Ambient Weather WS-1172 User Manual - Page 13
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4.5.6 Pressure Graph
Note: The weather station bar graph flashes from right to left to prevent screen burn in. This
feature cannot be turned off.
The pressure graph displays the barometric pressure for the last 24 hours. Each bar represents three
hours.
5. Glossary of Terms
Term
Absolute Barometric
Pressure
Accuracy
HectoPascals (hPa)
Hygrometer
Inches of Mercury (inHg)
Range
Relative Barometric
Pressure
6. Specifications
6.1 Wireless Specifications
Line of sight wireless transmission (in open air): 300 feet
Frequency: 433 MHz
Update Rate: 48 seconds
Version 1.0
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Relative barometric pressure, 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.
Accuracy is defined as the ability of a measurement to match the actual
value of the quantity being measured.
Pressure units in SI (international system) units of measurement. Same
as millibars (1 hPa = 1 mbar)
A hygrometer is a device that measures relative humidity. Relative
humidity is a term used to describe the amount or percentage of water
vapor that exists in air.
Pressure in Imperial units of measure.
1 inch of mercury = 33.86 millibars
Range is defined as the amount or extent a value can be measured.
Measured barometric pressure relative to your location or ambient
conditions.
Definition
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