VWR International, LLC., Stereo Zoom Microscope
6
b. If using the frosted glass plate, insert the blue filter into the centre of the base, with the frosted
surface facing down.
c. Place the glass plate on top, again, with the frosted surface facing down.
d. Re-tighten the locking set screw.
2. Before using the stereomicroscope, adjust the light intensity control to minimum position. This
should be repeated every time the stereomicroscope is switched on or off to prolong the use of the
bulb. (Intensity control not available for models with the 2LBB base).
Three light switches are situated on the stereomicroscope base.
MAIN :
Turns the entire unit on or off.
I
:
Turns incident light on or off. (Top illumination)
T
:
Turns transmitted light on or off. (Bottom illumination)
3. Press the main switch to position
“I”
.
4. Press the incident or transmitted illumination switch, or both at once, to position
“I”
or
“II”
, according
to necessities in examining the sample.
5. Light intensity should be adjusted according to the objectives utilised, or the type of sample
observed.
6. The angle of the incident illumination can be adjusted using the screw that permits variation on the
orientation of the illuminator lenses.
7. If the stereomicroscope does not work, please check the “Troubleshooting” section of this manual.
B. Interpupillary Adjustment
1. Whilst looking through both eyepieces, move eyepiece tubes on their axis, holding head by the
eyepiece tubes housing the prisms.
2. When a full field of view is obtained, and converted into a single image, interpupillary distance is
correct for your eyes.
3. Each user should adjust interpupillary distance to match their eyesight.
C. Focusing
1. Turn objective turret so that the lowest magnification number 2X is facing the front of the
microscope,
lined up with the eyepiece, and the 4X magnification is located at the two sides, perpendicular to the
eyepiece. The turret permits a ¼ turn. Ensure that turret is “clicked” into its correct position.
NB:
For models with N3GG or 2LBB bases, omit steps 2, 3 and 4, passing directly to 5.
2. Place a flat object, or a specimen slide on the centre of the stage.
