DSC Q Series Getting Started Guide
10
CAUTION: Drying out the DSC cell may be needed, if it has been exposed to humid
conditions. It is important to be certain that the instrument ground is adequately
connected to the facilities ground for safe operation.
Run the "Cell/Cooler Conditioning" test template to dry out the cell:
1 Ramp at 10°C/min to 400°C
2 Isothermal for 120 min.
Handling Liquid Nitrogen
Some
of
the
cooling
accessories
use
the
cryogenic
(low
‐
temperature)
agent,
liquid
nitrogen,
for
cooling.
Because
of
its
low
temperature
[
‐
195°C
(
‐
319°F)],
liquid
nitrogen
will
burn
the
skin.
When
you
work
with
liquid
nitrogen,
use
the
following
precautions:
WARNING: Liquid nitrogen boils rapidly when exposed to room temperature. Be certain
that areas where liquid nitrogen is used are well ventilated to prevent displacement of
oxygen in the air.
1.
Wear
goggles
or
a
face
shield,
gloves
large
enough
to
be
removed
easily,
and
a
rubber
apron.
For
extra
protection,
wear
high
‐
topped,
sturdy
shoes,
and
leave
your
pant
legs
outside
the
tops.
2.
Transfer
the
liquid
slowly
to
prevent
thermal
shock
to
the
equipment.
Use
containers
that
have
satisfactory
low
‐
temperature
properties.
Ensure
that
closed
containers
have
vents
to
relieve
pressure.
3.
The
purity
of
liquid
nitrogen
decreases
when
exposed
to
air.
If
the
liquid
in
a
container
has
been
open
to
the
atmosphere
for
a
prolonged
period,
analyze
the
remaining
liquid
before
using
it
for
any
purpose
where
high
oxygen
content
could
be
dangerous.
WARNING:
Potential Asphyxiant
Liquid nitrogen can cause rapid suffocation without warning.
Store and use in an area with adequate ventilation.
Do not vent the Liquid Nitrogen Cooling System (LNCS) container in confined
spaces.
Do not enter confined spaces where high concentrations of nitrogen gas may be
present unless the area is well ventilated.
The
warning
above
applies
to
the
use
of
liquid
nitrogen.
Oxygen
depletion
sensors
are
sometimes
utilized
where
liquid
nitrogen
is
in
use.
Содержание DSC Q Series
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