Chaney Instrument Weather Radio 13230 User Manual

This weather station has a pressure 

graph that tracks and displays the 

barometric pressure 12 hours ago as 

well as the current barometric pressure. 

Additionally, the graph will 

automatically display the “FALLING”, 

“STEADY” OR “RISING” icon and a 

curve to represent the rate of change 

over the previous 12 hour time period.

The daily high and low records are displayed for the indoor and outdoor 

temperature and humidity. These records ar cleared automatically every 

day at midnight.

The display unit has a signal reception icon near the outdoor temperature 

display area. If there are a low number of “bars” present, you may 

experience no temperature display ( “- -” ) or inacurracy. In either case, you 

may need to relocate one or both of the units. If most or all 4 of the bars are 

present, wireless reception is good and no action is required.

This feature gives you the predicted weather forecast for the next 12 to 24 

hours based on an advanced algorithm that includes barometric pressure 

and temperature. This weather station will provide the most accurate 

forecast that a single station weather instrument can provide.

This weather station has a patented “fourteen day learning mode” 

calibration process. During this learning mode the weather station will 

make altitude calculations that may affect the accuracy of the forecast. 

Once the 14 day learning mode process is complete, the learning mode 

icon will disappear and the weather forecast should be ready for superior 

operation.

Atmospheric Pressure is defined as the pressure at any location on the 

Earth, caused by the weight of the column of air above it. At sea level, 

atmospheric pressure has an average value of one atmosphere and 

gradually decreases as altitude increases. Also called barometric pressure. 

The weight of the atmosphere that envelopes Earth exerts pressure on all 

points of the planet's surface. Meteorologists use barometers to measure 

this atmospheric pressure (also called barometric pressure). At sea level the 

atmospheric pressure is approximately 1 kilogram per square centimeter 

(14.7 pounds per square inch), which will cause a column of mercury in a 

mercury barometer to rise 760 millimeters (30.4 inches). Variations in the 

atmospheric pressure greatly affect the weather. Low pressure generally 

brings rain. In areas of low air pressure, the air is less dense and relatively 

warm, which causes it to rise. The expanding and rising air naturally cools, 

and the water vapor in the air condenses, forming clouds and the drops 

that fall as rain. In high pressure areas, the air is dense and relatively cool, 

which causes it to sink. The water vapor in the sinking air doesnʼt condense, 

resulting in clear skies.