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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
Opes™ Weather Station to match the official reporting station.
To change the relative pressure when flashing, press the
+
key or
MIN/MAX
key to increase or decrease
the relative pressure setting to match the official reporting station.
5.3 Alarm Modes
- While in Normal Mode press the
ALARM
key to enter the High Alarm Mode
- Press the
ALARM
key again to enter Low Alarm mode
Remark: after the initial pressing of
ALARM
key, the display will be refreshed to show current high,
low alarm value. Normal alarm value will be displayed only for those already activated, all other not
activated values will be displayed
with “---“or”--“instead.
- Press the
ALARM
key again to return the Normal Mode
- In the High Alarm Mode press the
SET
key to select the following alarm modes:
6.
Time alarm (hour/minute)
6.
Indoor humidity high alarm
6.
Indoor temperature high alarm
6.
Outdoor humidity high alarm
6.
Outdoor temperature and dew point high alarm
6.
Pressure high alarm
- In the Low Alarm Mode press the
SET
key to select the following alarm modes:
1. Time alarm (hour/minute)
2. Indoor humidity low alarm
3. Indoor temperature low alarm
4. Outdoor humidity low alarm
5. Outdoor temperature and dew point low alarm
6. Pressure low alarm
- In the alarm modes, Press
+
key or
MIN/MAX
key to change or scroll the alarm value. Hold the
+
key or
MIN/MAX
key for 3 second to change the number in greater steps. Press the
ALARM
key to choose
the alarm on or off (if alarm is enabled, the speaker icon on the LCD will be turned on indicating the
alarm function has been enabled). Press the
SET
key to confirm the setting and continue pressing the
SET
key to toggle through each alarm mode until it returns to the normal display mode.
- Press
SNOOZE/LIGHT
key or no key for 10 seconds and the alarm mode will return to Normal Mode
Canceling the Temperature Alarm While Sounding
a. When a set weather alarm condition has been activated, that particular alarm will sound and flash for 120
seconds. Press any key to mute the alarm. When weather alarm condition is activated again within 10
minutes, alarm will not sound but will continue to flash until weather conditions have become more steady.
This feature is useful to avoid repeated triggering for the same alarm value.
