Regarding the instruments, translation of the shutoff element Square Root Extraction
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This post was last edited by leteblink on 2010-7-23 18:10. AnalogInputSignal ............................................... 4-20 mA Square Root Extraction .................... Yes. What does Square Root Extraction mean? Thank you!
This post was last edited by wingman1985 on 2010-7-24 at 14:46. Literal translation: Extracting the square root --------------------------- The above is a typical example of someone who doesn’t understand the subject matter and is talking nonsense; it should be translated as “taking the square root”. As echo said.
It’s not a flow-blocking element, right? It’s just a square root calculator—a type of arithmetic element. I’m not an expert in control systems; this is just for reference
To wingman1985: I saw this post yesterday; I took a quick glance at it but it didn’t give me any direction. Looking at it today, the literal translation of the original term is “square root extractor”; I had heard someone from the control group refer to it as a “square root finder”, and that’s when I realized it must be the same thing!
Reply to 4# DXJ122: A recommended book is “Process Control Instruments”. Of course, there is no download on this site. I am providing only a book catalog here; the original link is: http://www.tushucheng.com/book/1941980.html
Chapter 1 Introduction
Section 1 Development and Classification of Process Control Instruments
1. Development of Process Control Instruments
2. Classification of Process Control Instruments
Section 2 Signal Systems and Power Supply Methods
1. Signal Systems
2. Power Supply Methods
Section 3 Basic Knowledge of Safety and Explosion Protection as well as Engineering Measures for Explosion Prevention
1. Basic Knowledge of Safety and Explosion Protection
2. Key Design Principles for Spark-Safe Instruments
3. Explosion Prevention Measures for Control Systems
Part I Analog Control Instruments
1. Overview of DDZ-II Electric Unit Combination Instruments
2. Classification of DDZ-II Electric Unit Combination Instruments
Chapter 2 Analog Regulators
Section 1 Regulation Laws and Their Expressions
1. Regulation Laws of Regulators
2. Expressions of Regulation Laws
Section 2 Basic Regulators
1. Working Principle and Circuit Analysis of Basic Regulators
2. Parameter Calculation for Basic Regulators
Section 3 Special Regulators
1. Anti-Integral Saturation Regulators
2. Feedforward Regulators
3. Differential-Predominant PID Regulators
4. DDC Standby Regulators
Chapter 3 Transmitters, Converters, and Operators
Section 1 DDZ-III Electro-Mechanical Differential Pressure Transmitters
1. Working Principle
2. Functions of Major Components
Section 2 Capacitive Differential Pressure Transmitters
1. Composition of Capacitive Differential Pressure Transmitters
2. Input Conversion Section
3. Amplifier and Feedback Section
4. Corrosion and Clogging Prevention in the Use of Differential Pressure Transmitters
Section 3 Temperature Transmitters
1. Overview
2. Four-Wire Temperature Transmitters
3. Two-Wire Temperature Transmitters
Section 4 Signal Converters
1. Electrical/Pneumatic Converters
2. Opto-Isolectors
Section 5 Adders and Subtractors
1. Working Principle
2. Circuit Analysis
Section 6 Multipliers and Dividers
1. Working Principle
2. Principle Block Diagram Analysis
3. Circuit Analysis
4. Use of Multipliers and Dividers
Section 7 Square Root Calculators
1. Role of Square Root Calculators in Automatic Control Systems
2. Working Principle
3. Circuit Analysis
Chapter 4 Actuators
Section 1 Actuating Mechanisms
1. Electric Actuators
2. Pneumatic Actuators
3. Output Force (Torque) of Actuators
4. Valve Positioners
Section 2 Regulation Mechanisms
1. Types of Regulation Mechanisms
2. Characteristic Analysis of Control Valves
Section 3 Selection and Calculation of Actuators
1. Selection of Actuator Structure Types
2. Selection of Flow Characteristics for Control Valves
3. Selection of Control Valve Diameter
Part II Digital Control Instruments
Chapter 5 Programmable Regulators
