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Locking nut
Stop screw
Tension collar
pressure on the stage. This will allow you to
scan a slide while maintaining fairly good
focus.
Filters
The MI-4100DXL model comes with a blue
filter that can be placed in
the filter holder located
below the iris diaphragm.
The filter absorbs some of
the light from the
illuminator and makes the
light slightly blue. In some
cases this may enhance the image of your
specimen, though generally it is not necessary.
Use the following procedure to insert the filter:
1.
Locate the tiny filter holder knob underneath
the iris diaphragm. Use this to swing the
filter holder out from under the diaphragm.
2.
Place the filter in the holder and swing back
into place.
3.
Adjust focus and diaphragm normally.
Maintenance
Adjusting the Stage Stop
The stage stop is set at the factory to insure
that the stage cannot come up far enough to hit
the objective lenses. In normal circumstances
you will not have to adjust this. However, if it
falls out of adjustment or you are using a thinner
slide that cannot be focused, follow these steps:
1.
Loosen the round
knurled locking
nut by turning it
counter-clockwise.
You may need to
use needle-nose
pliers for this.
2.
Loosen the stop
screw.
3.
Focus on a standard slide until you obtain a
sharp image.
4.
Tighten the stop screw by turning it
clockwise until it stops, and then turn it back
half a turn.
5.
Lock into position by tightening the locking
nut.
6.
Note: The higher the stop screw is, the
higher the stage will rise.
Changing the Bulb
Your microscope bulb should last for
years—approximately 8,000 hours. When it
burns out, follow these steps for replacing it:
1.
Obtain the correct 5-watt fluorescent
replacement bulb (our item MI-BULB4. Note:
some other 5-watt fluorescent bulbs may be
too big).
2.
Unplug your microscope from the power
supply and allow it to cool before replacing
the bulb.
3.
Carefully lay the microscope on its side.
4.
Using a screwdriver,
remove the screw from the
center of each rubber foot.
5.
Remove the perforated
metal plate and gently pull
the bulb straight out from
the socket.
6.
Replace with a new bulb,
then put the perforated
metal plate back in place
and replace the rubber feet.
Adjusting Tension
Coarse focus tension is pre-adjusted by the
manufacturer, but if
it falls out of
adjustment, the
stage will drift down
under its own weight
and the image will
move out of focus.
The tension adjustment collar is located
between the microscope arm and the coarse
focus knob on the right side (when the stage is
facing you). To adjust the tension, follow these
steps.
1.
To tighten tension, turn the collar clockwise
(you can get a better grip by putting a wide
rubber band around the collar).
2.
Tighten only enough to keep the stage from
drifting downward.
