This standard specifies 3 standard climates for ambient air in terms of temperature, relative humidity, dewpoint temperature, pressure and air speed. These 3 climates are referred to by their temperature and relative humidity only, using the following abbreviations:
23/50 = +23C & 50%RH
20/65 = +20C & 65%RH
27/65 = +27C & 65%RH
In addition, each of these climates can have 1 of 3 different tolerances for the maximum deviation of temperature and humidity, using the following class numbers:
0.5 = +/-0.5C & +/-1.5%RH
1 = +/-1.0C & +/-3.0%RH
2 = +/-2.0C & +/-6.0%RH
The above abbreviations and class numbers appear after the main standard number as a suffix. So, for example, the full DIN reference for a standard climate of +23C +/- 1.0C & 50%RH +/-3.0%RH is DIN 50 014-23/50-1.
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