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How to Visually Inspect a Bimetallic Thermometer: Step-by-Step Guide

Temperature transmitter /

A proper visual inspection of a bimetallic thermometer is a fundamental step to ensure its reliable performance. From the dial to the sensing element, thorough checking of visual features helps detect potential issues before they affect accuracy. This guide outlines key inspection steps, critical points to assess, and common defects to watch for. 1. Dial […]

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Multiphase Flow Measurement Methods: An In-Depth Overview

Flow meter /

Multiphase flow measurement is a critical technology used in industries where fluids consisting of different phases (such as gas, liquid, and solid) are transported together through pipelines. This is particularly important in the oil and gas industry, where water, oil, and gas often co-exist in extraction and production processes. Accurately measuring the flow rates of

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Understanding the HART Protocol: Features and Advantages of HART-enabled Instruments

Hart /

1. Overview HART (Highway Addressable Remote Transducer) is a hybrid analog-digital communication protocol developed by Rosemount in the mid-1980s and released as an open standard in 1986. It is widely used in industrial process automation for enabling smart field devices to communicate over the same 4–20 mA analog signal wiring, combining conventional analog control with

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Key Principles and Standards of Instrument Calibration

Instrumentation /

1. Introduction Instrument calibration is a fundamental process to ensure the accuracy, traceability, and reliability of measurement data. It plays a critical role in quality control, process monitoring, compliance, and research. A scientific and robust calibration program enables measurement results to be legally traceable and technically comparable, aligning with international and industry-specific standards. 2. Four

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Comprehensive Guide to Maintenance and Troubleshooting of Chemical Process Instrumentation

Instrumentation /

1. Routine Inspection and Maintenance 1.1 Daily Instrument Patrol Instrument technicians should follow a pre-defined inspection route twice per shift, based on instrument layout. During inspection, they should communicate with operators to understand operational status and troubleshoot issues proactively. Checklist during patrol: ✅ Check whether local and control room readings are consistent ✅ Verify power

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A Comprehensive Guide to SIL: The Core Defense of Industrial Safety

PLC /

In industrial operations, safety is like a sword of Damocles hanging overhead — any negligence could trigger catastrophic consequences. One key defense mechanism widely adopted across industries is SIL, or Safety Integrity Level. But what exactly is SIL, and why is it so crucial? This article offers a detailed exploration of SIL’s definition, standards, applications,

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Well-known International DCS System Brands: Which Ones Have You Used?

PLC /

DCS, or Distributed Control System, is also referred to as a decentralized control system in China’s automation industry. A DCS is a modern control system based on microprocessors. It distributes control in a decentralized manner, focusing on hazard control while centralizing operations and management. This advanced system integrates computer technology, communication technology, CRT (display) technology,

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Understanding PLC Scan Cycles in Industrial Automation

PLC /

In the world of industrial automation, Programmable Logic Controllers (PLCs) play a vital role in managing real-time operations. One of the most essential yet often overlooked aspects of PLC operation is the scan cycle. Understanding how the PLC scan cycle works can help engineers optimize system performance and ensure reliable, predictable control. 🔄 What Is

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Maintenance Guidelines for Integrated Temperature Transmitters

Temperature transmitter /

1. Safety Measures and Preparations 1.1 Basic Safety Requirements Process Isolation & Power-Off: Disconnect power and signal loop (e.g., DCS) before maintenance. Explosion-Proof Precautions: Use explosion-proof tools in hazardous zones; never open housing when powered. Personal Protective Equipment (PPE): Use insulating gloves, anti-scalding gear, and chemical-resistant suits when needed. 1.2 Tools and Documentation Checklist Item

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Maintenance Guidelines for Electromagnetic Flow Meters

Flow meter /

1. Pre-Maintenance Preparation 1.1 Safety Authorization and Site Control Operational Coordination:Coordinate with the process control department to obtain written work permits and clearly define operational adjustments during maintenance. Ensure that maintenance work does not affect safe system operation. Confined Space Entry (CSE) Preparation:For meters installed underground, open the manhole cover and ventilate the space for

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