Instrumentation

In daily process control operations, periodic oscillations act like an “invisible killer” to equipment health. Even attenuating oscillations subtly accelerate valve wear and other issues. Accurately identifying the type of oscillation, quickly pinpointing its source, and implementing effective solutions are key to improving automation levels and operational stability. This article delves into the identification patterns […]

A Practical Engineering Guide for Process Automation and Instrumentation Systems In industrial automation—especially in plants involving hazardous areas, field instrumentation, and PLC/DCS systems—two devices frequently appear in the same cabinet: intrinsically safe barriers (safety barriers) and signal isolators.Although their appearance and wiring layout may look similar, their engineering purposes, operating principles, and compliance requirements are

Resistance Temperature Detectors (RTDs), such as PT100 sensors, often show differences between the temperature measured at the field and the value displayed in the control room. These deviations are mainly caused by signal transmission losses, wiring conditions, environmental effects, and instrumentation accuracy. The detailed explanation is as follows. 1. Transmission-Related Errors (Primary Cause) RTDs measure

Instrument installation often encounters challenging environments such as flammable or explosive atmospheres, high-dust areas, high-temperature and high-humidity locations, strong electromagnetic fields, or extremely cold regions.In hazardous areas, improper installation may lead to ignition sources, equipment failure, or safety incidents.Therefore, strict compliance with installation requirements is essential. 18 Core Requirements for Instrument Installation in Hazardous Locations

Signal drift is one of the most frustrating issues in industrial automation.It won’t trip the system, won’t raise alarms, and won’t obviously fail — it simply “moves a little” over time. A slow slope appears in the trend, the analog value gradually shifts, and the PID loop starts behaving strangely.Engineers may spend days chasing the

“RS485 can reach up to 1200 meters?” — That’s the textbook answer. But in factory workshops, underground cable ducts, or environments with strong electromagnetic interference, even 200 meters might not work. Why? Because theory is ideal, but real-world environments are complex. This article not only provides a detailed comparison of the technical differences between RS232,

Sealing materials are essential components in industrial applications, primarily used for sealing joints, flanges, and various connection points. The choice of sealing material is crucial to ensure durability, chemical resistance, and overall performance under harsh conditions. Below is an overview of common sealing materials used in instrumentation, including their properties and typical applications. 1. Graphite

Accurate and reliable flow measurement requires periodic calibration. However, calibration intervals vary significantly depending on the instrument type, process medium, operating conditions, and industry compliance requirements.This document provides a comprehensive, instrument-specific overview of recommended calibration periods, key technical checkpoints, calibration methods, and adjustment rules widely adopted in water treatment, chemical, oil & gas, and industrial

In many mission-critical environments—industrial plants, data centers, commercial buildings, control rooms, and other facilities where power loss is unacceptable—a dual power supply system is essential. However, in practical engineering, “dual power” is far more than simply connecting two power sources. It is a complete system involving power sources, switching mechanisms, interlocking protection, load compatibility, and

In real industrial environments, equipment reliability is rarely determined by brand or price alone.The true difference between a stable plant and one that suffers frequent breakdowns lies in one simple question: “Has the equipment been continuously observed, confirmed, and recorded?” Most failures do not happen suddenly.They accumulate quietly—unnoticed, unrecorded, and untreated—until they finally lead to