5-16
Model 3090/3090AK Engine Exhaust Particle Sizer
TM
Spectrometer
3. Select the type of data you want to export, the data range, the type,
averaging interval, and format of the file to which you want to export
the data. Refer to Table 5-1 for a description of the parameters.
Table 5-1
Export Data Options
Parameter
Description
Data Types
Concentration
The total number of particles per unit volume of air
sampled (i.e., number concentration expressed as
#/cm
3
). Concentration is the primary measurement
of the Model 3090 EEPS system.
Volume
Volume represents the total volume of the particles
per unit volume of air sampled (i.e., volume
concentration expressed as nm
3
/cm
3
). The volume
concentration calculation assumes that all the
particles are perfect spheres.
Surface
Surface represents the total surface area of the
particles per unit volume of air sampled (i.e., surface
area concentration expressed as nm
2
/cm
3
). The
surface area concentration calculation assumes that
all the particles are perfect spheres.
Mass
Mass represents the total mass of the particles per
unit volume of air sampled (i.e., mass concentration
expressed as µg/cm
3
). The mass concentration
calculation assumes that all the particles are perfect
spheres with the density defined in the particle table
for each channel.
Raw Data (Instrument
Record)
Note:
Valid only with 3090 instruments with
firmware newer than 3.05.
Each data set collected has attached to it the raw
electrometer data. This data can be exported and
reviewed.
Units
Normalized (dW/dlogDp)
Concentration, surface, volume, mass values
exported are normalized to 16 channels per decade.
Number
Actual (non-normalized) values are exported.
Total Concentration
Total concentration on all channels.
Electrometer Current
If the run file contains data which is electrometer
current (see run settings), this option may be
selected.
Analog Input
Input voltage for Analog Input Channel 1 and 2 in
Volt.
Sample Temp
Sample temperature recorded during the run.
Pressure
Sample pressure recorded during the run.
Min-Max Concentration
Limits
Export the minimum and maximum concentration
limits for each channel. (Number or dN/dlogDp units
apply.)
Analog Output
Exports the Model 3090 EEPS Analog Output
settings that were in effect when the EEPS data was
collected. Only valid for Model 3090 with Analog Out
Option.
