Ambient Weather WS-1170 Manuale d'uso - Pagina 8
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Stampa la pagina4.2.1 Setting Barometric Pressure
The display console displays two different pressures: absolute (measured) and relative (corrected to
sea-level).
To compare pressure conditions from one location to another, meteorologists correct pressure to
sea-level conditions. Because the air pressure decreases as you rise in altitude, the sea-level corrected
pressure (the pressure your location would be at if located at sea-level) is generally higher than your
measured pressure.
Thus, your absolute pressure may read 28.62 inHg (969 mb) at an altitude of 1000 feet (305 m), but
the relative pressure is 30.00 inHg (1016 mb).
The standard sea-level pressure is 29.92 in Hg (1013 mb). This is the average sea-level pressure
around the world.
Relative pressure measurements greater than 29.92 inHg (1013 mb) are
considered high pressure and relative pressure measurements less than 29.92 inHg are considered low
pressure.
To determine the relative pressure for your location, locate an official reporting station near you (the
internet is the best source for real time barometer conditions, such as Weather.com or
Wunderground.com), and set your weather station to match the official reporting station.
To change the relative pressure is flashing, press the
the relative pressure setting to match the official reporting station.
4.3
Alarm Mode
4.3.1 Alarm Display
While in Normal Mode, press the ALARM key to enter the High Alarm Mode. Press the ALARM
key again to enter the Low Alarm Mode. Press the ALARM key again to return to normal mode (or
wait 10 seconds).
Note: After entering the ALARM mode, the console will display the high and low alarm
settings. If the value reads --.-- (dashes), the alarm is not active.
4.3.2 Alarm Programming
While in Alarm Mode, press the SET key to set the alarms. The following are high and low alarms:
High Alarm Limits:
Time alarm (hour/minute)
Indoor humidity high alarm
Indoor temperature high alarm
Outdoor humidity high alarm
Outdoor temperature / dew point high alarm
Pressure high alarm
Low Alarm Limits:
In the Low Alarm Mode press the SET key to select the following alarm modes:
Time alarm (hour/minute)
Indoor humidity low alarm
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key or MIN/MAX key to increase or decrease
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