User guide

55
What are Discomfort Index (DI) and Dew Point Temperature
(DT)?
＊＊What is DI and DT?＊＊
● Discomfort Index (DI)
Discomfort Index is an index to show how uncomfortable it is in the summer
time.
CLIMOMASTER use the formula, shown below, which is used by
Meteorological Agencies.
）（（℃） RH HumidityH:RelativeureT:Temperat
Where
THTDI
%
3.46)3.1499.0(01.081.0 
DI Scale
Comfortable
Little
Uncomfortable
Uncomfortable
Very
Uncomfortable
Cannot
Endure
68 70 75 80 86
● There are many formulas to calculate Dew Point Temperature,
but for A531, we have adopted the most general “Antnione” formula,
which is used to calculate saturated vapor pressure.
235)]ln(5614.23/[183.4030
::
:%:
100
322.133)]235/(183.40306686.18exp[




eDT
PaureVaporPressePareaporPressuSaturatedVE
eTemperaturTRHmidityRelativeHuH
Where
EH
e
TE
）（） （
（℃）） （