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