Specifications

TEM PERATURE
ACCURACY
CHECKS
The DM44
is
calibrated to
its
original temperature
probe
and
should
be
recalibrated
to any
replacement
probe.
Refer
to the
DM44 lnstruction Manual
for
calibration
procedures.
For
the
following
accuracy
checks,
use
an accurate
thermometer
to
verify
water temperature.
Anything
in
solution
affects
the
melting
temperature, and the boiling
point
is
affected by
changes in
altitude and barometric
pressure.
Low Temperature
1. Allow a container
(preferably
insulated)
of
crushed
ice
to
melt
until there are only a
few
pieces
of
ice
remaining.
To
prevent posible probe
damage, ensure
that
only
the sealed
portion
of
the
probe
is immerced
(see
Figure l0).
Put the
probe
tip
into
the water, avoiding the sides
or
bottom of the
container. Wait
for
the
readout
to
stabilize,
indicating the
probe
has reached
the
water
temperature.
The
readout
should
be between
-2o
C
to
2o C.
There
should
be
ice remaining
after
the test to
verify
that
inserting
the
probe
did
not raise
the
water tem-
perature.
High
Temperature
1. Bring water to
a slow
boil
(to
prevent
splattering).
2.
Put
the
probe
tip
into
the water, avoiding the sides or
bottom of the
container. Wait
for
the
readout
to
stabilize,
indicating
the
probe
has reached
the
water
temperature.
3. The
readout
should
be between
g8o
C and
102o C
for
fresh
water at sea
level.
2.
3.
@
32
4658/DM44
Operators