4-4 Model 3775 Condensation Particle Counter
panel are in red. If this occurs, aerosol needs to be diluted
before entering the CPC.
If a Flash Memory Card is inserted in the slot on the front panel of
the instrument, data is saved to the card when START is selected.
In this case, the Flash Card status on the front panel display shows
Logging. Left unattended, a new data file is created each hour, with
the number of data points determined by the data average period.
Data Average Period is described later in this chapter. If the data
collection is stopped using the STOP option, the current data file is
saved with less than one hour of data. If the data collection is not
properly stopped, such as instrument is turned off or the card is
removed, data from the current hour’s file will be lost.
The primary selectable functions are summarized below.
CURSOR Displays a vertical cursor on the graph (Figure 4-3).
Turning the knob moves the cursor within the graph
boundary, and presents the time data was taken and
number concentration at the bottom of the display.
MENU Displays menus for User Settings and Instrument
Status. See Figure 4-4.
STOP Stops the real-time graphical update of the particle
number concentration and properly closes the data
file in the Flash Memory Card.
START START is displayed once STOP is pressed. Press
START to initiate update of the graphical display, and
to save to the Flash Memory Card.
Figure 4-3
Display Showing Cursor
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