Magnus Theia fi User manual

BIOLOGICAL MICROSCOPE
This instruction manual is for the Magnus Biological Microscope Model to ensure the
safety,obtain optimum performance, and familiarize yourself fully with the use of this microscope,
we recommend you study this manual thoroughly before operating the microscope. Retain this
instruction manual in an easily accessible place near the work desk for future reference.
*Theia fi is also known as MLX Plus in certain regions
*

1. Before replacing the lamp bulb, be sure to set the
main switch to (OFF), unplug the power cord from the
power outlet and wait until the lamp and its
surroundings have cooled down fully. (Fig. 2)
2. Before replacing fuse F 250V/2A be sure that the
1
main switch is OFF. Unscrew the holder cap to
replace the fuse.
(Figs. 1 & 2)
Applicable lamp bulb 6V20WHAL
Fig. 2
Fig. 1
Be sure to read and
observe the caution
and notes in this
section. Otherwise
injury or damage to
the instrument may
result.
SAFETY PRECAUTIONS
2
3
1
!
1
Fuse

3. Place the microscope on a flat, level surface which
does not block the ventilation opening on the bottom.
Do not place the microscope on a soft surface into
which it may sink, for this will block the ventilation
opening on the bottom and may lead to a fire hazard.
Also, do not place the microscope near an object
which may impede switching of the main switch on
and off.
4. Be sure to use the power cord provided with the
microscope. We cannot warrant the safety and
performance of the microscope unless the provided
power cord is used.
5. Be sure to earth the microscope to avoid damage in
an emergency.
6. Never insert a thin object like a wire into the
ventilation opening on the bottom. Otherwise an
electric shock or malfunction will result.
7. Before placing the dust cover on the microscope,
wait until the lamp and its surroundings have cooled
down fully, and unplug the power cord from the power
outlet.
IMPORTANT

Warning Label
A warning indication label is attached to every part which should be handled or oper-
ated with special care. Be sure to observe the indications.
Warning indication position Inside of the base (Warning against high temperature)
If the warning label is stained or peeled off, please contact your local Magnus repre-
sentative for replacement or other inquiry.
Safety Symbols
The following symbols are found on the microscope. Study the meaning of the symbols, and
always use the equipment in the safest possible manner.
O
Indicates that the surface becomes hot, and should not be
touched with bare hands.
Before use, carefully read the instruction manual. Improper
use could result in personal injury to the user and/or damage to
the equipment.
Indicates that the main Electrical Hazard.
Indicates that the main switch is ON.
!
Indicates that the Fuse of 250V/2A, rear of the microscope
FUSE

1. A microscope is a precision instrument. Handle it
carefully, taking care not to hit it against an object.
Do not disassemble the microscope or drop its lens on
the floor, for this makes accurate observation
impossible.
2. Avoid using the microscope in places where there is
direct sunlight, high temperature, high humidity, dust or
vibration.
(For the operating environment condition, see “SPECI-
FICATIONS” on page 17.)
3. Be sure to use the tension adjustment ring when
adjusting the tension of the coarse focus adjustment
knob (see page 16).
No high temperature or humidity!
1. Clean all glass components by wiping gently with
gauze. To remove fingerprints or oil smudges, wipe
with gauze slightly moistened with a mixture of ether
(70%) and alcohol (30%)

! Since solvents such as ether, alcohol are highly
flammable, they must be handled carefully. Be
sure to keep these chemicals away from open
flames or potential sources of electrical sparks -
for example, electrical equipment that is being
switched off. Also remember to always use
these chemicals only in a well-ventilated room.
2. When cleaning parts other than the lenses, do not
use the above chemicals. If they are seriously dirty,
wipe with gauze moistened slightly with a solution of
neutral detergent.
3. Never attempt to remove parts other than those
specified from the microscope for cleaning.
4. When the microscope is not used, ensure that the
light source lamp is cool, cover the microscope with
a dust cover or put it in a wood case, and store in a
dry place.
5. To clean the condenser, fully loosen the securing
knob , then remove the condenser by lowering it
with the condenser up-down movement knob , and
clean the upper lens of the condenser.
The lens can be cleaned using the same method as
described in Fig.3. Wipe it as lightly as possible.
Reverse the removal procedure to attach the con-
denser.
Fig.3
1
2
1

