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the weighted average which only appears if a WBGT is displayed and all three
sensor bars are attached.
The following measurements can be accessed on the display:
Screen 1:
WET (WET BULB)
DRY (DRY BULB)
Screen 2:
GLOBE
Screen 3:
WBGTi (WBGT INDOORS)
WBGTo (WBGT OUTDOORS)
Screen 4:
RH (Relative Humidity)
H.I. (Heat Index) or Humidex
Screen 5:
BAT (BATTERY VOLTAGE)
A series of dashes appear in the display if one of the following occur:
•
the Heat Index or Humidex is outside of its allowable range
•
the temperature is outside of its allowable range
•
a temperature sensor has failed
5. SENSORS
NATURAL WET BULB THERMOMETER
The natural wet bulb thermometer gives an indication of the effects of
humidity on an individual. Relative humidity and air flow are taken into
account by measuring the amount of evaporative cooling taking place at a
thermometer covered with a moistened wick. The QUESTemp uses a cotton
wick immersed into a reservoir containing distilled water. Ordinary tap water
should not be used, as the contaminants that are left behind after evaporation
will shorten the life of the wick and cause high readings. If the wick is
discolored it should be replaced. To replace the wick, slide the old wick off
the top of the sensor. Place a new wick over the sensor, making sure that the
bottom of the wick is down in the reservoir.
GLOBE THERMOMETER
The globe thermometer gives an indication of the radiant heat exposure on
an individual due to either direct light or hot objects in the environment.
This is accomplished by placing a temperature sensor inside a blackened
