La Crosse Technology WS-9257U-IT User Manual
Page 21
21
Note:
Once the weather tendency indicator has registered a change in air pressure, it will remain
permanently visualized on the LCD.
AIR PRESSURE HISTORY (ELECTRONIC BAROMETER WITH BAROMETRIC
PRESSURE TREND)
The right side of the second section on the LCD shows the air pressure history bar graph.
The bar graph indicates the air pressure history trend over the past 12 hours in 7
steps (+0.15, +0.09, +0.03, 0, -0.03, -0.09, and
–0.15 inHg) at the points 0, -3, -6, -9 and -12
hours
. The “0h” represents the current full hour air pressure recording. The left column shows the
unit in “inHg” (0, ±0.03, ±0.09, ±0.15). The “0” in the middle of this scale is equal to the current
pressure and each change (±0.03, ±0.09, ±0.15) represents how high or low,
in “inHg” scale, the
past pressure was compared to the current pressure.
If the bars are rising it means that the weather is getting better due to the increase of air pressure.
If the bars go down, it means the air pressure has dropped and the weather is expected to get
worse from the present time “0h“.
Air pressure trend over the last 12 hours
Air pressure unit in inHg