ISO 7176-21-2009 PDF

Full title and description

Wheelchairs — Part 21: Requirements and test methods for electromagnetic compatibility of electrically powered wheelchairs and scooters, and battery chargers. Specifies EMC (electromagnetic emissions and immunity) requirements and associated test methods for electrically powered wheelchairs, scooters and their battery chargers, and for manual wheelchairs fitted with add-on power kits.

Abstract

ISO 7176-21:2009 defines the limits, test conditions and procedures used to evaluate electromagnetic emissions and electromagnetic immunity of electrically powered wheelchairs and scooters with a maximum speed not exceeding 15 km/h, and of battery chargers intended for use with those devices. The document includes reference configurations for adjustable devices to enable comparable test results and excludes vehicles designed to carry more than one person.

General information

• Status: Withdrawn (superseded).
• Publication date: April 2009.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 11.180.10, 33.100.01.
• Edition / version: Edition 2 (2009).
• Number of pages: 20 (original ISO publication).

Scope

This part of ISO 7176 specifies requirements and test methods for electromagnetic emissions and for electromagnetic immunity of electrically powered wheelchairs and scooters intended for indoor and/or outdoor use by people with disabilities (maximum speed not more than 15 km/h). It is also applicable to manual wheelchairs fitted with add-on power kits. The standard covers battery chargers intended for use with these devices. It is not applicable to vehicles designed to carry more than one person. A reference configuration for adjustable chairs and scooters is provided to permit comparison of test results.

Key topics and requirements

• Limits and measurement procedures for electromagnetic emissions from powered wheelchairs and scooters.
• Immunity test methods covering common disturbances (radiated and conducted immunity) to ensure safe operation in real-world electromagnetic environments.
• Requirements and test procedures for battery chargers used with electrically powered wheelchairs and scooters.
• Definition of a reference configuration for adjustable wheelchairs/scooters to allow comparable testing.
• Classification of electrically powered wheelchairs for EMC testing and required test apparatus and setup.
• Sequence of tests, test-report contents and criteria for pass/fail evaluation.
• Requirements for disclosure of relevant EMC information and user manual content related to electromagnetic compatibility.

Typical use and users

Used by manufacturers and designers of electrically powered wheelchairs and scooters (including add-on power kits), test and certification laboratories performing EMC conformity testing, conformity assessment bodies and regulators, procurement specialists specifying EMC performance for assistive devices, and clinical/rehabilitation professionals who need to understand device behavior in electromagnetic environments.

Related standards

Part of the ISO 7176 series of wheelchair standards. Commonly referenced related parts include ISO 7176-1 (static stability), ISO 7176-2 (dynamic stability for electric wheelchairs), ISO 7176-4 (energy consumption), ISO 7176-5 (dimensions, mass and manoeuvring space), ISO 7176-6 (maximum speed, acceleration and deceleration), ISO 7176-7 (measurement of seating and wheel dimensions), ISO 7176-8 (static, impact and fatigue strength tests), ISO 7176-9 (climatic tests), ISO 7176-15 (information disclosure and labelling) and ISO 7176-22 (set-up procedures). For batteries and chargers, ISO 7176-25 and other parts addressing battery technology are also relevant.

Keywords

electromagnetic compatibility, EMC, emissions, immunity, powered wheelchair, motorized scooter, battery charger, add-on power kit, test methods, reference configuration, ISO 7176.

FAQ

Q: What is this standard?

A: ISO 7176-21:2009 is an international standard that specified requirements and test methods for electromagnetic compatibility (emissions and immunity) of electrically powered wheelchairs and scooters and for their battery chargers.

Q: What does it cover?

A: It covered EMC limits, test apparatus and procedures, immunity and emissions tests, requirements for battery chargers, a reference configuration for adjustable devices, test reporting and user-manual disclosure related to EMC. It applied to single-occupant powered wheelchairs and scooters with maximum speed up to 15 km/h and to manual wheelchairs with add-on power kits.

Q: Who typically uses it?

A: Manufacturers, product designers, EMC test laboratories, conformity assessment bodies, regulators, procurement teams, and clinicians involved in device selection or risk assessment.

Q: Is it current or superseded?

A: ISO 7176-21:2009 is withdrawn and has been superseded by a newer edition: ISO 7176-21:2025 (published April 2025). The 2009 edition should be treated as superseded for current compliance work.

Q: Is it part of a series?

A: Yes. It is Part 21 of the ISO 7176 multi-part series of standards covering many aspects of wheelchair design, testing and information (stability, dimensions, strength, batteries/chargers, set-up procedures, etc.).

Q: What are the key keywords?

A: Electromagnetic compatibility, EMC, emissions, immunity, battery charger, powered wheelchair, scooter, test methods, reference configuration, add-on power kit.