TSI Instruments 3082, Operation And Service Manual

Page: 102 / 225

5-14 Electrostatic Classifier Model 3082 and SMPS Spectrometer Model 3938
Table 5-4
Y-axis Settings
Options Description
Max/Min Specify range over which data will be scaled. Use alphanumeric
on-screen keyboard to specify min and max. Note that data
cannot be scaled logarithmically.
Auto Scale Reset the y-axis scale to the full range of measurement. Max
and Min will be grayed out.
Weights Specify how the size distribution is weighted for data and
statistics on the SMPS screen.
Number Represents the number concentration (the
total number of particles per unit volume of air
sampled expressed as #/cm
3
).
Surface Represents the surface concentration (total
surface area of the particles per unit volume of
air sampled expressed as nm
2
/cm
3
).
Volume Represents the volume concentration (total
volume of particles per unit volume of air
sampled expressed as nm
3
/cm
3
).
Mass Represents the mass concentration (total
mass of the particles per unit volume of air
sampled expressed as
μg/ cm
3
).
Units Specify y-axis units for data and statistics on the SMPS screen.
Conc. dW Represents interval particle size distributions.
The concentration in any channel represents
the concentration within the particle size
boundaries for that channel.
dW/dlogDp Differential or normalized particle size
distribution, normalized to one decade of
particle size. This normalized concentration
format allows particle size distributions to be
compared regardless of the channel
resolution. Default unit used.
% Conc Displays each particle size channel as a
percentage of the total particle concentration.
Applies to data within View Boundaries only.
Cm. Conc Cumulative concentration displays the particle
concentration in a cumulative (summed)
format. Each particle size channel represents
the total concentration of particles measured
below its upper size boundary. Applies to data
within View Boundaries only.
Cm. % Conc Cumulative % concentration is the same as
cumulative concentration but displayed as a
percentage of the total concentration. Applies
to data within View Boundaries only.
Particle
Density Used in the mass and d50 calculations. Set to 1.0 (g/cm
3
) by
default.
OK Return to main screen. Graph and statistics will be updated
based on your selections.
Cancel Return to main screen and cancel any changes to y-axis
settings.