A rain test chamber is utilized to perform rain tests on products. During rainfall, due to the penetration, flow, impact, and accumulation of precipitation, machinery, equipment, and their materials can be adversely affected in various ways.

Dust testing, codified in GB/T 2423.37 and IEC 60068-2-68, is now mandatory for proving the sealing integrity and reliability of military, automotive, photovoltaic and rail-transit products. Direct test outlays—consumables, energy, labour and depreciation—seldom exceed one to three per cent of the selling price, yet hidden expenses triggered by poor chamber selection—repeat tests, invalid data or after-sales downtime—can leap to eight to twelve per cent.

A low-temperature test chamber can accommodate multiple test specimens, but are there specific requirements regarding the location and quantity of test points? Today, we will introduce the guidelines for test point placement and quantity in such equipment.