Olympus CHA User manual

OLYMPUS STUDENT MICROSCOPES
IINSTRUCTION MANUAL I
MODELS CBA & CBB

Scanned by J. G. McHone. 8 Nov 09
for personal use only. not for sale
This instruction manual has been prepared for the Olympus Student Microscopes Models
CHA and CHB. It is recommended that you read the manual carefully in order to familiarize
yourself fully with your microscope, in order to obtain optimum performance from this
precision instrument.
IMPORTANT
Observe the following points carefully.
• Operation
1. Always handle the microscope with the care it deserves. and avoid abrupt motions or
any impact.
2. Avoid exposure of the microscope to direct sunlight, dust and vibration.
3. Only use the tension adjustment ring for altering the tension of the coarse adjustment
knobs. Do not twist the two coarse adjustment knobs in the opposite directions
simultaneously, as this will cause damage.
4. Ascertain that the voltage selector switch on the base plate of the Model CHA is set to
conform with the local mains voltage.
5. Disconnect the line cord from the AC power outlet before fuse replacement.
•Maintenance
1. Lenses must always be kept clean. Fine dust on lens surfaces should be blown or
wiped off by means of an air blower or aclean brush. Carefully wipe off oil or finger-
prints deposited
on the lens surfaces with gauze moistened with asmall amount of
xylene, alcohol or ether.
2. Do not use organic solutions to wipe the surfaces of various components. Plastic parts,
especially, should
be cleaned with aneutral detergent.
3. Never disassemble the microscope for repair.
4. The microscope should
be stored in its container immediately after use. If this is not
possible, it should be covered with the vinyl dust cover provided.

I.
Scanned by J. G. McHone. 8 Nov 09
for personal use only. not for sale
CONTENTS
STANDARD EQUIPMENT 2
II. VARIDUS CDMPONENTS OF THE STUDENT MICROSCOPES MODELS CHA &CHB 3
III.
ASSEMBLY 4
IV. IDENTIFICATION AND FUNCTION OF VARIOUS CDMPONENTS 5
V.
OPERATION .
A. Adjustment of Minimum Line Voltage
B. Placing aSpecimen Slide on the Stage
7
C.
Interpupillary Distance and Diopter Adjustments
8
D. Tension Adjustment of Coarse Adjustment I<nabs
E. Automatic Pre·focusing Lever
F. Aperture Iris Diaphragm 9
G. Immersion Objectives
VI. OPTICAL DATA. . .
VII. TROUBLESHOOTING.
@How to put microscope fixing blocks (provided with an optional wooden storage case)
10
10
The blocks should be put at the bottom of the
wooden storage
case in the following order:
1. Insert the screw with the flat washer into
one of lhe two holes (8 mm4>1 as shown
in the drawing.
2.
Turn the screw to gel into the block and
tighten it with the spanner provided or
ascrewdriver.
3. Put the other block in the above order.
Microscope
fixing block
Wooden
storage case
<3
--jl-Bmm¢
Flat washer
I
------
"".w
.____---=.=c.

I. STANDARD EQUIPMENT
Model
CHA-213-W CHB-213-W
Microscope stand with quadruple revolving nosepiece, plain
stage and in-base illuminator (6V lOW halogen) CHA-F-W 1 0
Microscope stand
with quadruple revolving nosepiece, plain
stage and in-base illuminator (20W tungsten) CHB-F-W 01
Binocular observation tube, inclined 45° BH-B 145-W
1 1
Mechanical stage with coaxial right-hand low drive controls CH-MVR 1 1
Abbe condenser CH-CD 1 1
Ach_ 4X
11
Ach_ lOX
1 1
Objectives Ach. S40X. spring-loaded 11
Ach. SlOOX, oil. spring-loaded 1 1
Eyepieces BiWF lOX 22
Lamp socket CH-LSHB 1 0
Halogen light source CH-LSH Halogen bulbs
6V lOW
HALCH
20
Tungsten bulbs 20WCHB 0 3
Spare
fuses O.5A for lOO-110-120V (or O.3A for 220-240V) 2 2
Eyepiece caps 22
Immersion oil, bottled 11
Vinyl dust cover 1 1
•Optional Accessories:
Monocular tube. inclined 45°
Mechanical stage with coaxial left-hand drive controls
Tungsten bulb. 6V lOW for CHA
Wooden storage case
2
CH-M045
CH-MVL
CH-6V lOW- TP
CHA-BIWSC

