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Calibration and Verification of Toxic and Combustible Gas Detectors

In high-risk environments such as petrochemical plants, gas stations, tunnels, and laboratories, toxic and combustible gas detectors serve as the first line of defense for both personnel safety and the stable operation of equipment. So, do these detectors require verification or calibration? What is the difference between these two processes? Who is responsible for them, […]

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Establishing Order in Multi-Loop Tuning Through Sequencing

In the practice of multi-loop control system tuning, it is essential to maintain a global perspective and a systemic view. Focusing solely on the disturbance rejection of individual control loops, without considering their interactions with other loops, often leads to suboptimal performance. Missteps in cascade control tuning, for instance, often stem from a lack of

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Common Faults and Troubleshooting of On-Site Instruments

Instrument failures can be complex and difficult to diagnose immediately. It’s important to stay calm and analyze the situation step by step. The faults can generally be divided into three sections: on-site detection, intermediate transmission, and terminal display. Seasonal factors, such as preventing high temperatures in summer and freezing in winter, should also be considered.

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How Can Instrument Technicians Summarize Their Work Experience and Improve Their Skills?

As an instrument technician, it’s essential to learn how to proactively reflect on your work, summarize your experiences, and improve your maintenance skills. This process is key to transforming repetitive tasks into expert-level capabilities. Below is a comprehensive framework that moves from “reflection” to “improvement,” which you can apply based on your own experiences. Part

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What Does the “T” on Explosion-Proof Nameplates Really Mean?

1. Do You Really Understand Explosion-Proof Nameplates? In chemical plants, it is common to see explosion-proof motors or vibrating level switches with nameplates marked with: Ex ia IIC T4 ~ T6 Ga While many engineers recognize this as the explosion-proof classification, the meaning of “T4 ~ T6” is often misunderstood. This marking refers to the

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How to Correctly Select Temperature Transmitters? Master These 7 Key Factors to Avoid 90% of Mistakes

In industrial production, temperature transmitters act as the “eyes” that monitor temperature. Whether it’s measuring temperatures in food cold chains, high-temperature monitoring in chemical reactors, or precise temperature control in electronics workshops, they are indispensable. However, many engineers make mistakes when selecting these devices: either choosing a transmitter with too small a range, causing it

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Why Digital Instruments Perform More Stably and Are Less Affected by Environmental Interference Compared to Analog Instruments

In the field of instrumentation, understanding the differences between analog and digital instruments is crucial for making informed decisions. This article explains why digital instruments are more stable and less susceptible to environmental interference compared to their analog counterparts. Analog vs. Digital Signals In analog instruments, signals are continuous, meaning they can fluctuate infinitely within

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Total Deviation in Orifice Flowmeters: Your Pressure Tapping Might Have Been Installed Wrong From the Start!

The installation of the pressure tapping for throttling devices may seem simple, but it directly affects the accuracy of the measurement. This is especially critical when measuring steam flow on vertical pipelines, where the correct positioning of the tapping is key. However, in many cases, pressure tapping systems designed for aesthetics sacrifice signal transmission accuracy,

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What is a Safety Barrier, and How is it Related to NAMUR?

In modern industrial automation, explosion protection is one of the most critical design requirements. Whether it’s in chemical plants, oil and gas platforms, pharmaceutical factories, or coal mining systems, any area with flammable gases or dust requires strict control over the propagation of electrical energy. Among many explosion protection measures, one small device is often

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Job Responsibilities of a Fine Chemical Instrumentation Engineer

The responsibilities of a Fine Chemical Instrumentation Engineer encompass the design, installation, maintenance, management, and collaboration of instrumentation systems in chemical processes. The key duties are as follows: Instrumentation and Automation System Design and Selection Participate in the design of instrumentation and automation control systems, such as PLC, DCS, and SCADA, based on production process

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