To carry the microscope, hold around the arm with
hand as shown in Fig. 4 and carry carefully.
Do not hold the microscope by the stage ‚ or
observation tube . Also be careful not to drop
the eyepiece and specimen .(Fig.5)
If the microscope is used in a way not specified by this
manual, the safety of the user may be imperiled, and
the equipment may be damaged. Always operate the
microscope as outlined in this instruction manual.
The warning, caution and other notes in this manual
use the following symbols.
Fig. 4
Fig. 5
2
3
4
5
: Warning to prevent injury to the user or damage
to the product.
: Caution for preventing damage to the product.
: Reference note or remark (convenient informa
tion for operation and/or maintenance)
5
2
4
3

COMPONENT UNITS 1
FUNCTION OF EACH PART 2
ASSEMBLY 3
OBSERVATION FLOW 9
OPERATION PROCEDURE 10
Turning the Lamp ON........................ 10
Placing Specimen on the Stage......... 10
Focusing........................................... 12
Adjusting the Interpupillar Distance. 13
Adjusting the Diopter......................... 14
Adjusting the Condenser Position
and Iris Diaphragm............................ 14
Varying the Magnification.................. 15
Adjusting the Tension of the Coarse
FocusAdjustment Knob.................... 16
Locking of the prefocusing lever.........16
SPECIFICATIONS 17
TROUBLESHOOTING GUIDE 20

These units constitute
your microscope
* These parts are fixed and should not be removed from the microscope frame.
Observation tube
( A 4 5 d e g r e e t u b e ,
trinocular tube or binocular
tube is provided, depending
on the composition of your
mi-croscope.)
Mechanical stage*
Objective
This lens is used to mag-
nify a specimen image. The
higher the magnification
number of an objective, the
greater the detail seen in
specimen parts.
Microscope frame
C o - a x i a l l o w d r i v e
mechanical stage (125mm
x145mm) (+/- 5mm) with
traverse area of 50mm x
75mm (+/- 5mm) is provided
M i c r o s c o p e f r a m e
ergonomic & compact
d e s i g n f o r u s e r
convenience.
Eyepiece lenses
Observe specimens by
looking through the eye-
p i e c e l e n s e s w h i c h
magnify the image formed
by an objective.
Revolving nosepiece*
Objectives are mounted on
this part. Rotating this part
easily changes magnifica-
tion.
Stage*
The specimen is placed
here.
Condenser
This incorporates lenses
which collect illumination
light on the stage so that
the objectives can perform
at full capability.

Interpupillar distance scale
Interpupillar distance ad-
justment seat
Specimen
Ver tical feed knob
Rotate to move the specimen
glass plate in the vertical
direction.
Horizontal feed knob
Rotate to move the specimen
glass plate in the horizontal
direction.
The description on this page uses the binocular tube composition using the Theia-Fi, as
an example.
Diopter adjustment ring
Rotate to compensate for
observer’s eyesight.
Specimen holder
The specimen glass plate
is fixed here.
Cover glass
Glass Slide

Refer to following pages for the detailed assembly diagram of each unit. The following figure
shows the outline of assembly and the order of assembly steps.
To ensure accurate
observation be care-
ful not to drop the
objective or eye-
piece. Be very cau-
tious in assembly.
Overall Assembly Diagram
Power Cord
Eyepiece lenses
HWF10X
Objectives
Daylight filter
Microscope
Option (1) 6V20W halogen light source coupled with an efficient aspheric lens system & koehler
(Optional) to provide optimum brightness along the optical path, Option (2) LED (LED light
source high brightness, longlife (30,000hrs) Option (3) LED with battery back-up (LED light
source high brightness, longlife (30,000hrs) with battery back-up in-built NiMH rechargeable
batteries provide 6 to 8 hrs back-up on full charge)
Built-in Illumination base
Option for LED illuminator
(with or without battery back-up)
and with AC adapter.

