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Telecordia GR-63-CORE for network switching systems (NEBS)

For rack-component-level testing, your best bet is our quality temperature/humidity chambers ;Faster Temperature Cycling Chambersmodels. For fully loaded racks, a walk-in chamber is needed.

Paragraph	Title	Description	Benchtop Models	Reach-in Models	Other Models
5.1.1.1	Low-Temperature Exposure and Thermal Shock	Hold the equipment at -40°C for 72 hours, then remove to ambient room temperature	Almost every benchtop	Any quality temperature/humidity chambers	Walk-in
5.1.1.2	High-Temperature Exposure and Thermal Shock	Hold the equipment at 70°C for 72 hours, then remove to ambient room temperature	Any benchtop or ovens	Any quality temperature/humidity chambers or Faster Temperature Cycling Chambers	Walk-in
5.1.1.3	High Relative Humidity Exposure	Maintain 40°C and 90-95% RH for 96 hours, with controlled heat-up and cool-down	Any humidity model	Any quality temperature/humidity chambers	Walk-in
5.1.2	Operating Temperature and Relative Humidity	There are 14 steps to the test sequence, cycling from -5 to 50°C, as well as humidity. One step requires holding 5°C/<15%RH.		Any quality temperature/humidity chambers	Walk-in
5.1.3	Operating Altitude	Twelve step cycling test of temperature and humidity. 25°C to 50°C and up to 4,000 meters above sea level.		Altitude or Walk-in	Walk-in

Because 5.1.2 and 5.1.3 require your equipment to be operating, these become a challenging application for a test chamber due to the heat generated.

The altitude test is new for Issue 2 of this specification.

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