Issue date
：
2020/3/16
－
12
－
4.2 Installation and Adjustment before use
4.2.1Adjusting the balance of second arm
● Hold the second arm, unscrew the star handle fixation screw [3].
● Insert an 8 mm inner hexagon spanner into the screw [2].
● Rotate the screw [2] to adjust the balance of second arm.
● Adjust the second arm, check the balance of second arm in multiple positions.
● Adjust the star handle fixation screw [3] until the upwards and downwards
resistance are almost equivalent.
● When adding or removing accessories, readjustment of the balance of the second
arm is necessary.
Caution
：
The second arm must be held firmly before unscrewing
the star handle fixation screw [3].
4.2.2 Adjusting the microscope
● Carry out this adjustment in your normal working position, switch to 0.3 x
magnification
，
adjust the working distance and pupil distance of the microscope.
● Emmetropes/ operators who do not need corrective glasses
：
adjust the eyepiece to 0.
● Operators using his/her corrective glasses: adjust the eyepiece to 0.
● Ametropes/ operators who need corrective glasses who know their refractive powers
and perform surgery without wearing their glasses
：
adjust the eyepiece to his/her
own eyesight.
● Ametropes/ operators who need corrective glasses, who do not know their refractive
powers and perform surgery without wearing their glasses, use the following
procedure
：
Adjust both eyepieces to +5D
，
take the eyepiece and eyepiece tube
from the microscope, observe a distant object through the eyepiece, just like
using a telescope. Then rotate the diopter adjustment hoop until the image is
clear. If necessary, repeat this process for three times. Use the same method to
adjust the second eyepiece. Assemble the eyepiece and eyepiece tube back to
microscope head, tighten the fixation screw [20].
● Adjust the eye-cover until the whole visual field can be observed. Adjust the
magnification to 3x, when you feel image clear, return to the magnification you
want. The image is still clear when you change the magnification, but different in
