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9
Operation
1. Remove the entire test cell from the heating well and place it in the
preparation stand.
2. Remove the cell and the cell cap from the coupling.
3. Place a small amount of high-temperature thread lubricant (#165-44) on
all
of the threads on the entire cell assembly. This includes the bottom
threads for the test cell, the top threads for the cell cap, the threads on the
three ports, the threads on the bob and bob shaft, and the threads on the
screws holding the torsion spring module to the cell coupling.
4. Place an o-ring (#130-77-4) into the o-ring groove inside the cell, just
above the rotor.
Carefully inspect all o-rings before use. Replace any that show signs
of damage or wear. O-rings are most likely to be damaged after tests
above 400°F (204°C).
5. Place the metal cell backup ring (#130-77-23) on top of the o-ring with the
flat surface facing up.
The backup ring is designed to prevent o-ring extrusion. Extrusion
could cause the seal to fail or complicate the opening of the cell
after a test. The backup ring is easily damaged and must be handled
carefully to avoid bending it.
6. If the rotor is not already in the cell, carefully lower it in with the magnet
end at the bottom.
The easiest way to hold the rotor is to insert two fingers inside and apply
pressure outward. Do not let it drop.
Test Cell on
Preparation Stand
O-ring Groove
