DAVIS Weather Monitor II Troubleshooting Guide download pdf (Page 28)

Using the Weather Functions

Page 24 Weather Monitor II

To Clear the Low Wind Chill

1. Press WIND CHILL.

2. Press RECL.

3. Press CLEAR and hold it down.

The display will ﬂash several times, and then the low wind chill will be replaced

by the current wind chill. As the wind chill falls, the low will be updated.

4. Press any key to exit.

To Use the Low Wind Chill Alarm

For instructions on how to use the low wind chill alarm, see “Alarms” on

page 30.

RAINFALL

Before you can use the rainfall function on your Weather Monitor II, you must

ﬁrst set up and install the optional Rain Collector. See the booklet included

with the Rain Collector for instructions on its use.

BAROMETRIC PRESSURE

The Weather Monitor II uses a solid state transducer to measure atmospheric

pressure. Since atmospheric pressure varies with altitude, the console adjusts

this measurement to give the equivalent sea level pressure, referred to as "baro-

metric pressure." The Weather Monitor II can display barometric pressure in

inches of mercury (IN), millimeters of mercury (MM), or millibars (MB).

Atmospheric pressure (and barometric pressure) also varies with local weather

conditions. Falling pressure is associated with deteriorating weather, while ris-

ing pressure is associated with improving weather. Standard or normal baro-

metric pressure is 29.92 inches or 760.0 mm of mercury (Hg) or 1013.2 millibars.

Since atmospheric pressure varies with both altitude and local weather condi-

tions, you must enter the current barometric pressure for your location when

you turn on your Weather Monitor II. Once the barometric pressure is set, the

Weather Monitor II calculates and display the correct barometric pressure until

the unit is moved to a different altitude.

The Weather Monitor II can also store a barometric pressure reading for com-

parison. With stored barometric pressure you can determine exactly how much

the barometric pressure has risen or fallen over a given period of time. Like the

highs and lows for other functions, the stored barometric pressure is accompa-

nied by the time and date it was recorded.

The Weather Monitor II also displays the barometric trend over approximately

the past hour. This trend is shown as an arrow in the bottom right hand corner

of the display.

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DAVIS Weather Monitor II Troubleshooting Guide Page 28