AEROCET 532 Manual Rev B
Page 15
Selection
Description
Mass
When
MASS
is selected the unit will report PM levels
PM1, PM2.5, PM4, PM7, PM10 and TSP in µg/m
3
.
Counts
When
COUNTS
is selected the unit will report fixed
particle sizes:
0.3 µm, 0.5 µm, 1.0 µm, 2.5 µm, 4.0 µm,
5.0 µm, 7.0 µm, and 10.0 µm.
5.2.3. Mode
The sample
Mode
controls single sample or continuous sampling as illustrated below.
Selection
Description
Single
The
Single
setting configures the unit for a single
sample.
Continuous
The
Continuous
setting configures the unit for
continuous sampling.
5.2.4. Count Mode
The count mode determines if particle counts are displayed in
Cumulative
or
Differential
mode.
Cumulative
mode displays the particles as all sizes greater
than the selected size.
Differential
mode displays the counts as all particles
between the selected size and the next larger size channel. This setting is only valid for
count measurement type and will not appear on the Sample Setup screen if
Mass
measure is selected.
5.2.5. Sample Time
The
Sample Time
is the length of time the unit will sample for. In
Single
mode the
unit will stop sampling after this period and in
Continuous
mode the unit will continue
to sample at the sample time interval. The sample time is user selectable from 1
minute, 2 minutes, 5 minutes, 10 minutes, 15 minutes, 30 minutes, or 60 minutes.
5.2.6. Hold Time
The
Hold Time
is the time between samples when sampling in
Continuous
mode.
The
Hold Time
is user settable from 0
– 9999 seconds. The pump will remain on
during the hold period if the
HOLD
time is 60 seconds or less. The pump will stop after
each sample, and start a few seconds before the next sample, if the
Hold
time is
greater than 60 seconds.
Hold
times greater than 60 seconds will increase pump life,
as well as increase operating time because of lower battery usage. This setting will not
appear on the Sample Setup screen if
Single
mode is selected.
