BS IEC 62899-302-2-2018 PDF

Full title and description

BS IEC 62899-302-2:2018 — Printed electronics. Equipment. Inkjet. Imaging-based measurement of droplet volume. This is the British adoption (BS) of IEC 62899-302-2:2018 and specifies an imaging-based, drop-in-flight method to determine accurate inkjet droplet volume for printed-electronics and related inkjet equipment measurement and QA purposes.

Abstract

IEC 62899-302-2:2018 defines procedures and measurement considerations for determining droplet volume from images acquired by drop-in-flight (drop-watcher) imaging systems. It describes the measurement principle, image acquisition and processing, limits to measurement accuracy and applicability; it explicitly excludes imaging techniques based on interference fringes (for example holography or phase doppler anemometry) and may not be applicable to continuous inkjet or some liquid-dispensing systems.

General information

• Status: Published / active (British adoption of an IEC international standard).
• Publication date: IEC original publication: 7 May 2018; BS adoption publication: 18 May 2018.
• Publisher: British Standards Institution (BSI) — adoption of the International Electrotechnical Commission (IEC) document (IEC TC 119 responsible).
• ICS / categories: 19.080 (Electrical and electronic testing); 37.100.10 (Reproduction equipment).
• Edition / version: Edition 1.0 (2018).
• Number of pages: IEC edition: 17 pages; BS published copy commonly listed as 20 pages (format / national front matter can change page count).

Scope

This part of IEC 62899 specifies a standardized method to determine inkjet droplet volume from visual images captured while drops are in flight (drop-in-flight/drop-watcher imaging). It covers the measurement concept, recommended image acquisition and processing steps, definitions, uncertainty considerations and reporting elements, and describes limits of applicability (for example exclusions for interference-based systems and potential inapplicability to continuous-jet or non-standard liquid-dispensing systems). The procedure is intended primarily for drop-on-demand inkjet systems used in printed electronics equipment.

Key topics and requirements

• Definition of measurement concept for imaging-based droplet-volume determination (drop-in-flight principles).
• Instrument and imaging requirements: camera/frame rate, optics, illumination, drop-watcher alignment and focus rules.
• Image-processing and analysis steps to extract droplet boundary and compute volume (including assumptions about spherical or near-spherical shape and required corrections).
• Calibration, traceability and recommended reference procedures to control systematic errors.
• Uncertainty evaluation and discussion of measurement limits (sources of bias and random error, repeatability and reproducibility guidance).
• Applicability and limitations (exclusions for interference/holographic techniques and caveats for continuous-jet or non-standard fluids).
• Recommended test report content to ensure repeatability and comparability between laboratories and suppliers.

Typical use and users

Typical users include manufacturers of inkjet printheads and inkjet-based printed-electronics equipment, R&D teams developing inks and printing processes, metrology and QA laboratories performing performance verification of jetting systems, and conformity/acceptance test facilities. The standard is also used by test-equipment suppliers that build drop-watchers and by standards committees and accreditation bodies for defining measurement practices.

Related standards

This part is a member of the IEC 62899 series on printed electronics and is closely related to other parts in the 302 subseries that address inkjet in-flight measurements (for example IEC 62899-302-1:2017 on imaging-based measurement of jetting speed and IEC 62899-302-3:2021 on imaging-based measurement of drop direction). Other IEC 62899 parts (301 series and 301-3, etc.) cover complementary measurement and equipment topics in printed electronics.

Keywords

printed electronics; inkjet; droplet volume; drop-in-flight; drop watcher; imaging-based measurement; metrology; measurement uncertainty; IEC 62899; TC 119.

FAQ

Q: What is this standard?

A: BS IEC 62899-302-2:2018 is the British adoption of IEC 62899-302-2:2018. It standardizes an imaging-based method for measuring inkjet droplet volume using drop-in-flight (drop-watcher) systems.

Q: What does it cover?

A: It covers the measurement concept, equipment and imaging requirements, image processing and volume calculation methods, calibration and traceability recommendations, uncertainty assessment, limits of applicability and required test-report content. It excludes interference-based imaging techniques (e.g., holography or phase Doppler) and is mainly aimed at drop-on-demand inkjet systems.

Q: Who typically uses it?

A: Equipment and printhead manufacturers, ink and process developers, QA and metrology laboratories, test-equipment vendors, and standards/accreditation bodies working in printed electronics and inkjet metrology.

Q: Is it current or superseded?

A: The IEC edition was published in May 2018 and listed as active/valid; national adoption as BS was published in May 2018. There are no widely published amendments or supersessions to this part as of its listing; the IEC webstore lists a stability date for several 62899 parts in the late 2020s. Users should check their national catalogue or IEC webstore for any amendments or a newer edition before relying on the standard for regulatory or procurement requirements.

Q: Is it part of a series?

A: Yes — it is part of the IEC 62899 printed-electronics series (equipment measurement parts). The 302 subseries covers inkjet in-flight measurements with companion parts addressing jetting speed (302‑1), droplet direction (302‑3) and related measurement methods.

Q: What are the key keywords?

A: printed electronics; inkjet; droplet volume; drop-in-flight; drop watcher; imaging-based metrology; measurement uncertainty; calibration; IEC 62899; TC 119.