GB/T 12085.20-2022

Optics and photonics—Environmental test methods—Part 20: Humid atmosphere containing sulfur dioxide or hydrogen sulfide (English Version)

Standard No.

GB/T 12085.20-2022

Language

Chinese, Available in English version

Release Date

2022

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 12085.20-2022

Replace

GB/T 12085.20-2011

Scope

This document describes the environmental test method for optical and photonics wet air testing containing sulfur dioxide and hydrogen sulfide. This document applies to moist air tests containing sulfur dioxide and hydrogen sulfide for optical and photonic instruments and components from other fields such as mechanical, chemical and electronic equipment.

Introduction

Standard Evolution and Technological Breakthroughs

Technical Elements	2011 Edition	2022 New Edition
Applicable Objects	Traditional Optical Instruments	Optical and Photonic Instruments (including electronic components)
Test Gas Concentration	SO?25±5℃	SO?35±2℃+Humidity Stratified Control

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Analysis of Core Test Requirements

The test is divided into two categories: Method 41 (SO?) and Method 42 (H?S):

• Severity level refinement: The sulfur dioxide concentration is set to five levels of 15-30cm3/m3, which is closer to the actual military data
• State control: Safety test items are added to the working mode to verify the strong corrosion protection capability
of electronic components

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Implementation Guidance and Suggestions

For the actual application of shipborne optoelectronic equipment:

1. The spray tempering system in Appendix A is preferred to eliminate local condensation
2. RF devices should be subjected to continuous 48h survivability testing according to Method 42 Level 3

GB/T 12085.20-2022 Referenced Document

• GB/T 12085.1 Optics and photonics—Environmental test methods—Part1: Definitions, extent of testing
• ISO 9022-1:2016 Optics and photonics - Environmental test methods - Part 1: Definitions, extent of testing

GB/T 12085.20-2022 history

• 2022 GB/T 12085.20-2022 Optics and photonics—Environmental test methods—Part 20: Humid atmosphere containing sulfur dioxide or hydrogen sulfide
• 2011 GB/T 12085.20-2011 Optics and optical instruments.Enviromental test methods.Part 20:Humid atmosphere containing sulfur dioxide or hydrogen sulfide

GB/T 12085.20-2022 -All Parts