Instrumentation

Instrument calibration refers to using a reference standard to compare and verify the performance of a field instrument.Both devices measure the same process parameter, and the difference between the readings is used to determine whether the instrument falls within the allowable error range. Typical instruments that can be calibrated in the field include:pressure and differential […]

In instrument maintenance work, one of the most frustrating situations is troubleshooting without wiring diagrams.Facing a cabinet full of cables and checking them one by one is slow, error-prone, and often ends in wasted time. This article summarizes two practical methods that allow you to trace and verify instrument wiring even when no drawings exist,

And Why HAZOP Studies Often Fail to Prevent Accidents In many engineering projects, HAZOP has become a standard procedure.The meetings are held, the worksheets are completed, reports are issued, and everything is properly archived. From a compliance perspective, nothing seems wrong. Yet when an abnormal event or even a major accident occurs, one uncomfortable question

A Field Engineer’s Practical Guide to Finding the Real Root Cause For field instrumentation engineers, the most difficult part of troubleshooting is often not repairing the instrument itself, but identifying the real root cause of the failure. Very often, operators simply report: “The instrument is faulty.” However, they cannot clearly explain whether the problem is:

Introduction to Armored Resistance ThermometersArmored resistance thermometers are a combination of a metal protective tube, insulation material, and a resistance element. Typically, the resistance element is made of platinum wire (though nickel wire is also used), and the insulation material is magnesium oxide powder. The protective tube is commonly made of stainless steel. These thermometers

In industrial applications, the accuracy of temperature measurements directly impacts product quality, production safety, and process stability. However, many people have encountered issues such as inaccurate temperature readings despite choosing the right instruments, frequent rework due to improper installation, or even safety risks caused by selecting the wrong components in hazardous environments. In this guide,

In many automation systems, solving multivariable control problems using a single-variable PID controller involves transforming the multivariable problem into multiple single-variable feedback control loops. This approach can be broken down into two steps: 1. Pairing The design of the control system first aims to balance the number of controlled variables with the number of manipulated

At the project initiation stage of many automation systems, the discussions often center around several key issues: Should we use PLC or DCS? Which industrial network should we choose? Should we jump straight into “smart manufacturing”? These questions are undoubtedly important, but they do not determine whether a system will remain useful five or ten

In the field of instrumentation, theoretical knowledge is like the wrench in your hand—often overlooked but essential when it’s needed. Whether you’re preparing for certification exams or looking to strengthen your practical skills, understanding circuit diagrams, sensor principles, and troubleshooting logic is crucial. This series will continue to update, offering both theoretical foundations and practical

In engineering design and material selection, material properties directly affect product safety, lifespan, and cost control. However, in practice, some misunderstandings still persist, such as: “A material with high strength is less likely to deform.” “If a structure is soft, it’s due to insufficient strength.” “A material is too brittle if it fractures.” While these