6. Maintenance & Check 53 
 
 
「KEY UNIT」 
・Make KEY UNIT a yellow display, press   or the [ENT] key, and the operation unit self test starts. 
・When the key on the operation panel is pressed, the name of the pressed key is displayed.   
However, it returns to the self test menu when the [CLR] key is pressed, and the [CLR] key is judged. 
 
「PRINTER TEST」 
・Make PRINTER TEST a yellow display, press     or the [ENT] key, and the test pattern is output (print). 
 
 
 
 
 
 
 
 
 
 
「ALERT TEST」 
・Make  ALERT  TEST  a yellow display, press    or the [ENT] key, and select it from the following, set 
content. 
Set content  :OFF/DEPTH ALARM/SYSTEM ALERT 
When DEPTH ALARM is selected, and the depth alert is set according to the following procedure, the test 
starts. 
・Menu  “ALERT"       “DEPTH ALARM"     “ALERT CONT"      “ON"  ・[ENT] key 
・Menu “ALERT"     “DEPTH ALARM"     “ALERT SETTING"       "A depth value that is deeper 
than 1/2 of the scale values is set"  ・  [ENT] key.  
 
・When the sea bottom lost alert  is set according to the following procedure after SYSTEM ALERT  is 
selected, the test starts. 
・Menu  “ALERT"     “SYSTEM ALERT"     “DEPTH LOST"     “ON" and [ENT] key 
・Set it to  “OFF" after ALERT TEST finishes.   
・When the [CLR] key is pressed, it returns to the self test menu.   
・  Return  “DEPTH ALARM" and  “SYSTEM ALERT" to original setting.