admin_zero, Author at Just Measure it - Page 58 of 359

admin_zero

Can SIS Operator Stations and Engineering Stations Be Shared?

PLC /

1. Introduction In Safety Instrumented Systems (SIS), two critical Human-Machine Interfaces (HMI) are involved: Engineering Station (ES): Used for configuration, programming, diagnostics, and maintenance. Operator Station (OS): Used for monitoring, process operation, and alarm handling. A common industry question is whether these two stations can be shared to reduce cost and simplify system architecture. This […]

Can SIS Operator Stations and Engineering Stations Be Shared? Read More »

Advanced Regulatory Control (ARC) vs. Advanced Process Control (APC)

PLC /

Introduction Proportional–Integral–Derivative (PID) control has been the cornerstone of industrial automation for decades. While PID works reliably in single-variable systems with strong causal relationships, it faces significant limitations in multivariable and constrained processes. To address these challenges, two approaches have emerged: Advanced Regulatory Control (ARC) and Advanced Process Control (APC). This article compares ARC and

Advanced Regulatory Control (ARC) vs. Advanced Process Control (APC) Read More »

When Do We Need Advanced Process Control (APC)?

Instrumentation /

In industrial process automation, not every plant requires advanced control strategies. In many cases, well-tuned PID loops and simple control logic implemented in the DCS are sufficient to achieve stable and efficient operation. However, for more complex processes, relying only on PID optimization can be inadequate, and advanced process control (APC) becomes necessary. 1. Cases

When Do We Need Advanced Process Control (APC)? Read More »

Mastering Instrumentation Theory: Doubling Efficiency in Fault Diagnosis

Instrumentation /

In industrial instrumentation, theoretical knowledge is just like a wrench in your toolbox — it may not seem important at first glance, but when troubleshooting, it becomes indispensable. Whether preparing for certification exams or improving practical fieldwork, mastering instrumentation theory helps build a solid foundation. This document highlights several core concepts that often cause confusion

Mastering Instrumentation Theory: Doubling Efficiency in Fault Diagnosis Read More »

RS-485 Communication in Industrial Automation: Two-Wire vs. Four-Wire Systems

Instrumentation /

Introduction In industrial automation, RS-485 communication has become one of the most widely used methods for data exchange between devices. Thanks to its reliability, strong noise immunity, and long-distance capability, it is commonly found in factory automation, building control, and energy monitoring systems. However, RS-485 is not a single wiring method. It can be implemented

RS-485 Communication in Industrial Automation: Two-Wire vs. Four-Wire Systems Read More »

The Essential Role of Radar Level Meters in Accurate Discharge Tank Measurements

Level meter /

Radar level meters, which operate on the principle of electromagnetic wave reflection, are non-contact instruments designed to measure liquid levels by emitting microwave pulses and receiving their reflected signals. The process involves transmitting high-frequency pulses from the radar probe towards the surface of the liquid being measured. When these pulses encounter the liquid’s surface, they

The Essential Role of Radar Level Meters in Accurate Discharge Tank Measurements Read More »

Magnetostrictive Level Gauge: Working Principle, Applications, Maintenance, and Selection Guide

Level meter /

1. Working Principle (Core Logic: Magnetic Field Interaction + Time Difference Calculation) A magnetostrictive level gauge measures liquid level based on the magnetostrictive effect. The measurement process can be summarized as follows: The electronic unit sends a current pulse into the magnetostrictive wire located inside the probe. This pulse generates a circular magnetic field along

Magnetostrictive Level Gauge: Working Principle, Applications, Maintenance, and Selection Guide Read More »

Comprehensive Guide to the Five Most Common Flange Facing Types (FF, RF, TG, RJ, MFM)

Flange /

1. Introduction In industrial piping systems, flange connections play a vital role in ensuring mechanical strength and sealing integrity. The core element of a flange connection lies in its facing type (also referred to as the sealing face).Different flange facings are designed to withstand varying pressure ratings, temperature ranges, and process media characteristics. Selecting the

Comprehensive Guide to the Five Most Common Flange Facing Types (FF, RF, TG, RJ, MFM) Read More »

Differences Between Pressure Sensors, Pressure Relays, and Pressure Switches

Pressure /

1. Pressure Sensor (Transducer) Working Principle: Detects a pressure signal and converts it into a usable electrical signal (analog or digital). Applications: Widely used in industrial automation systems such as water resources, electric power, petrochemicals, aerospace, railways, and smart buildings. Features: Provides continuous output (e.g., 4–20 mA, 0–10 V, RS485). Interfaces with PLC, DCS, or

Differences Between Pressure Sensors, Pressure Relays, and Pressure Switches Read More »

Level Measurement Principle and Troubleshooting of Water Seal Tank

Level meter /

1. Operating Conditions The water seal tank level gauge is installed in the flare system (Unit 80). It is a critical instrument for monitoring the liquid level in the water seal tank, ensuring safe operation of the flare tail gas treatment system. High level condition: When the level exceeds the setpoint, the gauge generates an

Level Measurement Principle and Troubleshooting of Water Seal Tank Read More »

Translate »