User`s manual

Lake Shore MTD Series Cryotest System User’s Manual
G-2 Filter Wheel Assemblies
G3.0 ASSEMBLY INSTALLATION
The MTD-150 System should be stabilized at room temperature and the transfer line removed.
The system should be stood upright on its ring stand.
1. Open the vacuum pumpout valve to vent system.
2. Release the 4 pull-down clamps and remove the vacuum chamber end closure.
NOTE: Place vacuum chamber end closure so that the o-ring is face up to prevent damage.
3. Remove radiation shield by unscrewing the six captive socket head screws.
4. Align the drive shaft with the drive gear through opening and lower the module onto the spool
mount.
5. Tighten the three captive socket head screws.
CAUTION: Do not grease the drive mechanism or the moveable module components.
NOTE: Be sure to use a light film of Apiezon “N” grease at the interface.
6. Align the module wheel position number one with the indicator reading 1.00 located on the vacuum
chamber base plate.
7. Torque down the drive shaft collett lock by placing an open end wrench on the base and then
tightening the hex nut.
NOTE: Do not rotate the drive gear when fastening the nut.
8. Check the operation of the module be rotating the drive knob located on the position indicator.
Rotate the mechanism from position one to position two and so forth. It should rotate freely with
minimal torque required.
NOTE: The module wheel has an over travel stop and can not be rotated a full 360°.
G4.0 ASSEMBLY REMOVAL
The following procedure is for filter wheel assembly removal.
1. To remove the module, loosen the hex nut on the drive shaft collett lock.
2. Loosen the three captive socket head screws.
3. Lift the module off of the spool mount.
NOTE: The same procedure is used to remove a second filter wheel assembly, if installed.
4. Replace the radiation shield.
5. Clamp down the vacuum chamber end closure.
G5.0 FILTER AND APERTURE INSTALLATION AND REMOVAL
The MTD-150 System should be stabilized at room temperature and the transfer line removed.
The system should be stood upright on its ring stand.
1. Perform steps 1-3 from Paragraph G3.0 – Assembly Installation.
2. Remove the module cover plate by removing the six flat head screws.
3. Remove the wheel cover by removing the twelve flat head screws.
4. Place a ring of indium foil into the bottom of each recess.
5. Place the filters or apertures into the recesses.
6. Place the black aluminum washers provided into each recess.
7. Place the wavy spring washers provided into each recess.
8. Replace the wheel cover and screw down flat with the twelve flat head screws.
9. Replace the module cover plate and screw down tight with the six flat head screws.
CAUTION: It is very important that the moving parts are not contaminated. To prevent freeze-up
problems, clean the wheel surfaces with alcohol and blow dry before final assembly.
NOTE: Take care that the spring loaded seals do not fall out during the assembly procedure.
10. Replace the radiation shield.
11. Clamp down the vacuum chamber end closure.