6875D Freezer/Mill
1300-87052-1A, REV 1
SPEX SamplePrep LLC
Page 8 of 36
4.2 Power Switch and Controller
Electric power to the Freezer/Mill is controlled by a rocker switch on the inlet module. It is
marked with two numerical symbols (0 for OFF and l for ON). Press the
“l”
side of the switch to
turn the power ON, or press the
“
0
”
side of the switch to turn the power OFF. When power to
the mill is turned ON, the controller display will light up followed by a beep.
The controller is a touchscreen that can be activated by a fingertip or stylus. Run data is
transferred to other computer devices via USB Port, located in back of the controller. The
6875D Freezer/Mill can be programmed to operate Chamber 1 only, or Chamber 1 and
Chamber 2 simultaneously through the control panel by successive screens which are described
and illustrated in Section 5.2. The programmable parameters include Cycles (number of
grinding periods), Precool Time (initial chilling of sample), Run Time (grinding period), Cool Time
(time between grinding periods), and Rate (speed of the impactor in cycles per second). The
control panel also displays a warning if the lid is not fully closed, or if there is not enough liquid
nitrogen in the tub.
The viewing angle of the controller on the 6875D Freezer/Mill can be adjusted to minimize
glare. To adjust the viewing angle, simply grasp the back of the controller box and gently pull it
forward until the desired angle is reached, as shown in Figure 3. If it is necessary to send the
unit back to SPEX SamplePrep for service, be sure to return the controller to its horizontal
position before packing the unit for shipping.
Grasp controller from the rear and
gently pull forward to adjust viewing
angle from the horizontal position.
USB Port
(back of controller)
Figure 3
–
Adjust the Viewing Angle of the Controller
