Geological instrument low pressure test

The low-pressure test is one of the links that was easily overlooked in the type inspection of secondary equipment in traditional power systems in the past. There are usually two methods: low-temperature low-pressure and high-temperature low-pressure. At an altitude of 3000m (70kPa), low-temperature environments mainly occur, so the low-temperature low-pressure test is used to examine the adaptability of equipment to low-pressure environments.
The purpose of the low-pressure test of geological instruments is to determine their adaptability for use, transportation and storage and the integrity of their seals under normal temperature and low-pressure environmental conditions. Zhongke Testing Reliability Experiment Center has environmental testing capabilities for various geological instrument products, and provides professional low-pressure testing services for geological instrument products.

1. The temperature inside the test chamber during the test is the temperature under normal atmospheric conditions.
2. Place the product under test into the test box in its normal working position without packaging, and turn on the power supply of the product under test to make it in a ready-to-work state.
3. The pressure in the test chamber drops to the specified test pressure value and remains there for 2 hours.
4. Check whether the product under test is working normally.
5. Fill the test box with room temperature air so that the air pressure in the box is parallel to the atmospheric pressure in the test room.
6. Take the tested product out of the box and place it under normal atmospheric conditions for 1 hour.
7. According to the technical standards (technical conditions) of the tested products, the appearance of the products that have been tested under low pressure should be inspected. The tested products should not have blistering, wrinkling, peeling, deformation of non-metallic parts, damage to the sealing structural parts, air leakage, liquid leakage and other damages. The tested products should be tested for electrical and mechanical properties, and the test results should comply with the provisions of the product technical standards (technical conditions).

DZ 0039.1-1992 Basic environmental test conditions and methods for geological instrument products General principles
DZ 0039.10-1992 Basic environmental test conditions and methods for geological instrument products Low pressure test
GB/T 2423.102-2008 Environmental testing of electrical and electronic products Part 2: Test methods Test: Temperature (low temperature, high temperature)/low pressure/vibration (sinusoidal) comprehensive
GB/T 2424.15-2008 Environmental testing of electrical and electronic products Temperature/low pressure comprehensive test guidelines
GB/T2423.21-2008 Environmental testing of electrical and electronic products Part 2: Test method Test M: Low pressure
GB/T5170.10 Basic parameter verification method for environmental testing equipment for electrical and electronic products High and low temperature and low pressure testing equipment
GB/T 2423.59-2008 Environmental testing of electrical and electronic products Part 2: Test method Test Z/ABMFh: Temperature (low temperature, high temperature)/low pressure/vibration (random) comprehensive
GB/T2423.24-1995 Environmental test temperature (low temperature, high temperature) and low pressure vibration (sinusoidal) comprehensive test guidelines for electrical and electronic products
IEC68-2-41 Basic Environmental Test Regulations Part 2 Test Test Z/BM High Temperature/Low Pressure Test
GB/T 5170.17-2005 Environmental testing equipment for electrical and electronic products Basic parameter verification method Low temperature/low pressure/humid heat comprehensive sequential testing equipment