Circular Test Dewar System (TD-c Model) - Description
Callisto is pleased to announce the completion of the design of a new cryogenic test Dewar system for testing of various types of small components including RF, optical, and electronics. This system is cryogen-free (closed-loop helium gas circuit), operates under vacuum and uses a GM-type cryo-cooler. It can cool components as low as 25K.
One of the main features of this system is the capability of automatic thermal cycling between +60°C down to below 40K and back to +60°C within a very short time frame, typically less than 1.5 hrs (depending on test setup).
This system includes 5 large ports located on the sides and on the top of the enclosure that can be used for a variety of hermetic connections to reach the components under test. Two additional small ports are available on the bottom plate, which can also be used for a variety of electrical connections.
The system also features a special cryo-cooler mount, to allow an easy opening and disassembly of the cold chamber containing the components tested (e.g. to transfer the test chamber in a white room to load a batch of components).
The Dewar mechanical design is very flexible. For instance it is possible to either open the lid of the Dewar or the entire Dewar housing to access the components, according to the exact requirements of the test setup.
Purchase options of either a complete Cryo Test System or Cryo Test Service are detailed on the next page.
|Base Operation Temperature||25 Kelvin unloaded|
|Dewar Dimensions||H. 700mm x Ø 450mm|
|Inner dimensions of cold box||H. 140mm x L. 160mm x W. 160mm|
|Test Enclosure Environment||Vacuum 10-5 mbar|
|Cooling Power||140 Watts (@50K)|
|Minimum Test Duration||+60°C to 40K to +60°C in typically <1.5hrs|
|Mean Time Between Services||10,000 hrs|
|Test Ports||5 ports Ø 80mm, 1 port Ø 30mm|
|Thermometry||4 diode thermometers|
|External logging||Software for M&C and thermal cycle management running on MSwin XP or 7|
|Cold Plate Material||Aluminium|
|Accessories||Support trolley and rack unit|