ISO 16900-9-2015 PDF

Full title and description

St ISO 16900-9-2015 — Respiratory protective devices — Methods of test and test equipment — Part 9: Determination of carbon dioxide content of the inhaled gas. This part of the ISO 16900 series specifies laboratory test methods and measurement procedures used to determine the increased carbon dioxide (CO2) concentration in the gas inhaled by a wearer as a result of using a respiratory protective device (RPD).

Abstract

ISO 16900-9:2015 defines procedures for measuring the carbon dioxide content of the inhaled gas when an RPD is worn under specified test conditions. The standard addresses test arrangements, instrumentation, breathing patterns or simulators, sampling points and data reporting necessary to quantify any CO2 build‑up attributable to the device. Closed‑circuit supplied breathable‑gas RPD are excluded from this part. The standard is intended to ensure repeatable, comparable laboratory determinations of inhaled‑gas CO2 for product development, type testing and regulatory assessment.

General information

• Status: Published (confirmed on systematic review).
• Publication date: 8 October 2015 (Edition 1, 2015).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 13.340.30 (Respiratory protective devices).
• Edition / version: Edition 1 (2015).
• Number of pages: 18 pages.

Scope

This standard specifies test methods to determine the increased carbon dioxide concentration of the inhaled gas that is attributable to wearing a respiratory protective device. It covers laboratory arrangements, measurement equipment, breathing simulators or specified human breathing patterns, sampling and analytical techniques, test sequences and report content. The scope excludes closed‑circuit supplied breathable‑gas respirators and focuses on devices where rebreathing or exhaled‑gas retention can affect inhaled CO2.

Key topics and requirements

• Definition of the test setup: breathing machine/metabolic simulator, headform or human test subject arrangements, and sample ports.
• Specified breathing patterns and workloads to simulate typical use (resting, work rates as defined in related parts).
• Sampling and analytical methods for measuring CO2 concentration in inhaled gas (instrumentation accuracy, calibration and sampling location requirements).
• Requirements for environmental and test‑chamber conditions (temperature, humidity, background CO2 control).
• Test sequences, equilibration procedures and data recording/averaging rules.
• Reporting requirements: test method, specimen identification, test conditions, raw and processed CO2 results, uncertainty and any deviations.
• Exclusions and special cases: closed‑circuit supplied breathable‑gas RPD are excluded; cross‑references to consolidated test methods in other parts of the ISO 16900 series (for certain device types).

Typical use and users

ISO 16900-9 is used by RPD manufacturers during product design and validation, independent test laboratories performing type/series testing, conformity assessment and certification bodies, occupational hygienists and safety engineers assessing user physiological burden, and regulatory or procurement authorities requiring documented inhaled‑gas CO2 performance data.

Related standards

ISO 16900-9 is part of the ISO 16900 series on test methods for respiratory protective devices. Closely related documents include ISO 16900-1 (general test methods and inward leakage testing principles), ISO 16900-5 (breathing machines, metabolic simulators and test fixtures), ISO 16900-13 (consolidated tests for supplied‑gas and special application RPD), and human‑factors/anthropometry guidance in ISO/TS 16976-2. Performance and classification standards (ISO 17420 series) are also commonly used alongside ISO 16900 test methods.

Keywords

respiratory protective devices, RPD, carbon dioxide, CO2, inhaled gas, breathing simulator, test method, inhaled‑gas analysis, ISO 16900, test equipment, inhalation exposure

FAQ

Q: What is this standard?

A: ISO 16900-9:2015 is a test‑method standard that specifies how to measure the carbon dioxide content of the gas inhaled by a wearer of a respiratory protective device, under controlled laboratory conditions.

Q: What does it cover?

A: It covers laboratory test arrangements, breathing patterns or simulators, sampling and analytical techniques for CO2, test conditions and reporting procedures used to quantify any CO2 accumulation in the inhaled gas attributable to the RPD. Closed‑circuit supplied‑gas respirators are excluded.

Q: Who typically uses it?

A: RPD manufacturers, independent test laboratories, certification and conformity assessment bodies, occupational health professionals, and procurement or regulatory organizations use this standard when evaluating inhaled‑gas CO2 performance.

Q: Is it current or superseded?

A: This is the first (2015) edition. It was published in October 2015 and was subject to ISO’s systematic five‑year review cycle; the edition has been reviewed and confirmed in a subsequent review, and remains the current published version pending any future revisions.

Q: Is it part of a series?

A: Yes. ISO 16900-9 is one part of the ISO 16900 series of test methods and test equipment standards for respiratory protective devices; other parts address inward leakage, breathing machines, consolidated supplied‑gas tests and related test methods.

Q: What are the key keywords?

A: Key keywords are carbon dioxide, CO2, inhaled gas, respiratory protective device, RPD, test method, breathing simulator, inhaled‑gas analysis, and ISO 16900.