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PIPS II Owners Manual and Users Guide
Do not overfill; the starting level should be just below the bottom of the dewar
neck.
3.
The liquid nitrogen will boil off in a few minutes.
Continue refilling the dewar for about ten minutes to replenish the liquid
nitrogen.
NOTE:
It may take more than one “top off” to initially cool down the dewar.
4.
After about ten minutes the boil-off rate will have slowed
dramatically.
Top off the dewar.
5.
Place the supplied lid on the dewar.
6.
The system is ready for a sample to be installed
.
The liquid nitrogen in the dewar should last 6-8 hours if the heater is not being
used.
Loading a Sample
1.
Raise the stage into the airlock (if not already raised).
2.
Wait at least 20 minutes.
NOTE:
It is not necessary to wait if the stage has been in the raised position
for at least 20 minutes previously.
3.
Vent the airlock and remove the airlock cover.
4.
Insert sample (specimen post).
Be sure the specimen post is properly
seated in its lowest position.
5.
Replace the airlock cover.
6.
Lower the sample.
7.
Go to Settings > Heaters page.
Set the cold stage heater temperature to
23° and enable it.
8.
Find the center of rotation.
9.
Bring the sample to home position and note the position of the center
of rotation with respect to a known feature on the sample.
10.
Raise the stage and vent.