II. VARIOUS COMPONENTS OF THE STUDENT MICROSCOPES MODELS
CHA&CHB
These models are composed of various components and interchangeable accessories. A
variety
of combinations, standard or optional, is available according to your requirements.
This
is apicture of the Model CHA.
Eyepiece
Revolving nosepiece
Objective
Plain stage
Base
~
a
3
Observation tube
Stand
Mechanical stage
Condenser

III. ASSEMBLY
The picture below illustrates the sequential procedure of assembly. The numbers indicate
the assembly
order of various components.
*Take care at assembly to keep all glass surfaces clean and avoid scratching the lens surfaces.
®Eyepiece cap
knob
of
~'"
Securely attach the mechanical II\. (J) Eyepiece
stage to the plain stage with """>
the clamping screws and tighten ""-
them with acoin. ~ Observation tube
\
®Objective ~ Observation tube
11 !clamping screw
@Mechanical stage
Stand
1
---------~g~~g~O~L-®~9~connect the plug to
Clamping screws ~ th~outlet.
®Condenser ~ ALine cord
t ~~~
®Filter mount ~ Pull down the locking
the lamp house cover.
Aligning the
positioning dots on
condenser
mount and condenser,
insert
the condenser into the
mount from below and clamp
with condenser clamping screw.
Tungsten bulb
20WCHB
IFor CHB I ®::J
Halogen Lamp socket
bulb CH-LSHB
I ForCHA I 0-- Q
IFor CHA I
Tungsten bulb
6V10W
Q:::J
CD After opening the lamp house
cover
at the microscope base,
press the tungsten bulb socket
against the lamp mount, and
rotate clockwise.
* For use of ahalogen bulb, insert
its contact pins into the socket.
*In case of the tungsten bulb, its
silver reflecting surface must
be
positioned pointing to the base
plate.
*Before use, wipe off fingerprints
or stains on the resPective bulbs.
4

IV. IDENTIFICATION AND FUNCTION OF VARIOUS COMPONENTS
Interpupillary distance scale
Mechanical tube length
adjustment ring
Rotate the ring to match your
interpupillary distance setting ob-
tained from the scale. and make
diopter adjustment.
Specimen holder
Low drive coaxial stage con~
trois
Rheostat trimmer screw
Main switch
.... <O'!'! ..............
Observation tube clamping
screw
Loosen the clamping screw slightly
to rotate the observation tube as
desired.
Tension adjustment ring
Coarse adjustment knob
Fine adjustment knob
Graduated in increments of 2.5J.L •
....
Sliding control lever
For continuously variable light
intensitY.
After switching on, if necessary.
rotate this screw with a coin until
the bulb is dimly lit, with the
sliding control switch at minimum
voltage position.
Fuse holder
5
Grounding terminal
Line voltage selector switch
(For CHA) Set the switch to con-
form with the local mains voltage.

Automatic
pre-focusing lever
Condenser height adjustment
knob
The condenser is generally used
at top position. For use with
objectives lOX and lower power,
however, it is recommended to
lower the condenser properly to
eliminate uneven field illumina-
tion.
Aperture iris
diaphragm lever
Filter mount
Slip-in type .
.......... ~\~._._~I_~_-,---:::-F~il~te~r-:.mc:07u~n~t
Accepts 45mm diam. filters.
Lamp mount
Lamp house clamping knob
§iJx~o
6
The lamp house cover can be
opened by pulling down the knob;
or closed by pushing it up until it
snaps in place.
Before pushing, ascertain
that the
knob is positioned as shown in
the picture right, marked with
circle.

