Backlight
• The instrument has a backlight
timer function to help maintain
maximum battery life.
• To select the backlight from the
main menu press 6, the display
will show backlight timer on. The
backlight will now turn off after 5
minutes operation – press any key
to turn back on.
• To turn the backlight timer off (ie
to have the backlight constantly
on) select 6 again from the menu.
The display will now show
backlight timer off.
• Please note that to preserve
battery life the SMF4 will
automatically turn off after 10
mins of inactivity when the
backlight timer is on. Press the
ON key to activate the display.
