Overview
IEC TS 62098:2000 specifies the foundational methods for evaluating microprocessor-based instruments in industrial process measurement and control systems. Developed by the International Electrotechnical Commission (IEC), this technical specification guides the structured analysis and assessment of instruments using microprocessor technology, focusing on both the internal design and external interfaces. The standard outlines systematic evaluation approaches addressing essential functions, properties, and environmental influences, to ensure reliable performance and support cost-effective deployment.
Key Topics
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Microprocessor-Based Instrument Evaluation:
The standard details a comprehensive evaluation framework, ensuring that instruments function accurately, reliably, and efficiently within their intended environment.
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System Approach:
A key methodological aspect is treating each instrument as a system defined by its elements, functions, properties, and external influencing conditions.
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Functional Block Identification:
IEC TS 62098 encourages evaluators to identify major function blocks, analyze information flows, and clarify instrument boundaries.
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Checklists and Evaluation Matrix:
Using structured checklists, users can identify functions and properties embedded in each function block. The evaluation matrix model helps map out the test criteria for each property and condition.
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Instrument Interfaces:
Detailed attention is given to the multiple domains interacting with instruments, including process, human operator, utility, environment, task, hardware, external systems, and time domain.
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Performance and Reliability Testing:
The standard emphasizes tests for functional operation, accuracy, dependability, responsiveness, and operability. Maintenance, safety, and field testing are also referenced for comprehensive assessment.
Applications
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Industrial Automation:
The methods in IEC TS 62098 are mainly applicable to microprocessor-based instruments used in industrial process control, including transmitters, controllers, and intelligent actuators.
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Integration in Digital Communication Systems:
With the increasing incorporation of instruments into digital networks, the standard helps evaluate devices’ communication interfaces and interaction with distributed control systems.
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Selection and Procurement:
By providing a basis for comparing different manufacturers' products, the standard facilitates informed procurement and system integration decisions.
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Quality Assurance and Maintenance:
Applying these evaluation methods supports long-term reliability, reduces downtime, and aids in predictive maintenance planning.
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Lifecycle Cost Assessment:
The guidelines assist organizations in estimating total cost of ownership by factoring in installation, maintenance, operation, and replacement costs for measurement and control devices over their lifespan.
Related Standards
Several related international standards complement IEC TS 62098, offering further guidance for evaluating and utilizing process measurement and control instruments:
- IEC 60050-351: International Electrotechnical Vocabulary – Part 351: Automatic control
- IEC 60546 (all parts): Controllers with analogue signals for industrial-process control systems
- IEC 60770-1: Transmitters for use in industrial-process control systems – Performance evaluation
- IEC 61069 (all parts): Evaluation of system properties for system assessment in industrial-process measurement and control
- IEC 61298 (all parts): General evaluation methods for process measurement and control devices
Practical Value
IEC TS 62098:2000 provides a flexible yet thorough framework for the evaluation of microprocessor-based instruments, ensuring that complex digital devices can be benchmarked, validated, and selected according to international best practices. Through its structured approach and attention to real-world interfacing and performance, the standard supports the deployment of robust, high-quality process control solutions across varied industrial environments.
Keywords: IEC TS 62098, evaluation methods, microprocessor-based instruments, industrial process measurement and control, performance testing, reliability testing, instrument evaluation, standards for instrumentation, system assessment, process automation.