EXM-150 MICROSCOPE SERIES
ACCU-SCOPE
®
8
ADJUSTMENT & OPERATION
(continued)
Model With Iris Diagphragm
Model With Disc Diaphragm
Using the Disc or Iris Diaphragm
Each EXM-150 Series Microscope is supplied with either a
disc or iris diaphragm, depending on the model ordered.
The amount of light can be adjusted by opening or closing the
iris diaphragm (using the lever
①
) or by turning the disc
diaphragm
②
, located just beneath the stage).
Adjust the diaphragm to the smallest size allowable for a clear,
sharp image of the specimen.
Using the 100xR Oil Objective
(EXM-151 Models ONLY)
The procedure for examining a specimen using an oil
immersion objective is as follows:
Rotate the nosepiece so the low power objective is in the
optical path.
Place one drop of immersion oil on the lighted area of the
specimen slide
③
.
Rotate the nosepiece so the 100xR oil immersion objective is
in the light path. Dust or air bubbles in the oil can destroy the
definition of the image. If the bubbles are trapped between
the objective lens and the slide, clean off the oil and start
again or try to eliminate the bubble by rotating the objective
back and forth.
With your eye at the level of the stage, use the coarse focus
knob to raise the stage with the specimen cover glass. When
you see a flash of light at this location the objective lens has
made contact with the immersion oil and the microscope can
now be focused using the fine focus knob.
IMPORTANT NOTE
Each time you finish using the oil immersion objective wipe off
all traces of oil from the objective and the specimen cover
glass with a lens tissue or clean soft cloth.
Cleaning after each use will prevent oil from contaminating the
high dry objective (40xR), prevent dust and dirt from accu-
mulating on the lens of the objective which will degrade its
optical performance, and will keep the slide clean to work with
.
①
②
③
