5
Operation and settings
46
5200-en_V2.0_06/20
5.2.6
Intelligent Aerosol Drying System (IADS) screen
The drying section IADS extracts moisture from the aerosol. Moisture such
as mist droplets could otherwise be interpreted as particles.
One of three settings can be selected in this screen. Please keep in mind:
Operation as certified measuring equipment is permitted only with the default
setting
remove volatile / moisture compensation
.
Menu path
Main menu > accessories > IADS
Intelligent Aerosol Drying System (IADS) screen
Setting
Effect
off
(for testing)
The IADS is switched off. But the internal tube in the IADS is
heated to +2K, based on the ambient temperature, to prevent
condensation inside of the IADS and the optical sensor.
remove volatile / moisture
compensation
(default setting for op-
eration as certified measuring equip-
ment)
The IADS dissolves volatile components of the aerosol and com-
pensates the water condensation as well as the consequent parti-
cle growth when the relative humidity is greater than 60%.
The setpoint temperature is set dynamically as a factor of the am-
bient temperature and humidity.
remove volatile and semi-
volatile
(for testing)
The IADS dissolves volatile and semi-volatile components of the
aerosol and compensates the effect of humidity on particle size.
The internal IADS heater is set to a constant temperature of
75 °C.
