Kestrel 4300 (Construction) - Manual (Page 13)

Kestrel ® 4300 Construction Weather Tracker 25
MEMORY CAPABILITIES
Store Rate Total Memory
2 sec 59 minutes, 44 seconds
5 sec 2 hours, 2 min, 20 sec
10 sec 4 hours, 58 min, 40 sec
20 sec 9 hours, 57 min, 20 sec
30 sec 14 hours, 56 min
1 min 1 day, 5 hours, 52 min
2 min 2 days, 11 hours, 44 min
5 min 6 days, 5 hours, 20 min
10 min 12 days, 10 hours, 40 min
20 min 24 days, 21 hours, 20 min
30 min 37 days, 8 hrs
1 hr 74 days, 16 hrs
2 hr 149 days, 8 hrs
5 hr 373 days, 8 hrs
12 hr 896 days
GLOSSARY
The below definitions have been greatly simplified in order to keep this section brief. We strongly
recommend that anyone who wishes to make use of these measurements refer to one of the many
excellent weather references available for a more in-depth definition.
On the internet, visit www.usatoday.com or www.noaa.gov. Or, locate the USA Today publication, The
Weather Book. Please note that any words in a definition printed in italics are themselves defined in this
glossary.
Altitude
The distance above sea level. The Kestrel Meter calculates altitude based on the measured station pressure
and the input barometric pressure - or “reference pressure”.
Barometric Pressure
The air pressure of your location reduced to sea level. Pressure will change as weather systems move into
your location. Falling pressure indicates the arrival of a low pressure system and expected precipitation or
storm conditions. Steady or rising pressure indicates clear weather. A correct altitude must be input for the
Kestrel Meter to display barometric pressure correctly.
Density Altitude
The altitude at which you would be, given the current air density. Often used by pilots in order to determine
how an aircraft will perform. Also of interest to individuals who tune high performance internal combustion
engines, such as racecar engines.
Dewpoint
The temperature to which air must be cooled in order for condensation to occur. The difference between
dewpoint and temperature is referred to as the “temperature/dew point spread”. A low dewpoint spread
indicates high relative humidity, while a large dewpoint spread indicates dry conditions.