Fig. 1
V. OPERATION
•Summary of Putting the Microscope in Operation
1. Match the line voltage selector switch to local mains voltage (for CHAI. (See
page 5,)
2. Switch on the light source.
3. Adjust the trimmer screw. (See page 7.1
4. Place aspecimen slide on the stage. (See page 7.)
5. Loosen the automatic pre-focusing lever.
6. Coarse focus with a low power objective.
7. Make interpupillary and diopter adjustments. ISee page 8.)
8. Swing in the desired objective.
9. Adjust light intensity.
10. Fine focus.
11. Lock the automatic pre-focusing lever. (See page 8.1
12. Adjust the aperture iris diaphragm. ISee page 9.1
A. Adjustment of Minimum Line Voltage (CHA)
The minimum voltage required for the lightsource can be adjusted with the rheostat
trimmer screw at the microscope base plate in accordance with the line voltage and
frequency.
The
built·in rheostat incorporates a thyristor in its semi-conductor circuit for the following
advantages:
(a) Extremely fine adjustment of light intensity can be easily achieved.
(bl Flickering of the bulb filament is eliminated and the light intensity is stabilized.
Icl Increased life expectancy of the bulb.
For adjustment of the minimum line voltage, ascertain
that the voltage selector switch is set to conform with
the local mains voltage, and the sliding control lever CV
is positioned closest to you (low voltage). and then
activate the main switch
CD. If the bulb is dimly lit,
the secondary VOltage is correct. If it is not lit at all,
rotate the rheostat
trimmer screw @gradually with a
coin, until the bulb is dimly lit; then push the sliding
control lever forward in order to obtain optimum light
intensity. (Fig. 1)
8. Placing aSpecimen Slide on the Stage
NOTE: 1) Cover glass: Olympus objectives with an engraving "0.17" are corrected for
use with cover glasses of 0.17mm thickness (No. 1%).
2) Specimen slide: It is recommended to use specimen slides of O.8mm to 1.5mm
thickness.
However,
for use with the immersion darkfield condenser
BH-DCW (optionally availablel. aspecimen slide between
O.8mm to 1.2mmthickness is preferable.
7

C. Interpupillary Distance and Diopter Adjustments (Binocular tube)
(
(
1) Hold the knurled dovetail slides Q) of the right and
left eyepiece tubes with both hands and push the
tubes together,
or pull them apart laterally, which-
ever
is required, while looking through the eyepieces
with both eyes, until perfect binocular vision is
obtained (Fig. 21.
21 Rotate the tube length adjustment ring ® on the
right eyepiece tube
to match your interpupillary
distance setting which you obtained from the scale
@.
3) Look at the image through the right eyepiece with
your right eye and focus on the specimen with the
coarse and
fine adjustment knobs.
Fig.2
4) Next, looking at the image through the left eyepiece with your left eye rotate the tube
length adjustment ring @
to focus on the specimen without using the coarse and fine
adjustment knobs.
D. Tension
Adjustment of Coarse Adjustment Knobs
,
Atension adjustment ring CD is provided next to the
right hand coarse adjustment knob.
With this device the
tension
of the coarse adjustment is freely adjustable for
either heavy or light movement depending on operator
preference. However,
do not loosen the tension adjust-
ment ring
too much, because this may cause thE~ stage to
drop or the fine adjustment knobs to slip.
The
arrow mark indicates increase of the tension.
* Be careful not to rotate the right and left coarse adjust-
ment knobs in the opposite directions simultaneously.
E. Automatic Pre·focusing Lever
This lever
CD is provided to prevent possible contact
between specimen and objective
as well as to simplify
coarse focusing. The lever is locked after coarse focus
has been accomplished. This prevents further upward
travel
of the stage by means of the coarse adjustment
knobs, and automatically provides a
limiting stop
if the stage is lowered and then raised again. The
automatic pre-focusing lever does not restrict fine focus-
ing. (Fig. 4)
8
Fig. 3
Fig.4