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14
1.
Press
the
▲
UP
ARROW
key
or
▼
DOWN
ARROW
key
to
toggle
between
the
unit
“mph”,
“km/h”,
"bft",
"knots"
or
“m/s”
2.
Press
the
SET
key
to
confirm
and
to
enter
the
RAINFALL
UNIT
SETTING
.
RAINFALL
UNIT
SETTING
The
rainfall
unit
can
be
set
as
inch
or
mm.
The
default
unit
is
inch.
1.
Press
the
▲
UP
ARROW
key
or
▼
DOWN
ARROW
key
to
toggle
between
the
unit
“inch”
or
“mm”
2.
Press
the
SET
key
to
confirm
and
to
enter
the
RELATIVE
AIR
PRESSURE
UNIT
SETTING
RELATIVE
AIR
PRESSURE
UNIT
SETTING
The
relative
air
pressure
can
be
set
as
inHg
(inches
of
mercury)
or
hPa
(hectopascal).
The
default
unit
is
inHg.
1.
Press
the
▲
UP
ARROW
key
or
▼
DOWN
ARROW
key
to
toggle
between
the
unit
“inHg"
or
“hPa”
2.
Press
the
SET
key
to
confirm
and
to
enter
the
RELATIVE
PRESSURE
REFERENCE
VALUE
SETTING
.
RELATIVE
PRESSURE
REFERENCE
VALUE
SETTING
Note:
For
an
exact
measurement,
it
is
necessary
to
adjust
the
barometer
to
the
local
relative
air
pressure
(related
to
elevation
above
sea
level)
.
Ask
for
the
current
air
pressure
of
the
home
area
(local
weather
service,
the
world
wide
web,
optician,
calibrated
instruments
in
public
buildings,
airport).
The
default
reference
pressure
value
is
29.91
inHg.
The
relative
air
pressure
can
be
manually
set
to
another
value
within
the
range
of
27.17
to
31.90
inHg
(920
to
1080
hPa)
for
a
better
reference.
1.
The
current
relative
pressure
value
will
flash.
2.
Press
the
▲
UP
ARROW
key
or
▼
DOWN
ARROW
key
to
increase
or
decrease
the
value.
Continually
holding
the
key
will
allow
the
value
to
increase
faster.
3.
Press
the
SET
key
to
confirm
and
enter
the
WEATHER
TENDENCY
SENSITIVITY
SETTING
.
WEATHER
TENDENCY
SENSITIVITY
SETTING
The
sensitivity
of
the
weather
forecast
icons
to
changes
in
air
pressure
can
be
set
manually.
Smaller
values
result
in
a
more
sensitive
forecast.
The
switching
sensitivity
value
can
be
set
to
