Operation
PT12
Manual
7/20/2021
Page
30
of
48
One
of
three
different
coefficient
sets
will
be
shown
depending
on
the
subrange
selection.
Enter
the
probe’s
specific
coefficients
based
on
the
sub
range
selection.
Tap
the
save
button
to
ensure
the
values
persist
after
a
power
cycle.
If
using
a
smart
probe,
coefficients
are
stored
on
the
probe.
If
using
a
basic
probe,
coefficients
are
stored
on
the
PT12
channel.
In
the
PT12,
temperatures
are
determined
per
ITS90
in
terms
of
the
ratio
(
𝑊
)
of
the
resistance
of
a
probe
(
𝑅
)
at
a
given
temperature,
and
the
resistance
of
that
same
probe
at
the
triple
point
of
water,
R
TPW
(where
the
temperature
T
TPW
is
defined
as
273.16K):
