1. Basic knowledge of instruments Instruments are key components in industrial automation systems, and are mainly used to measure, record, control and adjust various physical quantities, such as temperature, pressure, flow, liquid level, etc. The basic function of instruments is to achieve signal conversion, that is, to convert the measured physical quantity into a standard […]
Automation knowledge for instrument engineers Read More »
After being in use for a period of time, electromagnetic flowmeters may suddenly become inaccurate, which undoubtedly causes significant inconvenience to industrial production. This article will explore the reasons why electromagnetic flowmeters become inaccurate after some time and offer solutions to these problems. First, let’s analyze the possible causes: Sensor Contamination: During operation, the sensor
What Causes Electromagnetic Flowmeters to Become Inaccurate After a Period of Use Read More »
Flammable gases can be classified as either single flammable gases or mixed flammable gases, both of which have flammable and explosive properties. The explosion limit refers to the concentration range within which a flammable gas, when mixed with an oxidizing gas, will explode under standard testing conditions. Oxidizing gases can include air, oxygen, or other
Common Flammable and Explosive Gases and Their Explosion Limits Read More »
Automation instruments can be categorized into six major types: field measurement instruments, field control instruments, field instrument actuators, display and recording instruments, regulation control instruments, and special measurement instruments. Each major type can be further subdivided into several categories. This article provides a detailed discussion of these types. Definition of Automation Instruments Automation instruments are
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Volumetric flow meters play a vital role in the chemical industry, where accurate measurement and control of fluid flow are essential for maintaining product quality, optimizing production processes, managing energy consumption, and ensuring safety and environmental compliance. The primary applications include: 1. Accurate Measurement of Fluid Flow 1.1 Measurement of Raw Materials: In chemical production,
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High temperature conditions are a common and challenging environment in industrial production. Under such conditions, the accuracy of liquid level monitoring is directly related to production safety and efficiency. Radar level meters have shown their irreplaceable importance in high temperature application environments due to their unique advantages. This article aims to explore the impact of
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Measuring liquid flow in large-diameter pipelines is critical for applications such as municipal water supply, industrial cooling water systems, and wastewater treatment plants. The challenge in these systems is ensuring accurate, stable, and reliable measurement while also maintaining ease of installation and maintenance. Several flow measurement techniques are commonly employed for large-diameter pipelines, each with
Liquid Flow Measurement in Large-Diameter Pipelines Read More »
Instrument numbering holds significant value in industrial production, primarily reflected in the following aspects: 1. Identification and Localization Unique Identification: Every instrument has a specific instrument number, similar to an identification card, enabling precise recognition and distinction of different instruments. This allows operators and maintenance personnel to quickly and accurately locate specific instruments, improving work
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1. Poor contact The metal conductor inside the terminal is the core part of the terminal. It transmits the voltage, current or signal from the external wire or cable to the contact corresponding to the connector. Therefore, the contact must have excellent structure, stable and reliable contact retention and good conductivity. Due to unreasonable contact
Common faults of terminal blocks, reasons for choosing standard signal 4-20mA Read More »
In a piping system, it is common practice to install a flow meter upstream of a control valve. This arrangement is generally preferred due to several key reasons: 1. Ensuring Measurement Accuracy The primary reason for placing the flow meter before the control valve is to ensure accurate flow measurements. Control valves, when adjusted, create
Why Flow Meters Are Installed Upstream of Control Valves: Key Reasons and Benefits Read More »
