Specifications

DELTA LTL-XL Retroreflectometer 15
SECTION 3
THE USER INTERFACE
Figure 4: The display
Display and keyboard layout
The user interface consists of a rectangular display surrounded by push buttons.
The display has two main modes: the measurement display (HOME screen) and the menu dis-
play. The instrument will start up with the measurement display shown. The display area is
divided into four areas: a large main display in the middle, an icon row at the top, a message
or caption field underneath and an icon row at the bottom.
Measurement display
Here the last measured R
L
and/or Qd values are presented with large digits together with other
information. On the graphic above, all possible information is shown in the display. If a func-
tion is deactivated, it will not be shown. The actual date and time is always shown.
Upper icon row
The upper row of icons is accessed by pressing the UP button ▲. One of the icons is then
highlighted and can be activated by pressing the OK button. The other icons in the row can be
accessed by using the LEFT ◄ or RIGHT ►buttons. The meanings of the icons are (from left
to right):
 Series ID selection, can be switched off (see pg.26).
 User ID selection, can be switched off (see pg. 19).
 Error/warning alarm. Will be shown in case of an error/warning (see pg. 36).
 GPS indication (see pg. 24).
 Battery status (see pg. 39).