6875D Freezer/Mill
1300-87052-1A, REV 1
SPEX SamplePrep LLC
Page 10 of 36
4.3 Liquid Nitrogen Connection
(Cont’d)
4.4 Lid, Coil Assembly and Gate, LN Sensor
The lid of the 6875D Freezer/Mill supports the coils (dual electromagnet assembly), two
precooling chambers, and grinding Chamber 1 and Chamber 2 enclosure. To open the lid, hold
the lid down with one hand, and with the other hand pull the upper end of the latch toward
you. Then pull the lower end of the latch to detach it from the cabinet. Release the lid and it
will raise up by the gas spring arms. The gas spring arms will keep the lid in the upright
position. The lid must be open for insertion and removal of vials.
A vial can be inserted into either precooling chambers, or Chamber 1 and Chamber 2 of the
assembly. The Gate keeps the vial(s) in place during grinding for Chambers 1 and 2 only. The
vials in the precooling chambers will remain secure and unaffected by the magnetic coils in
Chamber 1 or Chamber 2.
Do not run the 6875D Freezer/Mill without a loaded sample vial in
the grinding Chamber(s) that is active (programmed to grind)
.
The Gate (Figure 1) holds the vial(s) in Chambers 1 and 2 during grinding. To lock a vial in place,
turn Gate Handle to the left, and position it to pass through the slot in the open Gate. Now
close Gate and turn Gate Handle to the right against the Gate, then fold down Gate Handle to
Safety Valve
1/2” female JIC
connects to LN Tank or
LN line
1/2” female JIC
LN Transfer Hose
3/8” female NPT
3/8” male NPT
1/2” female JIC
1/2” male JIC
on 6875D
Swivel Joint
Adapter
Apply Teflon tape here
Figure 4
- Liquid Nitrogen Connection
(included
with 6875D, except for LN Transfer Hose)
