Environmental Test chambers feature precise control of appropriate parameters to create repeatable environmental conditions. Test chambers are suitable for numerous applications, including 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 comes in various designs and size, ranging from a few liters (chamber) up to several thousand cubic meters (room) and feature a wide temperature range and relative humidity (RH) ranges. Most modern test chambers offers microprocessorbased 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 Screen
HALT 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 test are unique, accelerated product reliability test methods focused 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.
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