ISO 6797:1982

Overview

ISO 6797:1982 is an international standard that establishes production conformity requirements for flasher units used in road motor vehicles, excluding motorcycles. Developed by ISO Technical Committee ISO/TC 22, this standard defines acceptable quality levels for various characteristics of flasher units tested via random sampling. While ISO 6797 does not specify sampling frequency or batch sizes, it applies exclusively to flasher types that comply with ISO 4082, ensuring consistency and safety in automotive signaling devices.

Key Topics

• Scope and Application

  • Applies to flasher units for power-driven vehicles except motorcycles
  • Focuses on quality level criteria for production conformity tests
  • Does not prescribe sampling frequency or batch size
  • Complements ISO 4082, which governs flasher unit testing and approval

• Testing Procedures

  • Includes tests on starting time, flash rate, current “On” time, voltage drop, and transient overvoltage strength
  • Requires adherence to test conditions and circuitry defined in ISO 4082
  • Specifies sample sizes for each type of test to ensure statistical validity
  • Covers environmental challenges such as heat, cold, vibration, and impact resistance
  • Introduces endurance testing with weighted defect evaluation to assess long-term reliability

• Operational Requirements

  • Ensures proper functioning of directional indicators and hazard warning signals
  • Defines acceptable voltage drops and frequency variations within tested samples
  • Specifies criteria for the operational tell-tale (signal indicator) on dashboards
  • Includes dielectric strength and overload strength tests to verify electrical safety

• Quality Acceptance Criteria

  • Sets acceptable quality limits (AQL) for defects in production lots
  • Applies statistical methods from ISO 3534 for assessing conformity
  • Provides tables categorizing defect severity to determine acceptance or rejection
  • Covers conditions for frequency increases/decreases and cessation of function

Applications

• Automotive Manufacturing Quality Control
  ISO 6797 serves manufacturers in verifying production quality of flasher units before vehicle assembly, helping prevent faulty signaling components from entering the market.

• Component Supplier Compliance
  Suppliers of flasher units can use this standard to certify their products meet international quality benchmarks, facilitating smoother integration with vehicle manufacturers’ specifications.

• Regulatory and Safety Testing
  Governmental and non-governmental organizations can adopt these criteria to establish safety regulations related to vehicle signal lighting systems, enhancing road safety.

• Product Development and Validation
  Engineering teams can reference ISO 6797 alongside ISO 4082 during product design cycles to ensure their flasher units fulfill operational and durability standards before mass production.

Related Standards

• ISO 4082: Road Vehicles - Flasher Units
  Defines testing methods, technical specifications, and performance requirements for flasher units which ISO 6797 builds upon for production conformity.

• ISO 3534: Statistics - Vocabulary and Symbols
  Provides the statistical terminology and foundation for quality control sampling and defect analysis as applied in ISO 6797 testing.

• ISO 4682: Road Vehicles - Environmental Testing
  Specifies environmental test methods relevant to assessing vibration, impact, endurance, and thermal conditions of automotive components, supporting durability evaluations under ISO 6797.

Summary

ISO 6797:1982 is an essential quality standard for automotive flasher units, ensuring reliable and safe signaling performance through rigorous testing and production conformity requirements. By integrating this standard with ISO 4082 and related environmental and statistical standards, vehicle manufacturers and suppliers can uphold high-quality control levels and contribute to enhanced road vehicle safety worldwide.