6875D Freezer/Mill
1300-87052-1A, REV 1
SPEX SamplePrep LLC
Page 20 of 36
5.4 Saved Protocols
(Cont’d)
5.4.3 Edit Saved Protocols
To edit a saved protocol, touch the protocol to highlight the name
(BLUE)
. Then touch the EDIT
button. From the Edit Protocol screen change parameters and/or name, then touch the DONE
button.
5.4.4 Recalling a program
In the
SAVED PROTOCOLS
screen, touch the protocol to highlight the name
(BLUE)
. Then touch
the LOAD button to send protocol to the
CONTROL PANEL
screen. Review the parameters. To
RUN the protocol touch the button to initiate the protocol.
6.0 OPERATION
CAUTION: Be sure that the vent on the back of the 6875D Freezer/Mill (Figure 2) is not
blocked in any way. During operation, liquid nitrogen vaporizes in the Freezer/Mill
and pressure is relieved through this vent.
6.1 Standard Auto Fill
When the 6875D Freezer/Mill is set up for the first run of the day, with a loaded vial(s) in the
grinding Chamber(s), make sure the unit is connected to a LN Tank or LN line and the LN valve is
open. Choose Mono or Dual sample mode and Auto Fill, then go to the
CONTROL PANEL
screen
and touch the button
.
The Auto Fill valve will open and let liquid nitrogen into the
tub. It is normal for the valve to close and open several times before the tub is full and the
Precool timing starts. Liquid nitrogen boils and splashes as it enters the tub and this splashing
may temporary interfere with the upper LN sensor. The Auto Fill System has a built-in pause for
the liquid nitrogen to stabilize before measuring the LN level again. The Precool countdown will
not begin until the tub is full of liquid nitrogen to the proper operating level.
Figure 14
–
Clear Protocol
