FujiFilm EG-580UR Operation Manual page 67

(6) Press the balloon ring on the other side with your thumb to
fit it into the balloon attachment groove on the distal end
side.
(7) Point the distal end of the ultrasonic endoscope downward.
Press down the air/water valve fully to feed sterile water
of 5 ml or less.
[Note]
It takes approximately 3 seconds to feed in 5 ml of water.
Check the amount of water to be fed before use.
[Note]
Check that there is no water leak from the balloon.
(8) Press the suction valve fully to suck out all sterile water
inside of the balloon.
[Note]
If water cannot be discharged or little water is discharged
from the balloon, refer to "Chapter 5 Troubleshooting".
"Chapter 5 Troubleshooting"
(9) Feed water by pressing the air/water valve completely.
The air inside the balloon will be discharged completely.
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Chapter 3 Preparation and Inspection Before Use
67