Pentax EG-2990i Instructions For Use Manual page 19

CAUTION:
To avoid damaging the endoscopes, do NOT twist, rotate or bend
excessively any of the strain relief boots (1), (2) during inspection, clinical
use, reprocessing or any handling activity. Be particularly cautious for the
insertion tube strain relief boot (1). When wiping the insertion tube and
the umbilical cord, use a slow back and forth motion to wipe them along
the tube/cable. Never apply excessive force or torque on these strain relief
boots or slim tubes/cables. During ANY handling of the instrument avoid
excess force, twisting, rotation and/or bending of the actual insertion tubes
and umbilical cord to prevent inadvertent damage (crush, compression,
deformity, etc.) to these parts as well as to internal components contained
within the endoscope.
Do NOT Twist or Rotate
Figure 2.8
3) Inspection of Angulation Controls and Locks
a) Slowly manipulate the Up/Down and the Right/Left control knobs to see that
they function smoothly. Be certain that a full and appropriate range of angulation
is possible.
b) Check that the observed image turns in the intended direction when the control
knob is operated to move the angulation up/down and left/right.
Do NOT Bending
(2)
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(1)