SAIC

In the workshops of some enterprises, we often see a brand-new constant temperature and humidity test chamber that, after a short period of use, becomes covered in oil stains and dust.

Following our previous discussion on the effects of high-temperature environmental testing, this paper systematically summarizes the typical property changes that occur in test specimens within low-temperature test chambers (hereinafter referred to as “the equipment”).

In many production workshops of enterprises, constant temperature and humidity test chambers are often indispensable pieces of equipment. However, many operators tend to overlook the daily cleaning of these devices during use, leading to a rapid accumulation of grease and dust on the equipment.

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.

The constant temperature and humidity test chamber serv […]