DIN EN ISO 6416 2019-03 PDF

Full title and description

STB DIN EN ISO 6416 2019-03 — Hydrometry: Measurement of discharge by the ultrasonic transit time (time‑of‑flight) method. This designation refers to the national (DIN/EN) adoption issued March 2019 of the international standard that describes establishment, instrumentation, operation and commissioning procedures for continuous ultrasonic (transit‑time) gauging of discharge in rivers, open channels and closed conduits.

Abstract

Defines the transit‑time ultrasonic method for measuring flow (time‑of‑flight of ultrasonic pulses), including principles of operation, station establishment, instrumentation performance, commissioning procedures and limitations. The method is limited to transit‑time techniques (not Doppler, correlation or level‑to‑flow) and is not applicable to rivers with ice; IEC 60041 is referenced for full‑pipe measurement contexts.

General information

• Status: Published (national adoption of the ISO document).
• Publication date: 01 March 2019 (DIN EN ISO national adoption date).
• Publisher: DIN (as DIN EN ISO adoption) — original international source: ISO (ISO 6416:2017).
• ICS / categories: 17.120.20 (Hydrometry — flow in open channels).
• Edition / version: National adoption (DIN EN ISO 6416, 2019) based on ISO 6416:2017 (Edition 4). ISO 6416:2017 was reviewed and confirmed in 2023.
• Number of pages: Approx. 70–74 pages for the DIN publication (national PDF layout varies; ISO edition typically 58 pages).

Scope

Specifies establishment and operation of ultrasonic transit‑time (time‑of‑flight) gauging stations for continuous discharge measurement in rivers, open channels and closed conduits where the transit‑time technique is applicable. It covers instrument performance, installation considerations, measurement procedures and commissioning tests but excludes Doppler, correlation and level‑to‑flow techniques and ice‑affected waterways; for full‑pipe applications, IEC 60041 is recommended.

Key topics and requirements

• Principles of transit‑time ultrasonic measurement and applicable flow conditions.
• Design and siting of a gauging station for reliable transit‑time measurement.
• Instrumentation requirements, minimum performance and calibration/verification procedures.
• Commissioning tests and acceptance criteria for continuous discharge records.
• Data handling, uncertainty assessment and reporting requirements for measured discharge.
• Limitations and non‑applicability (Doppler/correlation/level‑to‑flow methods; ice conditions).

Typical use and users

Used by hydrometric agencies, water resource and environmental authorities, consulting hydrologists, research institutions, instrument manufacturers and field technicians for establishing continuous flow monitoring stations, validating instrument performance, and preparing commissioning and QA/QC procedures for transit‑time ultrasonic flow systems.

Related standards

ISO 6416 is part of the hydrometry family of standards produced by ISO/TC 113. It references IEC 60041 for full‑pipe applications and is often used alongside national EN/DIN adoptions and other hydrometry documents covering level measurement, rating curves and verification.

Keywords

hydrometry, ultrasonic transit‑time, time‑of‑flight, discharge measurement, flow monitoring, gauging station, commissioning, IEC 60041, ISO 6416.

FAQ

Q: What is this standard?

A: An international hydrometry standard adopted nationally (DIN EN ISO 6416 2019‑03) that specifies how to measure continuous discharge using the ultrasonic transit‑time (time‑of‑flight) technique.

Q: What does it cover?

A: Station design and siting, instrumentation performance and installation, commissioning procedures, measurement practice, uncertainty assessment and reporting specific to transit‑time ultrasonic flow measurement; it excludes Doppler, correlation and level‑to‑flow techniques and ice‑affected conditions.

Q: Who typically uses it?

A: Hydrometric and water resource agencies, consulting engineers, instrument manufacturers, researchers and field technicians responsible for flow monitoring and gauging‑station commissioning.

Q: Is it current or superseded?

A: The ISO base document is ISO 6416:2017 (Edition 4) and was reviewed/confirmed in 2023, so the international text remains current; the DIN EN ISO national adoption was published 01 March 2019. Users should check their national standards body for any subsequent national amendments.

Q: Is it part of a series?

A: It belongs to the hydrometry standards maintained by ISO/TC 113 (flow and related measurements) and is typically used together with other hydrometry and instrumentation standards (e.g., IEC 60041 for full‑pipe measurement).

Q: What are the key keywords?

A: Ultrasonic transit‑time, time‑of‑flight, discharge measurement, hydrometry, gauging station, commissioning, flow monitoring.