The instrument calibration process must strictly follow the “Metrology Calibration Regulations” (e.g., JJG882-2019) and the technical requirements of the equipment. Based on industrial field operations, the process can be broken down into six key stages. Each stage includes clear operational points and data recording requirements. The detailed process is as follows: 1. Preparation Phase (Pre-calibration […]
Instrument Calibration Process Read More »
In the instrumentation industry, theoretical knowledge is like a wrench in your hand—seemingly simple, but essential when it’s needed. Whether you’re preparing for a certification exam or just looking to build a solid foundation for daily work, understanding circuit diagrams, sensor principles, and troubleshooting logic is crucial. This series will keep updating, providing both theoretical
How to Perform Accurate Voltage Measurement Read More »
In industries dealing with pressure vessels, process pipelines, heat exchangers, valves, and other equipment, pressure testing is an unavoidable part of equipment delivery, system commissioning, and project acceptance. However, behind this highly standardized process, the true engineering purpose, risk boundaries, and the relationship between pressure testing and design assumptions are often reduced to a routine
Pressure Testing of Industrial Equipment: What Does It Really Test? Read More »
Instrumentation cables are specialized cables used for transmitting low-voltage, low-current signals in industrial control systems. These cables are vital for ensuring accurate communication and control between various devices in automation systems. Below is a detailed exploration of the common types of instrumentation cables, their characteristics, and suitable applications. 1. RVVP: Copper Conductor, PVC Insulated and
Detailed Guide to Instrumentation Cable Types and Features Read More »
In the field of instrumentation, theoretical knowledge is like the wrench in your hand—it may seem unimportant, but when it’s needed, it plays a critical role. Whether you’re preparing for an entry-level certification or want to solidify your foundation in practical work, topics like circuit diagrams, sensor principles, and troubleshooting techniques are crucial. This series
How to Perform Accurate Resistance Measurement? Read More »
The Evolution of Open Automation The traditional industrial control sector has long faced several critical challenges: communication ecosystem barriers, tight hardware-software integration, complex industrial network configurations, and inflexible computational capabilities. According to industry statistics, there are over 30 international industrial communication protocol standards in existence today. This diversity, coupled with proprietary ecosystems created by major
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In industries such as petrochemicals, water treatment, energy, pharmaceuticals, and food processing, magnetic float level indicators have become the mainstream equipment for level measurement, owing to their stable performance based on magnetic coupling, convenient visual display, and simple structure with low maintenance costs. However, in practice, many procurement and operations personnel often fall into the
Recently, I came across a fascinating case where AI was applied to closed-loop pH control. This represents a significant step forward, demonstrating the technical feasibility of using AI algorithms in feedback control systems. However, it raises the question: why and how should AI be integrated into feedback control? This question is complex and worth exploring.
Can AI Replace PID in Feedback Control? Read More »
Spherical storage tanks, commonly used for storing pressurized gases or liquids, are equipped with safety valves to ensure safe operation by preventing overpressure scenarios. Configuring and using two safety valves appropriately is critical to maintaining system integrity and avoiding potential hazards. This article provides a detailed explanation of how to configure and use dual safety
Configuration and Usage of Dual Safety Valves in a Spherical Storage Tank Read More »
The functioning of a thermocouple relies on the thermoelectric potential, which depends not only on the temperature of the measurement junction but also on the temperature of the reference junction. In practical applications, the reference junction is commonly referred to as the “cold junction.” For a given thermocouple, when the reference junction temperature remains constant,
Why Do Thermocouples Require Cold-Junction Compensation? Read More »
