Utilizing mechanical refrigeration rather than liquid nitrogen (LN2) for rapid product temperature change rates, Thermotron's AST-20R is a logical choice for installations where liquid nitrogen infrastructure has not yet been established.
The AST-20R features a 24" x 24" (61cm x 61cm) multi-axis, repetitive shock vibration table capable of producing acceleration levels in excess of 50 grms. The patented vibration system provides consistent power spectral density energy over a broad range. Direct coupling of the product under test to the vibration table transmits maximum dynamic stress into the product.
Extreme thermal stresses are imparted to products through high temperature change rates in excess of 50°C per minute. With high volume, high velocity airflow that is configurable through slot and adjustable ducts, maximized thermal stress is directed onto the product, accelerating product failure rates.Using mechanical refrigeration instead of liquid nitrogen allows the AST-20R to achieve the rapid cooling rates required for HALT and HASS test profiles. However for applications requiring excess cooling capacity, a liquid nitrogen boost can be added as a supplement of the mechanical refrigeration system.