13
Note: To highlight the severity of conditions, if the Red Warning
Zone is reached, the line indicating the current zone will ash. If
the Black Warning Zone is reached, the measurement value will
ash inverted.
Note: If an alert is activated, pressing
on the WBGT
Measurement Screen will deactivate the alert until the next
higher threshold is reached or until the WBGT measurement dips
below the threshold and then raises above it again.
Note: In the Options Menu under Display, there is an Alerts
Test function which will activate the light and buzzer. When
using the unit in a new situation, test the alerts to familiarize
yourself with their intensity.
HOW TO MEASURE WBGT ACCURATELY:
» When changing environments (moving form an air
conditioned room to outdoors or removing the unit
from your pocket) the unit may require more than 15
minutes to equilibrate to its surroundings before taking
readings.
» Take measurements at least 3 feet o the ground and in
the same wind or air ow conditions as the people you
are monitoring. Ensure the Kestrel is oriented into the
wind and able to measure the full wind value. A tripod
or pole mount and the Kestrel Rotating Vane Mount are
ideal for ensuring accurate measurements.
» Dierences in the reectivity of ground surfaces such
as grass or asphalt will impact measurements. Be sure
to take measurements in the same solar/radiant heat
environment as the people you are monitoring.
1. POWER ON KESTREL. Press to power on Kestrel.
2. CONFIGURE WBGT SETTINGS.
1. Scroll to the WBGT Current Measurement Screen and
press select.
2. Set Type to either Indoor or Outdoor, depending
on your environment.
3. To use the colored WBGT zones (also known as Flag
Settings), scroll to Zones… and set to On. The zones
increase from White to Black in order of severity of
risk of heat injury.
4. To access one of the pre-saved WBGT guidelines,
scroll to Zones… and press select, then scroll to
Guide… and press select. Follow the menu options
to nd your organization’s WBGT guidelines. If
additional workload or clothing inputs are required,
wet Workload and Clothing to appropriate values
for your situation.
5. For information on setting custom threshold ag
settings see page13.
6. To receive light or buzzer alerts when WBGT is above
a zone threshold, scroll to and select Alerts… in the
WBGT Settings menu. You may set Light and Buzzer
individually. Selecting a zone for Light or Buzzer will
cause that alert to activate when conditions reach
the threshold for the selected zone.
Warning: In addition to monitoring WBGT values, please refer
to your state or organization’s requirements for measuring
WBGT, heat acclimatization guidelines, work/rest ratios and
water consumption.
CONFIGURE WBGT
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