Using The Microscope - VWR VisiScope STB250 Manuel D'utilisation

Using the microscope

1. Place the specimen on the stage
Place the specimen on the microscope
stage and lock the specimen using the
slide-clamp if it is necessary. Ensure that
the specimen is centred over the stage
opening. (Fig.3)
2. Turn on the light
The microscope comes with an electrical
illuminator. Insert the plug of the cable into
the power socket and turn on the switch on
the main body and select your light source.
(Fig.4) Turn the light intensity control to a
brightness suitable for observation. (Fig.5)
3. Adjust interpupillary distance
Hold the right and left parts of the
observation head by both hands and
adjust the interpupillary distance by
turning the two parts until one circle of
light can be seen. If two circles appear,
the interpupillary distance is too big, and
if two overlapped circles appear, the
interpupillary distance is too small. (Fig.6)
4. Focus
Rotate the focusing knob to bring the
sample into focus with the highest
magnification. (Fig.7)
5. Dioptric compensation
This compensation makes it possible
for people with glasses to adjust the
microscope to their eyes and use the
microscope without glasses. Turn the
zoom down to the lowest magnification.
Adjust the diopter compensation ring of the
right eyepiece tube until the image of the
right eyepiece is clear and sharp. Repeat
the procedure for the left eyepiece. Then,
check the focus of the image for the whole
zoom range. It should now be perfectly
parfocal (focus is always maintained during
the change of magnification). (Fig.8)
Fig.4
7
Fig.3
Fig.5
Fig.6
Fig.7
Fig.8