P a g e
|
21
24
HOUR
RAINFALL
ALARM
1.
The
24
‐
hour
rainfall
alarm
display
will
be
shown.
2.
Press
and
hold
the
SET
key
for
about
2
seconds.
The
24
‐
hour
rainfall
digit
will
flash.
3.
Press
the
▲
UP
ARROW
key
or
▼
DOWN
ARROW
key
to
set
the
24
‐
hour
rainfall
alarm
value.
4.
Press
the
ALARM
key
to
confirm
the
setting.
The
digit
will
stop
flashing.
5.
Press
the
SET
key
to
switch
on
or
off
the
alarm.
The
(((
)))
icon
indicates
the
alarm
is
switched
on.
6.
Press
the
ALARM
key
to
exit
the
alarm
setting
mode.
HYSTERESIS
To
compensate
for
fluctuation
of
the
weather
data,
which
may
cause
the
weather
alarm
to
ring
constantly
if
the
measured
reading
is
close
to
the
alarm
level,
a
hysteresis
function
has
been
implemented
for
each
weather
alarm.
For
example,
if
the
high
temperature
alarm
is
set
to
77°F
and
the
temperature
reaches
77°F,
the
alarm
will
be
activated.
If
the
temperature
then
drops
to
76.8°F
(a
change
of
less
than
1.8°F)
and
then
increases
to
77°F
again,
the
data
will
blink,
but
no
alarm
will
be
activated.
The
temperature
would
have
to
drop
below
75.2°F
(with
a
pre
‐
set
hysteresis
of
1.8°F)
so
that
the
alarm
can
be
produced
again.
Hysteresis
values
for
the
various
weather
data
types
are
given
in
the
table.
Note:
The
temperature
or
humidity
data
will
keep
flashing
even
after
a
weather
alarm
has
been
switched
off
by
a
key
press.
The
flashing
value
indicates
that
the
current
weather
condition
is
out
of
the
pre
‐
set
weather
alarm
limit(s).
WEATHER
FORECAST
AND
WEATHER
TENDENCY
WEATHER
FORECASTING
ICONS:
Sunny
Cloudy
with
sunny
intervals
Rainy
For
every
sudden
or
significant
change
in
the
air
pressure,
the
weather
icons
will
update
accordingly
to
represent
the
change
in
weather.
Weather
data
Hysteresis
Temperature
1.8°F
Humidity
3%
RH
Pressure
0.029
inHg
Wind
speed
6.2
mph
