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05509F DCN6409 39
7. OPERATION
7.1. Front Panel Overview
The M465L front panel provides a number of functions in addition to displaying the current
ozone concentration being measured. Figure 7-1 below shows the display and keypad portion of
the front panel.
Figure 7-1: Front Panel Display
7.1.1. Ozone Concentration Display
The 4-character LED display in the center of the front panel normally shows the current ozone
concentration being measured by the M465. While displaying concentration, one of the unit-of-
measure indicators (i.e., PPM, PPB, or UGM) should be backlit, indicating the current
measurement units. If none of these indicators are backlit, then the display is in Menu mode or
Startup mode and is not displaying the concentration. If the display is in Menu mode, the
display can be returned to Concentration mode by repeatedly pressing the CFG button until one
of the unit-of-measure indicators is lit. Note that even when the display is in Menu mode,
normal measurement and stream selector operation will continue in the background.
7.1.2. Menu Navigation Keypad
The menu navigation keypad (CFG, ENT and UP/DOWN buttons) is used to navigate the
various menu items available on the M465L. The menus allow the user to view operational
parameters of the instrument as well as view and modify the configuration of the instrument.
See Section 7.2 for more detailed information.