6875D Freezer/Mill
1300-87052-1A, REV 1
SPEX SamplePrep LLC
Page 14 of 36
5.2 CONTROL PANEL
(Cont’d)
In the
CONTROL PANEL
, Mono or Dual sample mode can be selected as well as to Auto Fill or to
Manual Fill the 6875D Freezer/Mill with liquid nitrogen. The STATUS BAR (top of screen) counts
down the time remaining for a run. Before a run starts, the STATUS BAR will display STANDBY,
as shown in Figure 6.
To change the settings of a selected field, press the arrow buttons on the
CONTROL PANEL
screen. The left arrow buttons decrease the number displayed and the right arrow buttons
increase the number displayed.
5.2.1 Starting a Programmed Run
When the Mono mode is selected the button is displayed as a blue button indicating Mono or
the first grinding chamber is be active. To change from Mono mode to Dual mode, touch the
Dual mode button and the button will turn blue indicating Dual or both grinding chambers is
active. Only the Button that is blue (Mono or Dual) will execute the programmed settings
(Figure 6), when button is touched. The button is displayed as a gray button (Mono
or Dual) indicating it is inactive. The Freezer/Mill can be started, stopped, or paused in the
middle of a grinding program from the button selections to the right of the screen.
The Auto Fill or Manual Fill buttons are also displayed on Control Panel. When a button is
selected the button displayed as blue, indicating it is active. In Figure 6, Auto-Fill or Manual Fill
mode has not been selected (note the buttons are gray). The 6875D Freezer/Mill must be
connected to a LN Tank or LN Line to run in Auto Fill mode. To change from Auto Fill mode to
Manual Fill mode, touch the Manual button, the button will change from gray to blue indicating
the unit will now be filled manually. The Auto-Fill will turn gray indicating it is inactive or no
longer in Auto-Fill mode.
Open the lid and place the loaded sample vials in Chamber 1 and Chamber 2 (Dual mode), then
lock the Chamber Gate Handle (Section 6.3). Additional loaded sample vials can be placed in
the precool chambers while running samples in Chambers 1 and 2 (Figure 1). By precooling the
additional loaded sample vials, the PRECOOL time for these samples can be decreased or
eliminated during the next run. After all vials have been loaded, lower the lid and secure the
latch. The Auto Fill LN System will fill the tub with liquid nitrogen to the correct operating level.
LN Filling will be displayed on screen as the LN fills the tub, as shown in Figure 7.
Figure 7
–
LN Filling screen
