ECOWITT HP3501, Руководство по эксплуатации

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by humans, as opposed to the measured ambient air temperature. The
passing flow of lower temperature air makes it feel “colder” and this is
reflected in the wind chill temperature. Conversely, if it feels warmer than
the measured air temperature due to the effects of humidity, we use a
heat-index temperature to indicate how warm it feels.
The “dew point” is not a perceptual value, but it is calculated from the
sensor values (temperature and humidity). The dew point is the temperature
to which air has to be cooled to become saturated, and beyond which
airborne water vapor would become liquid (dew).
5.1.2 Rain data
The normal mode has a segment for displaying rainfall related data. Press
the
RAIN/+ button to alternate the display between:
 Rain rate: amount of rainfall accumulated in the past 60 minutes
 Rain day: amount of rainfall accumulated since midnight
 Rain week: amount of rainfall accumulated since the start of the week.
The week starts when Sunday begins and ends exactly 7 days later
 Rain month: amount of rainfall accumulated since the start of the current
month
 Rain year: amount of rainfall accumulated since the start of the year
5.1.3 Graphed data
The normal mode has an area that displays a graph of historical data. The
graph will span a period of 12, 24, 48 or 72 hr. This is controlled from a
setup menu (see section 5.2.6). Press the
GRAPH
button to alternate the
displayed graph between:
 Indoor and outdoor temperature
 “Feels Like” temperature and dew point temperature
 Indoor and outdoor humidity
 Absolute (ABS) and Relative (REL) barometric pressure
 Wind speed and gust speed
 UV-index