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Page 9 of 25 SPEX SamplePrep LLC 9.24.07
SECTION 5.0: TOUCHSCREEN DISPLAYS
The 6870 Freezer/Mill is programmed and operated through a series of touchscreen displays.
Transition between screens, and all programming and operating commands, are done by touching
the screen with a stylus. Do not use a sharp point as this can damage or deface the screen.
5.1 LOGO SCREEN
When you switch on the power, the LOGO screen appears first. This says “SPEX SamplePrep
6870 Freezer/Mill” and includes a graphic representation of the Freezer/Mill mascot. Touch the
LOGO screen anywhere to transfer to the CURRENT SETTINGS screen.
5.2 CURRENT SETTINGS SCREEN
This screen displays whatever program is currently set up to run. Here is a typical program, as
displayed:
CYCLES
3
PRECOOL
10 MIN
RUN TIME
2 MIN
COOL TIME
2 MIN
RATE
10 CPS
SETTINGS
Start SCRN
CURRENT SETTINGS SCREEN
If the Freezer/Mill has a loaded vial in the coil, is filled with LN, and the lid is down and
latched, this is what happens when the mill is started with these settings:
1) Precool: the coil is inactive while the vial cools under LN for 10 minutes.
2) First cycle: the coil is activated and the impactor grinds for 2 minutes at a rate of 10
cycles per second (20 impacts per second).
3) Cool time: the coil is inactive for 2 minutes while it and the sample cool back down.
4) Second cycle: the coil is activated and the sample is ground for another 2 minutes.
5) Cool time: the coil is inactive for 2 minutes.