VDI 2048 Blatt-2 2018-06 PDF

Full title and description

STB VDI 2048 Blatt-2 2018-06 — Control and quality improvement of process data and their uncertainties by means of correction calculation for operation and acceptance tests — Examples, especially retrofit measures. This item corresponds to VDI 2048 Blatt 2:2018‑06 (original German/English guideline) and is commonly listed by distributors both under the VDI designation and under regional/adopted codes such as “STB VDI …”.

Abstract

The guideline gives worked examples and practical assistance for applying the procedure described in VDI 2048 Part 1 to real operating and acceptance measurements. It focuses on correction (adjustment) calculations (Ausgleichsrechnung) to improve measured process data and to quantify their uncertainties, shows how to determine covariances and partial derivatives, and includes examples — notably a retrofit example — and supporting demonstration material. The publication is aimed at enabling objective quality control of measurements and clearer statements about the probability that required properties are met.

General information

• Status: Active / Current.
• Publication date: 2018-06 (01 June 2018).
• Publisher: Verlag des Vereins Deutscher Ingenieure (VDI Verlag).
• ICS / categories: 17.020 (Metrology and measurement in general); 27.010 (Energy and heat transfer engineering in general).
• Edition / version: VDI 2048 Blatt 2:2018-06 (Part 2, 2018 edition).
• Number of pages: 55 pages.

Scope

Provides practical examples and guidance for applying the correction-calculation procedure to operating and acceptance measurements with the goal of improving data quality and quantifying uncertainties. The scope covers calculation of covariances, automatic generation of partial derivatives, handling auxiliary variables and inequalities, analysis of influences on result uncertainty, extended analysis of serious errors, and a retrofit example that demonstrates covariance effects in retrofit/upgrade measurement situations. The document complements the theoretical material in VDI 2048 Blatt 1 by giving worked examples and applied advice.

Key topics and requirements

• Correction (adjustment) calculation (Ausgleichsrechnung) for process and acceptance data.
• Determination and use of covariances between measured variables.
• Propagation of uncertainties and influence analysis for result variables.
• Automatic generation of partial derivatives and use of auxiliary variables.
• Treatment of inequalities and extended analysis of serious measurement errors.
• Worked examples with particular focus on retrofit scenarios and practical implementation hints (including programming/demonstration material).

These topics are presented with the aim of producing traceable, statistically justified statements about measurement results and acceptance criteria.

Typical use and users

Intended for engineers and specialists involved in commissioning, acceptance testing and operation of energy-conversion and process installations — for example commissioning engineers, test engineers, metrologists, plant operators, consultants and researchers working with measurement uncertainty and quality assurance in energy and heat-transfer systems. It is also used by software developers and analysts implementing correction-calculation workflows for measurement data validation.

Related standards

Directly related to VDI 2048 Blatt 1 (fundamentals and procedure) and other parts of the VDI 2048 series (examples and application guidance). VDI 2048 Blatt 2:2018-06 replaces the earlier VDI 2048 Blatt 2:2003-08; users should consult Blatt 1 for the theoretical basis and any later VDI 2048 parts for further examples or updates.

Keywords

measurement uncertainty, Ausgleichsrechnung, correction calculation, covariance, partial derivatives, acceptance testing, retrofit example, process data quality, commissioning, VDI 2048.

FAQ

Q: What is this standard?

A: VDI 2048 Blatt 2:2018-06 is part of the VDI guideline series on quality control and uncertainty assessment for operation and acceptance measurements; it provides worked examples and application guidance for the correction‑calculation method.

Q: What does it cover?

A: It covers practical examples for improving measurement data quality by means of correction calculations, calculation and use of covariances, propagation of uncertainties, auxiliary variables, handling inequalities, extended error analysis and a detailed retrofit example to demonstrate real‑world application.

Q: Who typically uses it?

A: Commissioning/test engineers, metrologists, plant operators, consultants and software engineers responsible for measurement validation, acceptance testing and uncertainty evaluation in energy and process engineering.

Q: Is it current or superseded?

A: The 2018-06 edition (VDI 2048 Blatt 2:2018-06) is the current edition and supersedes the older 2003-08 Blatt 2. Users should check for any later corrigenda or new parts within the VDI 2048 series.

Q: Is it part of a series?

A: Yes — it is Part 2 of the VDI 2048 guideline series. Consult VDI 2048 Blatt 1 for fundamentals and other Blatt (parts) for additional examples and application guidance.

Q: What are the key keywords?

A: Measurement uncertainty, covariance, correction calculation (Ausgleichsrechnung), acceptance testing, process data quality, retrofit, partial derivatives, auxiliary variables.