GB/T 12085.8-2022

Optics and photonics—Environmental test methods—Part 8:High internal pressure, low internal pressure, immersion (English Version)

Standard No.

GB/T 12085.8-2022

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 12085.8-2022

Replace

GB/T 12085.8-2010

Scope

This document describes high internal pressure, low internal pressure, immersion environmental test methods for optics and photonics. This document applies to high internal pressure, low internal pressure, immersion tests for optical and photonic instruments including ancillary components from other fields such as mechanical, chemical and electronic devices.

Introduction

Key points of standard technology evolution and implementation

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The new version of the standard inherits and develops the core test system of the GB/T12085 series, and for the first time formally includes optical and photonics instruments in the naming scope of the standard file. Compared with the 2010 version, the upgrade is mainly completed in three aspects:

Test parameter accuracy is improved:The immersion test temperature tolerance is tightened from ±3℃ to ±2℃

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Comparative analysis of key test parameters

Test type	Pressure difference (kPa)	Duration	Tolerance range
High internal pressure	50±0.2	30min	≤0.5kPa
Low internal pressure	100±0.5	40min	≤1.0kPa
Immersion	4m underwater	3h	±10% depth

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Implementation suggestions and case analysis

When conducting immersion tests on optical observation systems, special attention should be paid to:

1. Use a calibrated soft water circulation device (conductivity <5μS/cm)
2. Control the temperature change rate in stages: the initial 15min should not exceed 2K/min

After a telescope manufacturer improved the sealing test in accordance with this standard, the waterproof level of its military-grade products was increased from IP67 to IP69K.

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Key points for test risk prevention

Risk type	Preventive measures
Pressure mutation	Add 30 seconds buffer gradient transition
Specimen freezing	Environment constant temperature control ±0.5℃

GB/T 12085.8-2022 Referenced Document

• GB/T 12085.1 Optics and photonics—Environmental test methods—Part1: Definitions, extent of testing

GB/T 12085.8-2022 history

• 2022 GB/T 12085.8-2022 Optics and photonics—Environmental test methods—Part 8:High internal pressure, low internal pressure, immersion
• 2011 GB/T 12085.8-2010 Optics and optical instruments.Environmental test methods.Part 8:High pressure,low pressure,immersion
• 1989 GB/T 12085.8-1989 Optics and optical instruments--Environmental test methods--High pressure, low pressure, immersion

GB/T 12085.8-2022 -All Parts