporary Gasket Installation Temporary gaskets must be used during initial installation to prevent damage to flange sealing surfaces. Flow

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The Impact of Instrumentation and Control (I&C) Condition Monitoring Platforms on the Long-Term Development of Petrochemical Enterprises

Instrumentation /

1. Introduction With the rapid advancement of emerging technologies such as the Internet of Things (IoT), cloud computing, edge computing, digital twins, and artificial intelligence (AI), the petrochemical industry is undergoing a transformation from traditional automation to intelligent information systems. In response, China’s Ministry of Emergency Management issued the “Industrial Internet + Hazardous Chemical Safety

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Common Causes for Discrepancies Between DCS and Field Instrument Readings

Flow meter /

When the values displayed by the DCS (Distributed Control System) differ from those shown on the field instruments, it raises concerns about the accuracy of system performance, affecting both safety and operational stability. Here’s a detailed analysis of potential causes and corresponding solutions for this issue: 1. Sensor Malfunction or Failure Field sensors might experience

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Is Higher Accuracy Always Better for Pressure Transmitters?

Pressure Transmitter /

Pressure transmitter accuracy is a key indicator of measurement reliability. However, the belief that “higher accuracy is always better” is not universally applicable. In industrial practice, the selection of a pressure transmitter should be based on actual application requirements, rather than pursuing the highest specification available. 1. Understanding Accuracy in Pressure Transmitters Accuracy defines how

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Comprehensive Safety Measures for Pressure Gauge Operation

Pressure Transmitter /

1. Introduction Pressure gauges play a critical role in monitoring process pressure across industrial systems. Ensuring their safe and accurate performance is vital for operator safety, equipment protection, and process stability. This document outlines key safety measures including overpressure protection, environmental considerations, and vibration resistance for pressure gauges. 2. Overpressure and Pressure Relief Protection 2.1

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Application of Gas Turbine Flow Meters in LNG Gasification and Pressure Regulation Process

Flow meter /

The LNG gasification and pressure regulation skid is a natural gas supply system designed for medium and small-sized enterprises and large public buildings. It is widely used for emergency gas supply, residential community gas supply, and industrial production gas supply. The gasification and pressure regulation process consists of two main parts: the gasification of LNG

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PID – The Timeless Legend of Feedback Control in Industrial Applications

PLC /

1. Introduction: Simple Yet Powerful Proportional–Integral–Derivative (PID) control is a linear feedback control algorithm that calculates control output based on three terms: present error, accumulated error (integral), and rate of change of error (derivative). Its simple mathematical form has led to widespread adoption across industrial sectors and made it a classic subject for research, comparison,

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Common Chemical Media Characteristics in Industrial Applications

Instrumentation /

1. Classification and Properties of Common Chemical Media A. Acids Media Chemical Formula Characteristics Safety Precautions Sulfuric Acid H₂SO₄ Strongly corrosive, high density (1.84 g/cm³), highly exothermic when diluted Use acid-resistant materials (e.g., PP, PTFE, lead); always add acid to water Hydrochloric Acid HCl Strong volatility, pungent smell, reacts with metals to release hydrogen gas

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Maintenance Guidelines for Orifice Flowmeters

Flow meter /

1. Overview of Orifice Flowmeters Orifice flowmeters, also known as differential pressure flowmeters, consist of a primary element (such as an orifice plate, nozzle, or Venturi tube) and a transmitter. Special types like quarter-circle orifice plates, segmental orifice plates, and double orifice plates are used for specific applications. Depending on the fluid characteristics (e.g., corrosive,

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