VDI 2048 Blatt-1 2017-09 PDF

Full title and description

VDI 2048 Blatt 1: Control and quality improvement of process data and their uncertainties by means of correction calculation for operation and acceptance tests. (German title: Kontrolle und Verbesserung der Qualität von Prozessdaten und deren Unsicherheiten mittels Ausgleichsrechnung bei Betriebs- und Abnahmemessungen).

Abstract

This guideline defines a procedure for evaluating and improving the quality of process measurement data and for quantifying their uncertainties using correction (adjustment) calculation methods. It is intended primarily for operational, supervision and acceptance (site) tests of plants in energy technology and the chemical industry but can be applied generally for measurement quality assurance.

General information

• Status: Current / active technical rule (AKTUELL).
• Publication date: 2017-09 (edition VDI 2048 Blatt 1:2017-09).
• Publisher: VDI – Verein Deutscher Ingenieure e.V. (VDI standards).
• ICS / categories: 17.020 (Metrology and measurement in general), 27.010 (Energy and heat transfer engineering in general).
• Edition / version: 2017-09 (current edition); corrigendum issued 2019-01.
• Number of pages: 100.

Scope

Applies to operational, supervisory and acceptance measurements on plants in energy technology and chemical industry. Describes an evaluation workflow that uses redundant measurements and adjustment (least-squares) techniques to determine the most probable plant state, improve information value of data, and provide a basis for quality assurance and for demonstrating agreed technical properties during acceptance testing. The guideline also contains requirements that allow software implementations to be assessed against specified criteria.

Key topics and requirements

• Definition of measurement objectives for operational and acceptance testing.
• Evaluation and improvement of process data quality using correction (adjustment) calculations and redundancy.
• Quantification and propagation of measurement uncertainties within the adjustment framework.
• Application of least-squares / matrix adjustment methods to reconcile inconsistent measurements.
• Guidance on documentation, traceability and reporting of results for acceptance and supervisory purposes.
• Annex/criteria enabling certification or assessment of software tools that implement the procedure.

Typical use and users

Used by metrology engineers, test and commissioning teams, plant operators, measurement and control engineers, independent test laboratories and certification bodies involved in acceptance and performance testing of energy and chemical plants. Also relevant for developers of measurement-evaluation software and quality-assurance specialists responsible for uncertainty assessment in plant testing.

Related standards

Part of the VDI 2048 series. This edition replaces VDI 2048 Blatt 1:2000-10. Companion documents in the series (Blatt 2, Blatt 3) provide worked examples and application guidance for preparing and evaluating acceptance measurements. A corrigendum to VDI 2048 Blatt 1 was published in 2019.

Keywords

measurement uncertainty, adjustment calculation, least-squares, acceptance testing, operational testing, process data quality, energy plants, chemical industry, VDI 2048.

FAQ

Q: What is this standard?

A: VDI 2048 Blatt 1 is a VDI technical guideline that specifies methods to control and improve the quality of process measurement data and to determine their uncertainties by means of correction/adjustment calculations for operation and acceptance tests.

Q: What does it cover?

A: It covers procedures to plan, evaluate and reconcile measurement data (including redundant measurements), quantify uncertainties, apply adjustment (least-squares) techniques, and document results for acceptance and supervisory testing of energy and chemical plant installations. It also includes criteria for assessing software implementations.

Q: Who typically uses it?

A: Metrologists, plant test and commissioning teams, measurement engineers, testing laboratories, certification bodies and software vendors implementing measurement-evaluation tools for plant acceptance and performance verification.

Q: Is it current or superseded?

A: The 2017-09 edition is the currently referenced VDI 2048 Blatt 1 (it replaces the 2000-10 version). A corrigendum was issued in January 2019 to correct/clarify parts of the 2017 text. Users should apply the corrigendum together with the 2017 edition.

Q: Is it part of a series?

A: Yes — it is part of the VDI 2048 series (multiple "Blatt" documents). Blatt 2 and Blatt 3 provide examples and application-specific guidance related to preparation and evaluation of acceptance measurements.

Q: What are the key keywords?

A: Measurement uncertainty, correction calculation, adjustment, least-squares, acceptance testing, process data quality, VDI 2048.