3-4 AeroTrak
®
Handheld Airborne Particle Counters
Basic Operation
This section explains the basic operation for using the keypad and
starting sampling.
Using the Keypad
Use the up and down keys to highlight a menu or a menu option then:
• If left and right arrows (< >) appear at the bottom of the screen, use the
left and right soft keys to select the option you want. Generally, there
will be only 2 or 3 options. Soft keys change function depending on the
display above them. For instance, in the picture above, the left soft key
is labeled RUN and the right soft key is labeled MENU. The center soft
key is not currently used.
• If no arrows appear at the bottom, press the Enter key to bring up
a secondary window from which you can make a selection or
modify a setting.
Use the up and down keys to perform operations such as increasing a
value. Use the right soft key and left soft keys to move right and left.
The ESC key always brings you back to the previous screen.