Connect the MAS pneumatic unit to the main gas supply ( see section 2.2);
Connect the RS232 port of the pneumatic unit to tty08 on the console.
For the connection of air hoses between the MAS control unit and the probe, refer to figure 3.1 and figure 3.2;
F or low-temperature experiments the bearing gas connection has to be removed and the outlet of a heat exchanger has to be connected instead. See figure 3.3 for low-temperature operation;
Please note: Kel-F caps for Zirconia rotors can be used in the temperature range from +10°C to +50°C. For a more extended VT range (-30 to +70°C) the usage of caps made of macor or boron nitride are mandatory!
Figure 3.2. Diagram for the pneumatic connections for operation at ambient temperature.
Figure 3.3. Set-up for low-temperature operation
The bearing gas (preferably dry N 2 gas) is cooled by an heat exchanger immersed in liquid N 2 , and is directly fed into the glass dewar inlet at the bottom of the probe.