TSI Instruments SIZER EEPS 3090, Operation And Service Manual

Page: 164 / 185

E-2 Model 3090/3090AK Engine Exhaust Particle Sizer
TM
Spectrometer
An example of the setting screen is shown below.
Figure E-1
Analog Out Screen
H o w C a l c u l a t i o n s a r e M a d e
The calculations for determining the output voltages for any choice of
setting are based on the formulas shown below. The concentration
calculation is based on summing concentrations in each EEPS
spectrometer size channel (or portion of a size channel) to cover the total
size range times a diameter weighting (diameter to some power) and times
appropriate constants for the selected weighting and other settings:
Concentration signal:
 
o
max Dp,
min Dp,
n
p pw
pc
e S
N D D log d
D log d
dN
K C









 








  