Section 1 Structural Principles, Functionality, and Operations of Programmable Regulators
1. Overview
2. Basic Structure and Working Principle
3. Digital Filtering
4. Functions of Programmable Regulators
5. Programming Language for Programmable Regulators
6. Control Formulas for Programmable Regulators
Section 2 KMM Programmable Regulator
1. Overview
2. Structure and Working Principle of KMM
3. Panel and Data Types of KMM
4. Functions of KMM Programmable Regulator
5. Control Types of KMM Programmable Regulator
6. Auxiliary Switches of KMM Programmable Regulator
7. Software Design for KMM Programmable Regulator
8. Analysis of Operation Formulas for KMM Programmable Regulator
Section 3 Operating Modes of KMM
1. Operating Modes on the Front Panel of KMM
2. Data Setter and Its Operating Modes
3. Operating States of KMM
4. Switching Between “M”“A”“C” States and COMP State
Section 4 Applications of KMM Programmable Regulators
1. Feedforward-Feedback Control Systems
2. Feedforward Cascade Control Systems
3. Variable-Parameter Control Systems
4. Programmed Control Systems
5. Time-Proportional Control Systems
6. External Setting Control Systems
7. Automatic Bias PID Control Systems
8. Selective Control Systems
9. Smith Predictive Compensation Control Systems
Chapter 6 DDZ-S Series Instruments and YS-80 Series Instruments
Section 1 Overview of DDZ-S Series Instruments
1. Basic Characteristics of S Series Instruments
2. Main Technical Specifications of S Series Instruments
3. Naming Convention for S Series Instruments
Section 2 Intelligent Transmitter ST3000
1. Measurement Principle
2. Structure of ST3000 Transmitter
Section 3 SRHD Intelligent Recorder
1. Input and Output Signal Circuits
2. Software Functions
Section 4 STED Temperature Transmitters
1. DC Millivolt Input Type Transmitters
2. Thermocouple Temperature Transmitters
3. Thermal Resistance Temperature Transmitters
Chapter 7 Distributed Integrated Control Systems
Section 1 Development Overview and Basic Composition
1. Development Overview
2. Basic Structure of Distributed Control Systems
Section 2 TDC-3000 Distributed Control System
1. Composition of TDC-3000 System
2. Distributed Process Control Devices
3. Basic Controller BC
4. Multifunctional Controller MC
5. Data Acquisition Devices
6. Enhanced Operation Station (EOS)
7. TDC-3000 LCN
8. Reliability Analysis of TDC-3000
Chapter 8 Role of Process Control Computers in Technical Transformation of Metallurgical Enterprises
Section 1 Applications of Process Control Computers
1. Classification of Process Control Computers
2. Process Input Channels
3. Process Output Channels
Section 2 Software for Microcomputer Regulators
1. Input Methods for Analog Input Channels
2. Scale Converters in Output Channels
Main References
Chapter 1 Introduction
Section 1 Development and Classification of Process Control Instruments
1. Development of Process Control Instruments
2. Classification of Process Control Instruments
Section 2 Signal Systems and Power Supply Methods
1. Signal Systems
2. Power Supply Methods
Section 3 Basic Knowledge of Safety and Explosion Protection as well as Engineering Measures for Explosion Prevention
1. Basic Knowledge of Safety and Explosion Protection
2. Key Design Principles for Spark-Safe Instruments
3. Explosion Prevention Measures for Control Systems
Part I Analog Control Instruments
1. Overview of DDZ-II Electric Unit Combination Instruments
2. Classification of DDZ-II Electric Unit Combination Instruments
Chapter 2 Analog Regulators
Section 1 Regulation Laws and Their Expressions
1. Regulation Laws of Regulators
2. Expressions of Regulation Laws
Section 2 Basic Regulators
1. Working Principle and Circuit Analysis of Basic Regulators
2. Parameter Calculation for Basic Regulators
Section 3 Special Regulators
1. Anti-Integral Saturation Regulators
2. Feedforward Regulators
3. Differential-Predominant PID Regulators
4. DDC Standby Regulators
Chapter 3 Transmitters, Converters, and Operators
Section 1 DDZ-III Electro-Mechanical Differential Pressure Transmitters
1. Working Principle
2. Functions of Major Components
Section 2 Capacitive Differential Pressure Transmitters
