6.1 General Description
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The calibration data is stored in a FLASH memory and saved in
case of power down.
The operational safety of the evaluation unit and the detector is
ensured by a permanent self monitoring with error code display
and by plausibility checks; all important data are saved in a Flash
memory.
Display
The illuminated display field of the instrument comprises 4 lines;
the first three lines show the menu titles, the currently selected
parameters or the current measurement value. The bottom line
shows the current function of the softkey button located below or,
when a measurement is running, the status ārunā.
Keypad Function
The evaluation unit is operated via the softkeys and function keys
described below; with these keys you can select the operating level
you want within a menu structure in order to select a function or
enter parameters. The menu guidance is illustrated in the quick
overview of the menu structure (see next page) and from the ta-
bles giving an overall view of the menu structure (see the Appen-
dix).
Softkeys
Softkeys are used to select different menu groups and operating
levels within the menu structure. Depending on the current posi-
tion in the menu structure, functions are assigned to these keys,
as shown on the display above the respective key.
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