La Crosse Technology 308-1451 - Manual (Page 10)

Model: 308-1451 www.lacrossetechnology.com/support pg. 10
ABSOLUTE PRESSURE NUMBER
Absolute Pressure Number: Barometric Pressure is read by
the forecast station. Since this number is absolute pressure it
may not be the same as a local reporting station that reads in
relative pressure.
Note: The number cannot be calibrated.
Unit of Measure: (InHg or hPa):
 Hold the HISTORY button to switch from InHg (inches or
mercury) or hPa (Hecto Pascal).
PRESSURE HISTORY
1. Press the HISTORY button to view numeric pressure
history.
2. 0 is current pressure. -1 through -12 reflects the pressure
history in one-hour increments.
12 HOUR PRESSURE HISTORY GRAPH
 The bar chart indicates the pressure trend over the last 12
hours.
 The columns represent the pressure change readings at
specific times.
 The “0” is equal to the current pressure and each bar
represents how past pressure was compared to the current
pressure.
 Read the graph from left to right. 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.
Note: The bar graph will scroll
to prevent LCD burnout.