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3.4 About the tests
The tests were carried out by putting the camera and cables inside an oven and by logging temperature
values from different locations (Fig. 3.10). Also the ambient temperature inside the oven was measured.
Fig. 3.10. Temperature measurement points.
All tests were realized with 25 m long inlet and outlet cooling hoses (50 m total loop length) with inner
diameter of 6 mm. In the tests of Sections 3.5 and 3.6 the cables were insulated and the camera was not
insulated (see Figs. 3.2, 3.3 and 3.6-3.8) except in the recirculating chiller tests, which were done also with
the camera insulated (see Fig. 3.5). In the case of combined air and liquid cooling (Section 3.7) the
insulation consisted of one pyrojacket (no thermosleeves applied) and the interface between camera
housing and pyrojacket was not sealed (see Fig. 3.11) to let the air flow through the system. Cooling hose
twisting around cables (Fig. 3.2) and aluminium foil (Fig. 3.3) were applied also in this test.
Fig. 3.11. Insulation arrangement for combined air and liquid cooling.
Body top measurement point
Body bottom measurement point
Cables Temperature measurement point