Photostability Chember Qualification

Environmental chamber

Environmental test chambers feature precise control of appropriate parameters to create repeatable environmental conditions. Test chambers are suitable for numerous applications: product shelf life, stability and package testing, light exposure and temperature evaluation studies, electronic component burn-in, plant growth and many more.

Environmental testing chambers come in various designs and sizes, ranging from a few liters (chamber) up to several thousand cubic meters (room) and feature a wide temperature and relative humidity (RH) range. Most modern test chambers offers microprocessor based controllers with computer communications, autotune, solid state RH sensor and stainless steel temperature probes. LED displays show both process and set point values.

Tests are performed according to the HALT or HASS testing principles:

• HALT - Highly Accelerated Life Test
• HASS - Highly Accelerated Stress ScreenHALT and HASS, also known as Accelerated Stress Testing (AST), subject a product to a series of overstresses, effectively forcing product weak links to emerge by accelerating fatigue. In other words tests are unique. Accelerated product reliability test methods focus on finding defects in products so they can be fixed before becoming expensive field issues. Stresses are applied in a controlled, incremental fashion while the unit under test is continuously monitored for failures. Once the weaknesses of the product are detected the limits of the product are clearly defined.