Programmable walk-in environmental stability test chamber

Programmable walk-in environmental stability test chamber
 
Walk-in application
 
A KOMEG Walk-In Chamber serves as a test site for large components, assemblies, and finished products. KOMEG manufactures both Panel Walk-In Chambers and Solid Walk-In Chambers and can be configured as a temperature chamber or a temperature humidity chamber.
 
Standard Met and Implemented:
 
GB/Bb T2423.2-89 high temperature test method
GB2423.1-89 test A: low temperature test method 6
GJB150.4-1986 test at low temperature
IEC60068-2-1 low temperature test method
IEC60068-2-38 temperature cycle
IEC60068-2-78 constant humidity temperature
 
1. Advantages:
Structure:
Our housing are high-quality carbon steel with static color spray outside and galvanized steel sheet inside. Sheet metal processing machines are TRUMPF from Germany. Trumph is famous for its precise bending technology, so our products outlook looks quality, precise and neat.
 
Refrigerating System:
We use tube bending machine for copper tube bending, this way can decrease the welding points. This is easy to keep the copper tube clean to ensure longer service life of the compressor. Also less welding points can reduce the resistance when the liquid flowing inside, to keep compressor working in higher efficiency, and better energy-saving.
 
Water and electricity system separating design:
For improving the comparable fragile part, heating part of constant high damp heat test, we apply water and electricity system separating design, to keep the water and electricity system separated with external humidifying system, and use top brand(e.g.: DANFOSS, Schneider, Danfoss, Emerson, Saginomiya, etc. ) for all electronic components to make sure the chambers’ quality and service time.
 
3.  High temperature limits of test chambers
 
There are many types of test chambers, but they all high and low temperature limits. Let's take a look at the typical high temperatures thresholds and why they exist.
 
Test chambers usually have wire heaters made of a material called Nichrome. By placing successive loops of heater wire, a greater amount of heat that is generated. The result looks a lot like the inside of a toaster. Fans circulate the air past the heaters, so the samples in the chamber are not exposed to radiant heat. It is very easy to add heaters and increase the speed and / or high limit of a chamber.
KOMEG chambers typically have a high temperature limits under 200°C. Here is a break-down of why a chamber's high temperature limit exists:
 
150°C: There are two reasons we may limit a chamber to 150°C. First, there may be a limitation of the materials used inside the chamber. Secondly, for extremely fast chambers, we may limit the high temperature to avoid problems with accidentally tripping overheat protection devices.
 
170-180°C: Most models stop at this temperature range. There is a risk of burning the oil inside the refrigeration's cooling coil.