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4.2.2
Relative Pressure Calibration
You will want to calculate your barometric pressure to an official reporting station in your area.
Since barometric pressure does not drastically change in a 50 mile radius (unless the weather is
rapidly changing), this method of calibration is acceptable.
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.
4.2.3
Relative vs. Absolute Pressure
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.
4.3
Dew Point
While in normal mode, Press the
TEMP/+
key to view the Dew Point in the outdoor temperature
field. If key idle 30 seconds, the display will return to normal mode.
To exit the Dew Point display mode, press the
SNOOZE/LIGHT
key (on the top of the display
console), or wait 30 seconds for the timeout to take effect.
4.4
Multiple Channel Selection
If you have multiple wireless sensors, while in normal mode, press the
SET/CH
key to the
different channels. Temperature, humidity, and MAX/MIN records will be displayed for each
channel.
4.5
Alarms
4.5.1
View Alarm Time
While in normal mode, press the
ALARM
key to view the alarm time. The alarm icon will be
displayed in the time field.
Summary of Contents for WH32M
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