scope LSU VL-7EX II User Manual page 17

C. Image is too dark and/or details of the object aren't seen.
1) If using the 30X or 200X lens, make sure the lights in the lens are on by pressing the
LIGHT/ON button on the scope.
2) If using the 1X lens or looking at a water sample with the 30X or 200X lens, try adding a
lamp or changing the background on which the specimen is placed.
salt on a white background
D. Image appears fuzzy.
1) 1X lens – rotate the black ring to adjust the focus.
2) 30X lens – make sure you are touching the object and that the lens tip is flat against the
object. If that doesn't help, try the using the stand and removing the contact tip, as
described above (in the section "Viewing Without Contact Tip").
3) 200X lens – make sure you are touching the object and rotate the white scalloped ring to
adjust the focus.
E. 30X lens comes apart.
1) Check to make
sure you have all
pieces of the lens.
3) Locate the gray
plastic tip with the
screw threads on it.
Screw it into the
white housing
counterclockwise
until it is screwed in
all the way.
For other problems, contact your vendor or consult the LSU Scope-On-A-Rope Program:
http://www.scopeonarope.lsu.edu.
Handheld Microscope Users Guide
salt on a dark background
2) Take the donut shaped
piece (with the light bulbs
and visible circuitry) and
place it on the base of
the lens, with the lights
facing up (circuitry side
down). Turn it in place
until it fits snuggly into
the base.
4) If the top of the gray
plastic tip is not attached,
simply pop it on.
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