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Probe and Stir/Freeze Wire Alignment Cleaning and Maintenance
The flange of the mandrel must
be flush with the head chassis.
The black bead in the probe tip must
be in the center of a 0.2-mL sample
in the sample tube, at equal distances
from all nearby surfaces. It must be
the same distance from the bottom of
the tube as it is from the side walls.
The stir/freeze wire should be
about the width of the stir/freeze
wire away from the mandrel
where it exits from the mandrel.
The tip of the stir/freeze wire
should be about the width of the
stir/freeze wire away from the
probe. Bend the wire if necessary.
The tip of the stir/freeze wire
should be even with the top of the
black thermistor bead inside the
glass probe tip. Loosen the stir/
freeze wire setscrews to enable
vertical adjustment. Re-tighten the
setscrews gently to avoid cracking
the thin side wall of the mandrel.
Model 3250 Mandrel, Probe and Stir/Freeze Wire Adjustment
The flange of the mandrel must
be flush with the head chassis.
The black bead in the probe tip must
be in the center of a 2-mL sample in
the sample tube, at equal distances
from all nearby surfaces. It must be
the same distance from the bottom of
the tube as it is from the side walls.
The stir/freeze wire should be
about the width of the stir/
freeze wire away from the
mandrel where it exits from
the mandrel.
The stir/freeze wire should be
about the width of the stir/freeze
wire away from the tip of the probe.
Bend the wire if necessary. The
tip of the stir/freeze wire should
be even with the bottom of the
probe tip. Loosen the stir/freeze
wire setscrews to enable vertical
adjustment
Model 4250 Mandrel, Probe and Stir/Freeze Wire Adjustment
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