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Practical Guide: How to Solve Inconsistencies Between Field Differential Pressure Transmitters and DCS Square Root Settings Using TREX

Instrumentation /

Background In chemical plants and other process industries, it is common to encounter discrepancies between the output of field-mounted differential pressure (DP) transmitters and the values displayed or processed in the Distributed Control System (DCS). One of the most frequent causes is the inconsistent application of square root extraction (SQRT)—a method used to linearize flow […]

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Are There Unified Standards for Periodic Inspection of Storage Tanks?

Tank /

Storage tanks play a critical role in industries such as petrochemicals, energy, water treatment, and chemical manufacturing. However, incidents involving tank leakage, corrosion, or structural failure are not uncommon, often due to lapses in safety management or delayed inspections. This raises a fundamental question: Is there a unified standard for the periodic inspection of storage

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Building a Safety Instrumentation Failure Database: From Compliance to Core Safety Asset

Instrumentation /

1. Introduction: A Critical but Elusive Need Everyone agrees: petrochemical enterprises must build a safety instrumentation failure database. But how exactly should it be done? Few have answers. Some industry experts stress the need for such a database during inspections, yet offer no actionable path forward. Meanwhile, frontline workers hold piles of failure records without

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Understanding Conductivity and Its Measurement Principles

Flow meter /

Conductivity is a crucial property that describes a material’s ability to conduct an electric current, particularly in liquid solutions. It is an essential parameter in many scientific and industrial applications, including water quality testing, chemical analysis, and industrial wastewater management. Conductivity is typically measured in Siemens per meter (S/m), but depending on the context, microsiemens

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Understanding Zero Suppression and Elevation in Pressure Transmitters

Pressure Transmitter /

In the field of industrial instrumentation, pressure transmitters often require adjustments to their measurement range, especially when installed in varying physical positions relative to the pressure tapping point. This process is known as zero migration, which includes zero elevation, zero suppression, and no migration. Understanding and properly adjusting for these conditions is essential to ensure

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What is the voltage between the positive terminal of a 24V DC instrument and ground? What about the negative terminal? Why is it like this? What happens if the negative terminal is grounded? What happens if the positive terminal is grounded?

Instrumentation /

In a 24V DC power system, if neither terminal is connected to ground (i.e., the system is floating), the voltage between each terminal and ground is undefined and may fluctuate. However, once the power supply is connected to an instrument, the reference potential stabilizes, and this typically has no negative effect on instrument operation. When

What is the voltage between the positive terminal of a 24V DC instrument and ground? What about the negative terminal? Why is it like this? What happens if the negative terminal is grounded? What happens if the positive terminal is grounded? Read More »

Management System for Instrumentation Control Systems (DCS, SIS, PLC)

PLC /

To strengthen the management of control systems and ensure the safe, stable operation of instrumentation control systems such as DCS (Distributed Control System), SIS (Safety Instrumented System), and PLC (Programmable Logic Controller), this management policy is established. It aims to improve the environment of the control cabinet room, facilitate system maintenance, and prevent accidents effectively.

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Detailed Guidelines for Instrument Calibration and Measurement Procedures

Instrumentation /

Instrument calibration and measurement procedures are essential for ensuring the accuracy and reliability of equipment used in laboratories, calibration facilities, and even within industrial enterprises. Adhering to proper calibration guidelines is crucial for maintaining quality standards and ensuring traceability of measurements. This article provides a detailed overview of the purpose, responsibilities, and processes involved in

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How Often Should a Pressure Gauge Be Calibrated? Why Is Calibration Essential?

Pressure Transmitter /

Pressure gauges are widely used in industrial settings, laboratories, and even daily life. Despite their ubiquity and critical role in safety, their calibration schedules are often overlooked. Some may think, “As long as the needle moves, it’s fine.” However, nothing could be further from the truth. Without regular calibration, a pressure gauge can accumulate measurement

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Application of Magnetic Level Gauges in the Food and Beverage Industry

Level meter /

Magnetic level gauges have become essential equipment in the food and beverage industry due to their hygienic design, intuitive visual indication, and robust corrosion resistance. This article provides a detailed analysis from the perspectives of core application scenarios, technical advantages, representative case studies, and challenges with practical solutions. 1. Core Application Scenarios Liquid Processing and

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