AEROCET 532 Manual Rev B
Page 12
4.4.
Sample Related Functions
The following sub-sections cover sample related functions.
4.4.1. Starting/Stopping
To start or stop a sample, press the
START/STOP
key. A sample event can be manually
started or stopped from either the Operate screen or the menu.
4.4.2. Measurement Type
The measurement type determines if the instrument reports mass (µg/m
3
) or particle
concentration (particles/volume). Measurement type is discussed in section 5.2.
4.4.3. Sample Mode
The sample mode controls single sample or continuous sampling. Sample modes are
discussed in section 5.2.3
4.4.4. Count Mode
The count mode determines if particle counts are displayed in
Cumulative
or
Differential
mode. Count modes are discussed in section 5.2.4
4.4.5. Sample Time
The sample time is the length of time the unit will sample for. The sample time is user
selectable for 1, 2, 5, 10, 15, 30, or 60 minute samples.
4.4.6. Hold Time
The hold time is used when the sample mode is set to auto (continuous sample). The
hold time represents the time from the completion of the last sample to the start of the
next sample. The hold time is user settable from 0
– 9999 seconds and is discussed in
section 5.2.6.
4.4.7. Sample Timing
The following figures depict the sample timing sequence for both manual and auto
sampling modes. Figure 8 shows the timing for manual sample mode. Figure 9 shows
the timing for auto sample mode.
Figure 8
– Manual Mode Sample
Figure 9
– Auto Mode Sample
Start
Time
Sample Time
Stop
Time
Start
Time
Sample Time
Hold Time
Sample Time
Stop
Time
