SIST EN ISO 8655-4:2022 PDF

Name: SIST EN ISO 8655-4:2022 — Piston-operated volumetric apparatus - Part 4: Dilutors (ISO 8655-4:2022)
SKU: SIST EN ISO 8655-4:2022
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Piston-operated volumetric apparatus - Part 4: Dilutors (ISO 8655-4:2022)

Название (английский):

SIST EN ISO 8655-4:2022

Piston-operated volumetric apparatus - Part 4: Dilutors (ISO 8655-4:2022)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 23 мая 2022 г.
Издание:: ISO/DIS 8655-4:2020
ICS:: 17.060

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Описание (английский):

This document specifies — metrological requirements, — maximum permissible errors, — requirements for marking and — information to be provided for users, for dilutors with a sample uptake capacity (In) from 5 μl to 1 ml and a diluent capacity (Ex) from 50 μl to 100 ml. They are designed to deliver the sample and diluent together in measured proportion and measured volume.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 8655-4:2022 - "Piston-operated volumetric apparatus - Part 4: Dilutors" specifies metrological requirements, maximum permissible errors, marking and user information for laboratory dilutors. The standard applies to dilutors with a sample uptake capacity (In) of 5 µl to 1 ml and a diluent capacity (Ex) of 50 µl to 100 ml. It replaces the 2002 edition and aligns dilutor testing and documentation with the ISO 8655 series for piston-operated volumetric apparatus.

Key topics and requirements

Scope and principle: Defines operation of dilutors that aspirate a measured sample and deliver it together with a measured diluent volume; covers manual, electrical, pneumatic or hydraulic drives and hand‑held, bottle‑top or bench‑top configurations, including automated analyser components.

Metrological performance: Requires determination of system trueness and precision using gravimetric methods (total system includes pistons, valves, drive, uptake/delivery probe, tubing and any change‑over unit).

Maximum permissible errors (MPEs): Tables list MPEs for nominal volumes; the standard also gives a formula to calculate MPEs for selected volumes:

e_Vs = (V_nom / V_s) × e_Vnom
Values do not apply below 10% of nominal volume; calculated MPEs are capped at 25%.

Adjustment: Specifies initial and subsequent adjustment procedures and reference conditions (standard reference temperature 20 °C or 27 °C, 50% RH, 101.3 kPa, using grade 3 water per ISO 3696).

Marking and user information: Requires clear marking and detailed manufacturer instructions, including evidence and records when subsequent adjustments are performed.

Testing references: Measurement and verification by ISO 8655-6 (gravimetric reference procedure) or ISO 8655-7 (alternative procedures).

Practical applications and users

Manufacturers - product design, quality control and performance declarations for dilutors.

Calibration laboratories and test houses - to perform verification, calibration and routine checks using standardized gravimetric methods.

Clinical, pharmaceutical and research laboratories - to select and validate dilutors for sample preparation, serial dilution and automated workflows.

Regulatory and QA teams - to ensure documented compliance of volumetric dilutor equipment.

Adoption of this standard helps ensure accurate, traceable dilution steps, reduce assay variability and support compliance in laboratory workflows.

Related standards

ISO 8655-1 - Terminology, general requirements and user recommendations

ISO 8655-6 - Gravimetric reference measurement procedure for determination of volume

ISO 8655-7 - Alternative measurement procedures for determination of volume

Keywords: EN ISO 8655-4:2022, dilutors, piston-operated volumetric apparatus, metrological requirements, maximum permissible errors, gravimetric measurement, calibration, laboratory equipment.

SIST EN ISO 8655-4:2022 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Practical applications and users

Related standards

Технические детали

ISO 8655-4:2022

Piston-operated volumetric apparatus — Part 4: Dilutors

ISO 8655-10:2024

Piston-operated volumetric apparatus — Part 10: User guidance, and requirements for competence, training, and…

SIST EN ISO 3696:1998

Water for analytical laboratory use - Specification and test methods (ISO 3696:1987)

SIST EN ISO 8655-6:2022

Piston-operated volumetric apparatus - Part 6: Gravimetric reference measurement procedure for the determinat…

SIST EN ISO 8655-7:2022/A1:2025

Piston-operated volumetric apparatus - Part 7: Alternative measurement procedures for the determination of vo…