13
Note
2
:
During
the
CO2
warm
‐
up
period,
the
II’s
programmed
altitude
is
displayed
and
should
be
confirmed
by
the
user
to
be
acceptably
close
to
their
actual
altitude
(or
elevation).
The
II
unit
is
set
by
default
at
time
of
manufacture
to
assume
a
user
altitude
of
1000
feet
(304
meters)
which
will
give
CO2
accuracy
within
+/
‐
3
mmHg
for
user
altitudes
anywhere
from
sea
level
to
approximately
2000
feet
(610
meters).
For
best
accuracy
of
CO2
measurement,
the
user’s
current
altitude
should
be
set
using
the
Set
Altitude/Time/Date
option
#6
on
the
setup
menu
(see
the
II
Operator’s
Manual
for
instructions
to
get
into
the
set
‐
up
menu
or
refer
to
the
instructions
above).
This
#6
setup
option
will
allow
the
user
to
set
the
elevation
to
the
nearest
100
feet
(30
meters)
which
will
eliminate
the
potential
small
offsets
mentioned
above
if
the
user
is
substantially
different
from
1000
feet
(304
meters)
altitude
programmed
in
as
the
default
altitude
at
time
of
manufacture.
After
changing
the
altitude,
the
unit
will
retain
the
new
altitude
until
it
is
changed
by
the
user
again.
