Revision 1.4.16a Page 7
Figure 6 – Powerdown Countdown Screen
3.3 Keypad Essentials
The DSM250 has a five-key keypad located below the screen. Each key has slightly different
functions depending on the operating mode. Figure 7 below shows the DSM250 keys and their
names.
Figure 7 – Keypad and Key Names
In the normal viewing mode where your favorite screens are displayed, the keys on the DSM250
keypad have the following functions:
Power Key ( ) – turns the DSM250 off (see section 3.1 on page 6 for details). A momentary
press of this key can also be used to accept or cancel an Alert (see section 8.2.1 on page 213
for details).
Lights Key (
) – a quick press cycles the backlight brightness between three programmed
brightness levels (see Section 5.2.4.3 on page 32 for details), while a long press cycles the
DSM250 through 8 programmable color palettes (see Section 5.2.4.4 on Page 32).
Up Ke
y ( ) – switches the display from the current favorite screen to the next highest
numbered favorite screen that is enabled for that particular mode.
Down Key ( ) – switches the display from the current favorites screen to the next lowest
numbered favorite screen that is enabled for that particular mode
Enter Key ( ) – changes from favorite screens mode to menu mode
In menu mode, a legend appears along the bottom of the screen displaying the function of each of the
keys. The functions differ slightly depending on whether a menu is being accessed, a selection is
being made from a list of possible data values, or a numeric value is being increased or decreased.
3.3.1 Navigating in a Menu
When accessing a menu, the keys on the DSM250 keypad have the following functions:
Power
Key
Enter
Key
Down
Key
Up
Key
Lights
Key
