Kestrel 4000 - Manual (Page 19)

19
KESTREL 4300 CONSTRUCTION WEATHER
TRACKER:
Evaporation Rate
The Kestrel 4300 will display the Evaporation Rate, as
defined in ACI 308, based on instantaneous Wind Speed,
Relative Humidity, Ambient Temperature and Concrete
Temperature readings.
Evaporation is a guide to how quickly concrete will lose
moisture in their pour location conditions.
to measure Evaporation Rate:
• First, use a separate measuring device to obtain the
Concrete Temperature.
• Use or to scroll to the Evaporation Rate screen,
then press .
• Use or to enter the Concrete Temperature you
obtained.
• Press to exit the Setting Screen, then press to
enter the Averaging Screen.
Make sure the Kestrel 4300 is shaded while it takes the
reading. Failure to shade the unit may cause inaccurate
readings that will not meet ACI 308 criteria.
• Position the Kestrel 20 inches above the concrete and
facing the wind, and press to begin readings.
• Count 6-10 seconds, then press again to stop
collection.
• The screen will display Avg/Min Evaporation Rate
readings.
• To clear data, press .
KESTREL 4400 + 4600 HEAT STRESS TRACKERS:
Measuring
The unit will calculate and display Wet Bulb Globe
Temperature based on Globe Temperature, Relative
Humidity, Ambient Temperature, Barometric Pressure
and Wind Speed.
to Change WBGt settings:
• Press
while on the Wet Bulb Globe Temperature
screen.
• Use or to change the “Type” setting between
outdoor and indoor, (see glossary for more info).
• Use to scroll to “App”, then use or to change
the Application.
• Press to exit the WBGT settings screen.
No risk
Low risk
Moderate risk
Moderate risk
High risk
Extreme risk
Your Kestrel Heat Stress Tracker allows you to activate
and set up to six customized heat stress warning zone
thresholds to trigger warnings identified by color names
on screen. The warnings are in increasing order of
severity of risk of heat injury as shown.
sIX usER-sEttaBLE WaRnInG
ZOnEs
The Kestrel Heat Stress Trackers
allow you to customize the settings
of your heat-related warning zones
based on your specific needs.