Power Cord
Socket

Slide the Light case (which is Front open) for easy
bulb change
Power Cord
Socket Switch
Switch off the power supply and unplug the power
cord.
. See page (1)

1. Remove the eyepiece cap . (Fig.10)
2. Insert the eyepiece lens‚ into the observation tube.
(Fig. 10)
3. When the observation tube is binocular, attach the
other eyepiece lens in the same way as above.
- Do not tilt the microscope while eyepiece lenses are
attached. Otherwise the eyepiece lenses may drop.
- Do not insert anything other than eyepiece lenses into
the observation tube for it contains optical com-
ponents.
Fig. 10
1
2

1. ,, Attach each objective‚ to each lens mount hole
of the revolving nosepiece, starting from the lowest-
magnification objective and increasing the magnifi-
cation in the clockwise direction seen from the bot-
tom.
By attaching objectives in this way, the objectives
can be switched in ascending order of magnification.
Do not damage, destroy, process, excessively
bend, pull, twist, bundle, place a heavy object on
or pinch a power cord. Otherwise the cord may
become worn, causing an electrical shock or fire
hazard.
Always use the power cord provided with the mi-
croscope.
Fig. 12
!
2
1
Lower
Magnification
Higher
Magnification

4
5
2. Plug the power cord plug „ into a wall outlet . (Fig. 14)
Connect the power cord correctly and make sure that
the earth terminal of the power supply and that of the
wall outlet are properly connected. If the equip- ment
is not earthed, Magnus can no longer warrant the
electrical safety and performance of the equip-ment.
To prevent an electric shock, set the main switch
to (OFF) before plugging the power cord. (Fig. 13)
1. Insert the connector‚ of the power cord into the
connector ƒ securely. (Fig.13)
..
Fig. 13
Fig. 14
45
1
2
3
!
12
3

Observation (Engaging the desired objective in the light path, adjusting
the brightness and focusing)
Turning the Lamp ON Page 10
Placing Specimen on the Stage Page 10
Engaging the 10X Objective in the Light Path Page 12
Focusing Page 12
Adjusting the Condenser Position Page 14
Adjusting the Diopter Page 14
With a binocular tube :
Adjusting the Interpupillar
Distance Page 13
With a binocular tube :
Once you have under
stood the detailed op-
eration procedur e on
the following pages, you
will be able to operate
the microscope simply
by referring to the chart
on this page.

Repeated ON and OFF of the main switch may cause
malfunction.
1. Set the main switch to “O” (ON).
2. Adjust the brightness by rotating the brightness
adjustment knob .
Rotating the knob in the direction of the arrow
increases brightness and rotating it in the opposite
direction decreases brightness. ( )
Fig. 15
Fig. 16
1
2
3
4
5
2
1
2
Set the specimen’s glass plate carefully. Be careful
not to damage the glass slide edges by returning
the bow-shaped lever violently or releasing the
bow-shaped lever knob in the middle of operation.
1. Fully lower the stage by rotating the coarse focus
adjustment knob‚ in the direction of the arrow.
2. Open the bow-shaped lever outward, place the
specimen glass plate ƒ , gently return and fix the bow-
shaped lever to the original position.
11
2
1
3

Glass (Fig. 17)
This should be a transparent, colorless glass plate
with a length of 76 mm, width of 26 mm and thick-
ness between 0.8 and 1.4 mm.
The recommended thickness is between 0.9 and 1.2
mm.
Slide
3. Rotating the upper knob which is the vertical feed
knob moves the specimen glass plate in the front-
rear direction; rotating the lower knob which is the
horizontal feed knob …moves it in the lateral direc-
tion. While watching the specimen move the speci-
men, to the desired position.
Cover glass (Fig. 17)
This is the glass plate placed on the specimen and
should have a thickness of 0.17 mm. Dimensions
of 18 x 18 mm or 18 x 24 mm are most suitable for
ease of observation.
Fig. 17
4
5

1. Rotate the revolving nosepiece so that the 10X
objective comes above the specimen.
Here, we use the 10X objective because it makes
focusing easiest.
2. While looking at the microscope from the side, rotate
the coarse focus adjustment knob to approach the
specimen until it is as close as possible to the
objective.
3. While observing the specimen through the eyepiece
lenses, lower the stage by slowly rotating the coarse
focus adjusment knob and, when coarse focusing is
obtained, adjust to precise focus by rotating the fine
focus adjustment knob ‚.
The following table shows the distance between
the objective and specimen (“A” in Fig. 18) when
precise focus is obtained.
Fig. 18
29.0 6.30 0.6
mm Mm mm
1
2
1
1
2
0.16
mm
100x
A