Operation; Standard Auto Fill - SPEX SamplePrep 6875D Operating Manual

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

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
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.
1300-87052-1A, REV 1
Figure 14 – Clear Protocol
button to initiate the protocol.
button. The Auto Fill valve will open and let liquid nitrogen into the
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6875D Freezer/Mill
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