Optika Italy IM-3 Serie Manual De Instrucciones página 32

II. Mechanical Section:
The coarse focus knob is hard to turn.
The focus is unstable.
III. Electric section
The LED doesn't turn on.
The brightness is not enough
The light blinks
IV. Viewing tube assembly
The field of view of the two eyes is dif-
ferent
V. Microphotography and video
The image is unfocused
The edge of the image is unfocussed
Bright patches appear on the image
The tension adjustment collar is too
tight
The tension adjustment collar is too
loose
No power supply
The brightness adjustment is low
The power cord is poorly connected
The interpupillar distance is not correct Adjust the interpupillar distance
The dioptric correction is not right
The viewing technique is not correct,
and the operator is straining the eye-
sight
Incorrect focussing
To some degree, it is inherent to the
nature of achromatic objectives
Stray light is entering the microscope
through the eyepieces and through the
camera viewfinder
Page 32
Loosen the tension adjustment collar
Tighten the tension adjustment collar
Check the power cord connection
Adjust the brightness
Check the power cord
Adjust the dioptric correction
When look into the objective, do not
stare at the specimen but look at the
whole field of view. Periodically, move
the eyes away to look at a distant ob-
ject, then back into the objective
Adjusting the focus system as in the
present manual
The problem can be minimized by a
correct setting of the aperture dia-
phragm
Cover the eyepieces and the viewfind-
er with a dark cloth