SIST EN 2240-043:2010

Overview

SIST EN 2240-043:2010 is a European standard developed by CEN that specifies the product requirements for incandescent lamps, specifically lamp code 685, intended for aerospace applications. This standard is part of the broader EN 2240 aerospace series focusing on incandescent lamps and must be used in conjunction with EN 2756, which covers relevant test methods. SIST EN 2240-043:2010 ensures that lamps used in the aerospace industry meet stringent quality, performance, and safety criteria necessary for reliable operation in demanding environments.

Key Topics

• Lamp Specifications
  Defines essential characteristics for lamp code 685, including electrical, physical, and optical properties to maintain quality and consistency. This covers:

  • Nominal voltage and current
  • Nominal power and luminous flux
  • Colour temperature and filament type
  • Dimensions such as Light Centre Length (LCL) and mass

• Design and Marking
  Standardizes lamp designation and marking to ensure clear identification. Markings include the lamp’s international code number consistent with EN 2240-002. Proper labeling facilitates traceability and compliance during manufacturing and maintenance.

• Compatibility Requirements
  Requires the lamp to conform to specific cap dimensions (SX4s/4 per EN 2241) and incorporate filament designs (following EN 2240-002) to ensure interoperability across aerospace equipment.

• Testing and Quality Assurance
  Mandates use alongside EN 2756 for test methods to validate lamp performance, reliability, and safety under aerospace conditions.

Applications

This standard is crucial for manufacturers, designers, and quality assurance teams involved in producing and maintaining aerospace lighting systems. Specific uses include:

• Aircraft Lighting Systems
  Ensures lamps meet the rigorous performance needed for cockpit indicators, cabin lighting, and external illumination.

• Defense and Spacecraft Equipment
  Applicable to military aerospace vehicles and spacecraft where durability and reliable light output are critical under extreme conditions.

• Aerospace Equipment Maintenance
  Provides maintenance teams with standardized criteria for lamp replacement, ensuring components used meet approved specifications for safety and functionality.

Related Standards

• EN 2756 - Test Methods for Aerospace Lamps
  Essential companion document specifying the procedures to verify compliance with performance requirements during manufacturing and inspection.

• EN 2240-001 - Technical Specification for Aerospace Incandescent Lamps
  Specifies overarching technical requirements covering different lamp types, ensuring a consistent framework for aerospace lamp production.

• EN 2240-002 - Main Characteristics of Aerospace Lamps
  Defines classification and coding systems used for marking and identifying aerospace incandescent lamps, including filament form and electrical characteristics.

• EN 2241 - Aerospace Lamp Caps Dimensions
  Details the physical dimensions and compatibility requirements for various lamp caps, including SX4s/4 used by lamp code 685.

Practical Value

Adopting SIST EN 2240-043:2010 enables aerospace industry stakeholders to:

• Ensure compliance with harmonized European and international aerospace lighting standards
• Enhance safety by using lamps verified for consistent electrical and luminous characteristics
• Reduce maintenance complexity through standardized lamp coding and marking
• Achieve interoperability within aerospace equipment supplied by diverse manufacturers
• Support traceability and quality control across the aerospace supply chain

By adhering to EN 2240-043, aerospace manufacturers and operators can maintain high reliability and safety standards vital for mission-critical aerospace lighting systems.