ISO 8056-2:1988/Amd 1:2016

Overview

ISO 8056-2:1988/Amd 1:2016 is an international standard issued by the International Organization for Standardization (ISO). It addresses the general requirements and testing procedures for terminations of nickel-chromium and nickel-aluminium thermocouple extension cables used specifically in the aerospace industry. This amendment updates the original 1988 specification, refining test conditions and terminology to ensure consistent, reliable performance of thermocouple cable terminations in aircraft systems.

Key Topics

• Scope: Focuses on terminations for nickel-chromium (Ni-Cr) and nickel-aluminium (Ni-Al) thermocouple extension cables, which are essential components in temperature measurement and control systems within aircraft.
• Testing Conditions: Specifies environmental parameters for all tests as being performed at 20 °C ± 5 °C temperature and a maximum air pressure of 1060 hPa, ensuring reproducibility and accuracy.
• Mechanical Requirements: Updates minimum pull-off load values for Ni-Al terminations, reflecting more precise mechanical durability standards.
• Quality Assurance: Establishes standardized testing methods to verify mechanical and electrical integrity of cable terminations, critical for safety and operational reliability in aerospace applications.
• Amendment Details: Clarifies terminology and test conditions to align with current aerospace electrical requirements defined by ISO/TC 20 and Aerospace Subcommittee SC 1.

Applications

This standard applies primarily to the aerospace sector, where precise temperature monitoring is vital for engine performance, safety monitoring, and environmental control in aircraft systems. Benefits of compliance include:

• Enhanced Safety: Reliable thermocouple termination prevents false temperature readings that could lead to hazardous conditions.
• Equipment Longevity: Ensuring durability of cable connections reduces maintenance frequency and downtime.
• Regulatory Compliance: Adhering to ISO 8056-2 supports meeting international aerospace regulatory requirements and quality assurance protocols.
• Compatibility: Standardized terminations facilitate interoperability and replacement across different aerospace manufacturers and maintenance providers.
• Quality Control: Ensures consistent manufacturing and testing practices for thermocouple extension cables used in critical aircraft operations.

Related Standards

• ISO 8056-1: Covers specifications for the cables themselves - nickel-chromium and nickel-aluminium thermocouple extension cables.
• ISO/IEC Directives, Part 1 and Part 2: Provide guidance on drafting and maintaining ISO standards and amendments.
• ISO/TC 20 Technical Committee: Oversees aerospace vehicle standards, including electrical and environmental testing relevant to this standard.
• International Electrotechnical Commission (IEC) Standards: Often referenced in coordination with ISO for electrotechnical components in aerospace.
• Temperature Measurement Standards in Aerospace: Various ISO and IEC standards addressing the performance and calibration of thermocouples and sensors.

By adopting ISO 8056-2:1988/Amd 1:2016, aerospace manufacturers and suppliers can ensure the highest level of performance, safety, and reliability for thermocouple extension cable terminations, supporting advanced temperature monitoring systems crucial in modern aircraft technology.