Comprehensive low voltage and temperature test of optical instruments

The purpose of the comprehensive low-pressure and temperature test of optical and photonics instruments is to study the degree of change in the optical, thermal, chemical and electrical properties of the sample when affected by low pressure, atmospheric temperature and high temperature.
Zhongke Testing Reliability Experiment Center has environmental testing capabilities for various optical and photonics instruments, and provides professional environmental testing services such as low-voltage and temperature comprehensive testing for optical and photonics instrument products.

Optical instruments, instruments equipped with optical components and optical components.

The test conditions adopt a low-pressure box (room) with air circulation. The low pressure box itself can be used as a warming box, or it can be installed in a warming box. The size of the test box (room) and the layout of the selected samples should be able to ensure that all samples are at a uniform temperature.
If preheating is required, heating should be started before reducing pressure to reach the test chamber (room) temperature. The test air pressure setting should rather reach the test chamber temperature first than at the latest. When increasing the pressure, no condensation is allowed on the sample. This can be accomplished by ventilating the chamber with high-purity nitrogen or dry air.
Temperature changes should be carried out slowly to avoid damage to the specimen. When changing the air pressure in the box, sudden changes in air pressure should be avoided, because this is also inconsistent with natural conditions. When all parts of the sample are adjusted so that the temperature difference in the test chamber (room) is within 3K and reaches the specified air pressure value, the test condition cycle begins.
The heated sample should be placed at the test temperature until the temperature of the test box (chamber) stabilizes and the temperature change of the sample does not exceed 1K/h, and then the pressure reduction begins. During the pressure reduction process, the sample is allowed to heat itself until the test pressure reaches the specified value, and the test condition cycle begins. After the entire test condition is completed, the pressure begins to increase and the test box (room) begins to cool down.
The temperature inside the test chamber and on the specimen should be measured. The location of the temperature measurement on the specimen shall be specified in the relevant standards.
Including: comprehensive test of low pressure and atmospheric temperature, comprehensive test of low pressure and high temperature

GB/T 12085.1-2022 Optics and photonics Environmental test methods Part 1: Terminology, test scope
ISO 9022-21: 2015 Optics and Photonics Environmental Test Methods Part 21: Comprehensive Test of Low Pressure, Atmospheric Temperature, and High Temperature
GB/T 12085.21-2011 Optics and optical instruments Environmental test methods Part 21: Comprehensive test of low pressure, atmospheric temperature and high temperature
DIN ISO 9022-21: 2015 Optics and Photonics Environmental Test Methods Part 21: Low Pressure and Atmospheric Temperature and High Temperature Comprehensive Test
BS ISO 9022-21: 2015 Optics and Photonics Environmental Test Methods Part 21: Low Pressure, Atmospheric Temperature, and High Temperature Comprehensive Test
KS B ISO 9022-21: 2015 Optics and Photonics Environmental Test Methods Part 21: Comprehensive Test of Low Pressure, Atmospheric Temperature, and High Temperature
GB/T 12085.2-2022 Optics and photonics Environmental test methods Part 2: Low temperature, high temperature, and damp heat