User`s manual

Lake Shore MTD Series Cryotest System User’s Manual
Installation 3-5
P-MTD-3-4.bmp
Figure 3-4. MTD System Hookup to the Model 330 Temperature Controller
3.8 MISCELLANEOUS PRECAUTIONS
The following are miscellaneous precautions associated with MTD System operation.
• When necessary, the transfer line should be evacuated with a nitrogen-trapped diffusive-type
vacuum system.
• The transfer line should not be bent to less than a 12-inch (30 cm) radius.
• Heater power should not exceed 80 watts (first or second stage on cryostat).
• The DUT mount or any part of the MTD-150 should never be heated above 100 °C.
• Do not “break” vacuum in the chamber while the first or second stage is cold.
• Do not “break” transfer line vacuum with helium gas.
• Avoid contact with cold gas when depressurizing the storage dewar.
• Periodically, the o-ring seals that are routinely accessed and their mating surfaces on the
MTD-150 should be cleaned with a paper wipe and re-greased with Apiezon
®
"N" grease.