4-6
4.1.8 Adjusting contrast 
 
Contrast can be adjusted over 13 levels. 
Whenever 
  is pressed, the contrast is reduced (increased) from the current setting and after 
the contrast reaches the lowest (highest) level, the contrast increases (reduced) gradually. 
 
 
 
 
 
 
 
 
 
 
4.1.9 Turning off the alarm buzzer 
 
Buzzer sound can be turned off by pressing 
. 
The buzzer sounds if an alarm occurs. 
 
4.1.10 Alarm display 
 
When an alarm occurs, the event is notified with a popup menu and alarm sound. 
When 
  is pressed, the popup menu is cleared and the buzzer sound stops. However, display 
of ā
ā remains on the status bar unless the alarm is cancelled. 
Even after the popup menu is cleared and the buzzer sound is stopped, the invalid numerical 
number keeps blinking until the alarm is cancelled. 
 
 
 
4.1.11 Switching display 
 
The display screen is switched whenever   is pressed. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Display4
 
(D4)
Display1
 
(D1)
Display5 
   
(D5) 
Display6 
   
( D 6)
Display3 
   
(D 3)
Display2
   
(D2)