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Page 14 of 25 SPEX SamplePrep LLC 9.24.07
As you touch the letter/number keys, what you have entered appears above the keyboard in a
mini-screen with a centered cursor.
The SHIFT key lets you shift back and forth from upper case to lower case.
Touching the SPACE key advances the cursor one space.
Touching the BACK key sends the cursor back one space.
The CLEAR key clears whatever you have entered on the mini-screen.
The ENTER key enters whatever appears in the mini-screen in the STORE/RECALL screen, as
the name of the program where you touched Sto.
The CANCEL key does not change anything on the screen, but returns you to the
STORE/RECALL screen.
To run the program you have just entered, touch RETURN to go back to the SETTINGS screen.
Review the settings, touch RETURN to go back to the CURRENT SETTINGS screen, touch
START/SCRN to go to the STATUS screen, and then touch RUN.
5.52 Recalling a program
In the STORE/RECALL screen, touch Rcl next to the preset program you want to recall. Touch
RETURN to see the settings for that program displayed in the SETTINGS screen.
To run the recalled program, touch RETURN to go to the CURRENT SETTINGS screen.
Touch START/SCRN to go to the STATUS screen, and then touch RUN.
SECTION 6.0: PRACTICAL OPERATION
6.1 Adding Liquid Nitrogen Coolant.
Liquid nitrogen is added to the 6870 Freezer/Mill with the lid open. There is a fill mark 1-3/4
inches (4.5 cm) below the lip of the tub. If the liquid nitrogen is above this mark when the lid is
closed, LN can splash outside the tub. Always close the lid slowly to avoid splashing.
Liquid nitrogen will most likely to be available either in a large tank with a flexible steel hose, or
in smaller Dewar flasks. The 6870 Freezer/Mill typically consumes 5 to 8 liters of LN during
initial cool-down, and another 2 to 5 liters per hour, depending on use.
Unlatch the lid and the gas cylinders will push it open. To unlock the latch, press down on the
lid and pull the top of the latch toward you and down. Disengage the bottom of the latch and the
lid can be opened. The coil mechanism is attached to the lid and will rise with it. The coil gate
is on the right side of the coil housing. To lower the coil gate to insert a loaded vial or vials for
grinding, align the coil gate handle with the slot in the coil gate, and pull the coil gate to the
right.