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Home Training Tools Ltd. 2005
Page 4 of 7
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Tension Collar
Note
: with this microscope you will often be
viewing three-dimensional specimens that have
many different levels. You will not be able to
focus on every feature clearly at the same time.
8.
For higher magnification, turn the objective
turret until the 3x or 4x objective clicks in
place and refocus.
Using the Binocular Head
To use the binocular head to the best
advantage, you must set the interpupillary
distance to match the distance between the
pupils of your eyes. You must also adjust the
diopter to compensate for focusing differences
between your two eyes. Each user of the
microscope must make these adjustments for
his or her own eyes. To do so, follow these
steps:
1.
Focus the microscope on a small specimen
in the center of the stage plate.
2.
Focus your eyes on the specimen.
3.
Pull your eyes back from the eyepieces
about 1”. In your peripheral vision you will
see two field view circles overlapping each
other.
4.
Open or close the distance between the
eyepieces by twisting them apart or pushing
them together until the two circles merge
together and appear as one circle. The
interpupillary distance is set correctly when
you see just one field view circle.
5.
Close your left eye and turn the focus knob
until the specimen is in focus for your right
eye.
6.
Close your right eye and bring the specimen
into sharp focus for your left eye by turning
the knurled diopter band on the left
eyepiece. Do not use the focus knob for this
last step – use only the diopter adjustment.
Maintenance
Changing the Top Bulb
If your top microscope bulb burns out,
follow these steps to replace it:
1.
Obtain the correct 10-watt, 12 volt tungsten
replacement bulb (our item MI-BULB5).
2.
Unplug the microscope from the power
supply and allow it to cool before replacing
the bulb.
3.
Lay the microscope carefully on its back or
side.
4.
Pull the old bulb
straight out away
from the socket. If
necessary, unscrew
the silver knob and
remove the bulb
shield.
5.
Insert the prongs of a new bulb into the
socket and press the bulb securely into the
socket.
Changing the Bottom Bulb
If your bottom microscope bulb burns out,
follow these steps to replace it:
1.
Obtain the correct 10-watt, 12 volt tungsten
replacement bulb (our item MI-BULB5).
2.
Unplug your microscope from the power
supply and allow it to cool before replacing
the bulb.
3.
Remove the stage
plate: insert the hex
wrench into the small
hole on the side of the
stage and turn until the
plate can be removed
easily.
4.
Pull the bulb straight out of its socket and
replace with a new one.
5.
Replace the stage plate and secure it in
place with the wrench.
Adjusting Tension
The focus tension is pre-adjusted by the
manufacturer, but if it falls out of adjustment, the
microscope head 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 focus knob
on the left side (when
the stage is facing you).
To adjust the tension, follow these steps:
1.
Insert the small C-wrench into one of the
holes on the collar and turn the collar
clockwise to tighten or counter-clockwise to
loosen.
2.
Tighten only enough to keep the stage from
drifting downward.
