5.0
OPERATION
5.06
Off/On switch, and factory settings
If you have not done so, switch on electrical power to the mill by pressing the rocker switch in
the rear of cabinet. Numbers representing the factory settings should appear in the control
display.
Visible on the LED display:
Cycles: 3 (number of successive grinding periods)
Time 1: 2.0 (minutes per grinding period)
Rate: 10 (impact frequency in cycles per second)
Accessible through keypad by pressing indicated keys:
T2: 2.0 (minutes per cooling period between T1 grinding periods)
T3: 15.0 (minutes of cooling before grinding starts)
Adjust the settings as desired before operating the mill.
5.07
Running the 6750 Freezer/Mill
Assuming there is liquid nitrogen in the tub and a loaded vial in the coil, and the factory control
settings are retained, the Freezer/Mill should perform the following steps when the RUN button
is pushed:
a) The mill cools for 15 min., while the TIME display counts down the time remaining in
the pre-cooling period. The T3 indicator light should be on.
b) The first grinding period begins and lasts for 2 minutes, while the TIME display counts
down the time remaining in that grinding period, and the RUN indicator light is lit.
The CYCLE display indicates 3.
c) The first cooling period begins and lasts for 2 minutes, while the TIME display counts
down and the T2 indicator light is on. The CYCLE display still indicates 3.
d) The second grinding/cooling cycle takes place, the same as in steps b and c combined.
The TIME display will count down, and the appropriate RUN and T2 indicator lights
will be on in turn, while the CYCLE display reads 2.
e) The third grinding/cooling cycle is like the second (i.e. Step d) except that the CYCLES
display reads 1.
f) At the end of the third cycle, the mill will emit four beeps and the TIME display will
flash “END” for several seconds. Then the control panel will return to Program Mode,
exhibiting the same parameters as when the Freezer/Mill was switched on.
During one of the grinding periods you should experiment with the impact frequency by pressing
the INCREASE (↑) and/or DECREASE (↓) keys to speed up or slow down the speed of
grinding.
While the mill is grinding, try the Pause function by pressing the MAN key. The mill should
stop and PAUSE appear in the display. Press the MAN key to resume grinding.
5.0
OPERATION
5.08
Removing, Emptying, and Cleaning the Grinding Vial
At the conclusion of the grinding cycle, unlatch the lid and lift it. Do not force the lid, but bring
it up at its own speed. Open the coil gate by pulling the coil gate handle to the right.
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