VDI VDE 3514 Blatt 1 E 2014-07 PDF

Full title and description

STB VDI VDE 3514 Blatt 1 E 2014-07 — Measurement of gas humidity: Characteristics and symbols. This document defines the parameters, symbols and formulae used to describe gas (air) humidity and to provide a uniform basis for specifying and comparing humidity sensors and measurements.

Abstract

The standard establishes agreed terminology, characteristic quantities, symbols and representative formulae for the measurement of gas humidity. Its purpose is to harmonize differing definitions and notations in the field so that humidity sensors, measurement results and specifications can be described and compared consistently across manufacturers and users.

General information

• Status: Withdrawn / replaced (the 2014-07 edition was superseded by VDI/VDE 3514 Blatt 1:2016-11).
• Publication date: Edition E — July 2014 (2014-07).
• Publisher: VDI in cooperation with VDE (VDI/VDE technical guideline).
• ICS / categories: 07.030 (Physics; measurement of humidity and related quantities).
• Edition / version: E (English-language edition), 2014-07 (later edition issued 2016-11).
• Number of pages: 16 pages.

Scope

The document covers definitions of humidity-related quantities (e.g., relative humidity, absolute humidity, mixing ratio), the recommended symbols and units, and key formulae used in gas-humidity measurement (including formulations for saturation vapor pressure). It provides a common vocabulary and notation so that sensor characteristics and measurement results can be documented and compared unambiguously across applications and suppliers. The scope is limited to definitions, symbols and characteristic expressions rather than detailed test procedures (which are addressed in other parts of the VDI/VDE 3514 series).

Key topics and requirements

• Standardized definitions of humidity quantities (relative humidity, water vapor partial pressure, dew point, absolute humidity, mixing ratio).
• Recommended symbols and unit notation for humidity-related parameters to ensure consistent documentation.
• Representative formulae (including saturation vapor pressure relationships) and example calculations to convert between humidity measures.
• Reference conditions and notes on traceability and comparability of sensor specifications.
• Cross-references to measurement-method guidance in other parts of the VDI/VDE 3514 series (e.g., Blatt 2 and beyond).

Typical use and users

Used by manufacturers of humidity sensors and instrumentation, calibration and testing laboratories, HVAC and process engineers, environmental monitoring specialists, and standards/quality engineers who need a consistent set of symbols and definitions when specifying, comparing or reporting humidity measurements and sensor data. It is typically used together with the measurement-method parts of the VDI/VDE 3514 series when selecting or testing sensors for specific applications.

Related standards

Other parts of the VDI/VDE 3514 series (for example Blatt 2 — Measurement of humidity: Methods of measurement) and earlier or later editions of Blatt 1 (2007, 2014 draft edition and the formally published 2016-11 edition). The document is intended to be used alongside national and international guidance on humidity measurement and calibration practice.

Keywords

gas humidity; humidity measurement; measurement of humidity; symbols; units; saturation vapor pressure; dew point; relative humidity; VDI/VDE 3514.

FAQ

Q: What is this standard?

A: VDI/VDE 3514 Blatt 1 (E 2014-07) is a guideline that defines the characteristic quantities, symbols and representative formulae used for gas-humidity measurement to harmonize terminology and notation.

Q: What does it cover?

A: It covers definitions (e.g., relative humidity, absolute humidity, mixing ratio), recommended symbols and units, and common formulae (including saturation vapor pressure relations) for describing and reporting humidity measurements; it does not prescribe detailed measurement procedures (these are in other parts of the series).

Q: Who typically uses it?

A: Sensor and instrument manufacturers, test and calibration laboratories, HVAC and process engineers, environmental monitoring professionals and standards engineers who need consistent notation and definitions for humidity data and sensor specifications.

Q: Is it current or superseded?

A: The 2014-07 edition (E) was later superseded by a subsequent edition published in November 2016 (VDI/VDE 3514 Blatt 1:2016-11); the 2014 draft/edition is therefore withdrawn/replaced by the 2016-11 release. Users should refer to the 2016 edition for the current text.

Q: Is it part of a series?

A: Yes — it is part of the VDI/VDE 3514 series on gas-humidity measurement; other parts (for example Blatt 2 and Blatt 4) cover measurement methods and application-specific guidance.

Q: What are the key keywords?

A: Gas humidity, humidity measurement, relative humidity, saturation vapor pressure, dew point, humidity symbols, VDI/VDE 3514.