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Management System for Instrumentation Control Systems (DCS, SIS, PLC)

PLC /

To strengthen the management of control systems and ensure the safe, stable operation of instrumentation control systems such as DCS (Distributed Control System), SIS (Safety Instrumented System), and PLC (Programmable Logic Controller), this management policy is established. It aims to improve the environment of the control cabinet room, facilitate system maintenance, and prevent accidents effectively. […]

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Detailed Guidelines for Instrument Calibration and Measurement Procedures

Instrumentation /

Instrument calibration and measurement procedures are essential for ensuring the accuracy and reliability of equipment used in laboratories, calibration facilities, and even within industrial enterprises. Adhering to proper calibration guidelines is crucial for maintaining quality standards and ensuring traceability of measurements. This article provides a detailed overview of the purpose, responsibilities, and processes involved in

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How Often Should a Pressure Gauge Be Calibrated? Why Is Calibration Essential?

Pressure Transmitter /

Pressure gauges are widely used in industrial settings, laboratories, and even daily life. Despite their ubiquity and critical role in safety, their calibration schedules are often overlooked. Some may think, “As long as the needle moves, it’s fine.” However, nothing could be further from the truth. Without regular calibration, a pressure gauge can accumulate measurement

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Application of Magnetic Level Gauges in the Food and Beverage Industry

Level meter /

Magnetic level gauges have become essential equipment in the food and beverage industry due to their hygienic design, intuitive visual indication, and robust corrosion resistance. This article provides a detailed analysis from the perspectives of core application scenarios, technical advantages, representative case studies, and challenges with practical solutions. 1. Core Application Scenarios Liquid Processing and

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Understanding the “Dead Zone” in Magnetostrictive Level Transmitters

Level meter /

In industrial liquid level measurement, magnetostrictive level transmitters are widely used due to their high precision, reliability, and ability to measure liquid levels continuously. However, like many other measuring instruments, these devices have a “dead zone” (also called a blind zone)—a small range in which accurate level measurement is not possible. What is the Dead

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Understanding the Relationship Between Nominal Pipe Size (DN), Inner Diameter, and Outer Diameter

Instrumentation /

Introduction In piping systems, selecting the correct pipe size is essential for ensuring compatibility, safety, and optimal performance. However, confusion often arises around the term “Nominal Diameter” (DN) and its relationship with a pipe’s outer diameter (OD) and inner diameter (ID). This article aims to clarify these concepts and provide practical guidance for selecting and

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High-Reliability Level Measurement Solution for Oil Well Christmas Tree Systems

Level meter /

1. Overview The Christmas Tree system is a critical component in oil and gas extraction, responsible for regulating flow and pressure at the wellhead to ensure safe and efficient production. Accurate liquid level measurement within this system plays a vital role in optimizing production efficiency and avoiding equipment damage or safety hazards. To meet these

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Pragmatism in Process Control: Respecting Reality Over Theory

PLC /

IntroductionIn process control design, there are countless “standard solutions” widely accepted in textbooks and control system guidelines. However, real-world applications often present unique constraints, legacy configurations, and operator habits that challenge theoretical ideals. A mature and pragmatic control engineer must learn not to rigidly impose theoretical models but instead respect existing operational knowledge—especially when current

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Understanding SIL, SIS, and SIF: Essential Safety Standards for Automation Engineers

PLC /

In the realm of industrial automation and process control, safety is paramount, especially when dealing with critical systems where human lives and significant assets are at stake. Three key concepts related to functional safety often come up: SIL (Safety Integrity Level), SIS (Safety Instrumented System), and SIF (Safety Instrumented Function). These terms form the backbone

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Feasibility and Standard Requirements for Using Terminal Boxes in SIS System Wiring

PLC /

1. Function of Terminal Boxes in SIS Systems In the wiring process of Safety Instrumented Systems (SIS), terminal boxes are commonly used for connection and signal distribution. They play a crucial role in simplifying wiring structures and enhancing system flexibility, particularly in complex process automation systems. The primary functions of terminal boxes in SIS systems

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