Abbreviations and definitions
DC
Diffusion charging, diffusion charger
d
diameter, number based geometrical average mobility diameter, geometrical
standard deviation 1.4 ...1.6
E
Efficiency
HV
High voltage
LED
Light-emitting diode
N
Number concentration
Safety information
General notes and warnings
This operation manual must be read completely before using the HEPaC. Incorrect use
or handling and any consequences arising from this may damage the device or endan-
ger personnel.
The manufacturer declines all liability resulting from incorrect use and handling.
During operation the evaporation tube is hot, do not touch.
Do not measure a vehicle with the charger connected to the HEPaC sensor unit!
Safety notes
Never operate the instrument at condensing conditions.
Do not blow into the instrument.
Do not open the HEPaC as you may damage it.
The HEPaC is a sensitive instrument made for measuring nanoparticles. Sampling too
much coarse dust will eventually lead to deteriorating instrument performance.
Do not operate the HEPaC in an explosive atmosphere or in the presence of flammable
gases or fumes.
Have your instrument recalibrated once a year.
3
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