1. Composition of Capacitive Differential Pressure Transmitters
2. Input Conversion Section
3. Amplifier and Feedback Section
4. Corrosion and Clogging Prevention in the Use of Differential Pressure Transmitters
Section 3 Temperature Transmitters
1. Overview
2. Four-Wire Temperature Transmitters
3. Two-Wire Temperature Transmitters
Section 4 Signal Converters
1. Electrical/Pneumatic Converters
2. Opto-Isolectors
Section 5 Adders and Subtractors
1. Working Principle
2. Circuit Analysis
Section 6 Multipliers and Dividers
1. Working Principle
2. Principle Block Diagram Analysis
3. Circuit Analysis
4. Use of Multipliers and Dividers
Section 7 Square Root Calculators
1. Role of Square Root Calculators in Automatic Control Systems
2. Working Principle
3. Circuit Analysis
Chapter 4 Actuators
Section 1 Actuating Mechanisms
1. Electric Actuators
2. Pneumatic Actuators
3. Output Force (Torque) of Actuators
4. Valve Positioners
Section 2 Regulation Mechanisms
1. Types of Regulation Mechanisms
2. Characteristic Analysis of Control Valves
Section 3 Selection and Calculation of Actuators
1. Selection of Actuator Structure Types
2. Selection of Flow Characteristics for Control Valves
3. Selection of Control Valve Diameter
Part II Digital Control Instruments
Chapter 5 Programmable Regulators
Section 1 Structural Principles, Functionality, and Operations of Programmable Regulators
1. Overview
2. Basic Structure and Working Principle
3. Digital Filtering
4. Functions of Programmable Regulators
5. Programming Language for Programmable Regulators
6. Control Formulas for Programmable Regulators
Section 2 KMM Programmable Regulator
1. Overview
2. Structure and Working Principle of KMM
3. Panel and Data Types of KMM
4. Functions of KMM Programmable Regulator
5. Control Types of KMM Programmable Regulator
6. Auxiliary Switches of KMM Programmable Regulator
7. Software Design for KMM Programmable Regulator
8. Analysis of Operation Formulas for KMM Programmable Regulator
Section 3 Operating Modes of KMM
1. Operating Modes on the Front Panel of KMM
2. Data Setter and Its Operating Modes
3. Operating States of KMM
4. Switching Between “M”“A”“C” States and COMP State
Section 4 Applications of KMM Programmable Regulators
1. Feedforward-Feedback Control Systems
2. Feedforward Cascade Control Systems
3. Variable-Parameter Control Systems
4. Programmed Control Systems
5. Time-Proportional Control Systems
6. External Setting Control Systems
7. Automatic Bias PID Control Systems
8. Selective Control Systems
9. Smith Predictive Compensation Control Systems
Chapter 6 DDZ-S Series Instruments and YS-80 Series Instruments
Section 1 Overview of DDZ-S Series Instruments
1. Basic Characteristics of S Series Instruments
2. Main Technical Specifications of S Series Instruments
3. Naming Convention for S Series Instruments
Section 2 Intelligent Transmitter ST3000
1. Measurement Principle
2. Structure of ST3000 Transmitter
Section 3 SRHD Intelligent Recorder
1. Input and Output Signal Circuits
2. Software Functions
Section 4 STED Temperature Transmitters
1. DC Millivolt Input Type Transmitters
2. Thermocouple Temperature Transmitters
3. Thermal Resistance Temperature Transmitters
Chapter 7 Distributed Integrated Control Systems
Section 1 Development Overview and Basic Composition
1. Development Overview
2. Basic Structure of Distributed Control Systems
Section 2 TDC-3000 Distributed Control System
1. Composition of TDC-3000 System
2. Distributed Process Control Devices
3. Basic Controller BC
4. Multifunctional Controller MC
5. Data Acquisition Devices
6. Enhanced Operation Station (EOS)
7. TDC-3000 LCN
8. Reliability Analysis of TDC-3000
Chapter 8 Role of Process Control Computers in Technical Transformation of Metallurgical Enterprises
Section 1 Applications of Process Control Computers
1. Classification of Process Control Computers
2. Process Input Channels
3. Process Output Channels
Section 2 Software for Microcomputer Regulators
1. Input Methods for Analog Input Channels
2. Scale Converters in Output Channels
Main References
Reply to 5# wingman1985, thank you