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The following quantities are reported:
Tnw: Humid temperature, measured by a natural ventilation wet bulb probe
Tg:
Globe thermometer temperature, measured by a globe thermometer probe
Ta:
Environment temperature, measured by a Pt100 probe
Pr:
Barometric pressure, measured by an internal sensor
Relative humidity, measured by a combined humidity/temperature probe
RH:
Va:
Wind speed, measured by a hot-wire probe
A resulting quantity is displayed in the central part of the display: In this example, the WI index,
that is, the WBGT index measured indoor or outdoor without solar radiation.
In order to select the displayed index, press SHIFT FNC: A drop-down menu is shown with the
following information:
• draught : DR index: draught risk
• wbgt :
WBGT index: wet bulb globe temperature
• wci :
WCI index: wind chill index
• trad :
average radiation temperature Tr
• unit :
temperature measurement unit
• data :
maximum, medium, average values
4.1.1 DR Index – Draught Risk
In order to calculate the DR index you need to know the turbulence intensity Tu obtained from the
wind speed. For the turbulence intensity Tu calculation, the instrument starts an automatic
procedure to capture the wind speed within a preset interval; at the end, the instrument displays the
turbulence intensity percentage value. The DeltaLog10 software is then used to obtain the DR
index.
To start the Tu index calculation, proceed as follows after opening the drop-down menu with
SHIFT FNC :
1. Use the arrow keys ▲▼ to select "draught ";
2. Press ENTER to confirm: the Tu message is displayed in the central line of the display;
3. Press ESC to exit the drop-down menu without making any change.
The following screen will appear:
HD32.1
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V2.1
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