Lake Shore Cryotronics CRX-6.5K, Руководство пользователя

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60 CHAPTER 3: Installation and Setup
Model CRX-6.5K Probe Station
3.6.2.1 Flexible Helium Line Connection
Follow these procedures to connect the flexible helium lines to the cold head and to
the compressor unit:
1. Remove the protective caps from the supply and return ports of both the
compressor and the cold head.
2. Remove the protective caps from both ends of both helium lines.
3. Check that the flat rubber gaskets are clean and in place on each supply/return
connection on the compressor and cold head (FIGURE 3-12).
When making each connection of the flexible helium lines in steps 4 through 7, follow
the steps below to ensure that the gas seal is not compromised, allowing the helium
gas to escape.
a. Using your fingers, start the threading of the self-sealing nut.
b. Using the two wrenches provided in the CCR tool set, tighten the self-sealing
nut. Hold the nut with one wrench and turn with the other as shown in
FIGURE 3-12. Do not over tighten; the maximum allowable torque is 50 Nm.
4. Connect the return line to the compressor unit.
5. Connect the supply line to the compressor unit (FIGURE 3-13, left).
6. Connect the return line to the cold head (FIGURE 3-13).
7. Connect the supply line to the cold head.
.
FIGURE 3-12 Left: Gasket on the cold head supply line;
Right: Placement of wrenches on the self-sealing nut
hold
turn
FIGURE 3-13 Left: On the compressor, connect the return line first, and then connect the supply line;
Right: On the cold head, connect the return line first (shown) and then connect the supply line