ISO 4185-1980 cor1-1993 PDF

Full title and description

ISO 4185:1980/Cor 1:1993 — Measurement of liquid flow in closed conduits — Weighing method — Technical Corrigendum 1. This corrigendum corrects the notation in subclause 1.5 and fixes equation (1) of Annex C of the original ISO 4185:1980 text.

Abstract

This one-page technical corrigendum amends the original ISO 4185:1980 weighing-method procedure for measuring liquid flow in closed conduits by correcting a notation entry (subclause 1.5) and a formula (equation (1) in Annex C). The original standard specifies apparatus, test procedure, calculation of flow rate and associated uncertainties for non‑corrosive, non‑toxic liquids delivered into a weighing tank over a known time interval.

General information

• Status: Published (technical corrigendum to ISO 4185:1980).
• Publication date: 1993-11 (Corrigendum 1). The parent standard ISO 4185 was published 1980-12.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 17.120.10 (Hydrometry / Flow measurement).
• Edition / version: Corrigendum 1 to Edition 1 of ISO 4185:1980 — designation ISO 4185:1980/Cor 1:1993.
• Number of pages: 1 (corrigendum document).

Scope

This corrigendum applies specifically to ISO 4185:1980. It corrects the notation given in subclause 1.5 and replaces equation (1) in Annex C so that calculations and expressed quantities in the weighing-method procedure are consistent and unambiguous. The underlying standard governs determination of liquid flow rate by measuring the mass of liquid delivered into a weighing tank over a known time interval and excludes corrosive or toxic liquids.

Key topics and requirements

• Correction to notation (subclause 1.5) to remove ambiguity in variable definitions and symbols.
• Replacement/correction of equation (1) in Annex C to ensure correct calculation of derived quantities (affecting flow-rate computation or uncertainty evaluation).
• Clarifies application of the weighing method described in ISO 4185:1980 (apparatus, procedure, timing and mass measurement).
• Maintains the original scope limitations (not intended for corrosive or toxic liquids).
• Intended to be applied together with the full ISO 4185:1980 text; the corrigendum does not change procedural steps beyond correcting the noted items.

Typical use and users

Laboratories and test facilities performing primary or reference measurements of liquid flow by weighing; national and industrial metrology institutes; calibration laboratories; researchers and engineers working on flowmeter calibration, flow-system verification and uncertainty analysis in water, chemical and petroleum industries; standards bodies and technical committees referencing or implementing ISO 4185 procedures.

Related standards

Directly related: ISO 4185:1980 (the original standard). Other standards commonly used alongside or for alternative flow-measurement methods include ISO 3354 (velocity-area/current-meter methods for closed conduits), ISO 5167 (measurement of fluid flow by pressure-differential devices), and ISO 3170/ISO 3171 (sampling of petroleum liquids). Users often consult these standards when selecting or validating a measurement method for a specific application.

Keywords

ISO 4185, corrigendum, weighing method, liquid flow measurement, closed conduits, flow metrology, calibration, uncertainty, notation correction, Annex C equation

FAQ

Q: What is this standard?

A: This document is Technical Corrigendum 1 to ISO 4185:1980 (designation ISO 4185:1980/Cor 1:1993). It is a one‑page correction that updates notation and a formula in the original ISO 4185 text.

Q: What does it cover?

A: It corrects subclause 1.5 (Notation) and equation (1) of Annex C in ISO 4185:1980 so that the weighing-method procedures and related calculations are accurate and unambiguous. It does not introduce new procedural content beyond those corrections.

Q: Who typically uses it?

A: Metrology institutes, calibration and testing laboratories, engineers and researchers involved in precise liquid flow measurements by weighing, and standards committees or organizations that reference ISO 4185.

Q: Is it current or superseded?

A: The corrigendum was published in 1993 and applies to the 1980 edition of ISO 4185. Users should verify the current status of ISO 4185 and any later revisions or replacements with ISO (the publisher) or their national standards body to ensure there have been no subsequent amendments or supersessions after the corrigendum.

Q: Is it part of a series?

A: The corrigendum is tied to ISO 4185:1980 (Measurement of liquid flow in closed conduits — Weighing method). ISO 4185 sits within the broader family of ISO standards on flow measurement and hydrometry; related standards cover alternative measurement methods and sampling procedures.

Q: What are the key keywords?

A: Weighing method, liquid flow, closed conduits, corrigendum, notation correction, flow-rate calculation, uncertainty, ISO 4185.