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6. Wet Bulb Globe Temperature (WBGT) Value and Heatstroke
Caution and warning are displayed in five levels, under the current temperature and humidity conditions.
■ If the level is determined as Danger, the whole 5-level indicator flashes.
WBGT °C display
To view the WBGT display while in the clock display mode, press the MODE button.
Level
WBGT value (°C)
5
31°C or higher Danger
4
28°C or higher
3
25°C or higher Warning
2
21 to 25°C
1
Below 21°C
The term "WBGT value (°C)" is obtained based on the values of temperature and humidity, referring to the
"Guideline for preventing heatstroke in daily life" published by the Japanese Society of Biometeorology.
Precautions on using the heatstroke indicator
● The heatstroke indicator should be used only as a guideline for controlling room temperature or people's
physical conditions. The risk of heatstroke depends on the physical condition of the individual, and the
degree of tolerance varies among individuals.
● The heatstroke indicator does not guarantee that heatstroke will or will not occur.
● The information shown by the heatstroke indicator may not match cautions and warnings issued by
public institutions.
Guideline for Preventing Heatstroke in daily life
Risk of occurrence in
relation to physical activity
Risk during any physical
activity
Severe
warning
Risk during moderate to
vigorous physical activity
Risk during very vigorous
Caution
physical activity
Clock display
Risk is high in the elderly, even when
resting. Avoid going out and stay in a
cool room.
Avoid direct sunlight outdoors and watch
for any rise in room temperature indoors.
Regularly take adequate rest when
exercising or doing vigorous work.
Basically low risk, but high risk when
doing vigorous exercise or heavy labor.
Very low risk
Source: Japanese Society of Biometeorology, April 2008
7
Absolute humidity display
Remarks
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