Ambient Weather WS-1170 Manuel de l'utilisateur - Page 8

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4.2.1 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

Version 1.4

key or MIN/MAX key to increase or decrease

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