ISO 9022-2:2015

Overview

ISO 9022-2:2015 - "Optics and photonics - Environmental test methods - Part 2: Cold, heat and humidity" defines laboratory methods to assess how optical instruments (and instruments containing optical components plus additional assemblies from other fields) resist temperature and humidity influences. The standard’s purpose is to determine the extent to which optical, climatic, mechanical, chemical and electrical (including electrostatic) performance characteristics are affected by cold, heat, damp heat and condensation.

Keywords: ISO 9022-2, environmental test methods, optics and photonics, cold heat humidity testing, damp heat, condensation testing, conditioning methods.

Key topics and requirements

• Scope and intent: Tests simulate realistic and accelerated environmental conditions (arctic to tropical) to verify instrument robustness and lifetime performance.
• Conditioning methods: The standard specifies named conditioning methods including:
  • Method 10 - Cold (examples: temperatures from around 0 °C down to −65 °C are listed across severity degrees)
  • Method 11 - Dry heat (temperatures up to 85 °C; relative humidity <40 %)
  • Method 12 - Damp heat (e.g., 40 °C/90–95 % r.h. and 55 °C/90–95 % r.h.)
  • Method 13 - Condensation (≈100 % r.h. including bedewing of specimens)
  • Method 14 - Slow temperature change (cycling with defined t1/t2, temperature change rates and dwell times)
  • Method 15 - Cycling exposure (referenced for combined cycles)
• Severity levels and parameters: Each method has degrees of severity with defined test-chamber temperatures, exposure times (hours to days), and dwell times. Examples from the standard include exposure times from hours to multiple days and temperature-change rates between 0.2 K/min and 2 K/min for slow-change cycles.
• Test conditions and acceptance:
  • Specimens must reach within 3 K of chamber temperature before exposure time starts.
  • Requirements address specimen arrangement, moisture drip prevention, heat-dissipating specimens (sensor placement), and warnings for high dew-point exposures.
  • Tests specify a state of operation (noted as 0, 1, or 2) to define whether devices are unpowered, powered, or operating (to be specified in the relevant test specification).

Applications and users

ISO 9022-2 is used by:

• Optical instrument manufacturers and designers - for design verification and qualification.
• Environmental test laboratories - to execute repeatable cold/heat/humidity tests.
• Quality assurance, reliability and R&D teams - to validate product performance under climatic stress.
• Procurement and certification bodies - to define environmental acceptance criteria in contracts and specifications.

Typical applications include lab validation, production screening, reliability assessment, and comparative evaluation of optical systems across environmental conditions.

Related standards

• ISO 9022-1: Definitions and extent of testing (part of the same series)
• Other parts of ISO 9022 (Mechanical stress, Salt mist, Dust, Condensation, etc.) for combined and complementary environmental tests.

For implementation, consult the complete (clean) ISO 9022-2:2015 document and related parts of the ISO 9022 series for full procedural details and normative references.