ATLAS TRACKER PIXEL AND SCT - COOLING OF THE ELECTRONICS
Phase II - Extensive Tests with Haug Compressor 4 cylinders
Schematic of the Test Circuit

Valves 3 and 4 are pneumatic actuated and controlled by the PLC.

Valve 2 is a manual needle valve used as an expansion valve.

The heater is 6kW controlled by a PID temperature controller.

The flowmeter is a gas rotameter.