Swift SM91 User manual

Swift SM90,M28Z,M29TZ Series
Stereo Microscope
Use and Care Manual
SWIFT OPTICAL Enduring Quality and Technical Excellence.

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SWIFT SM90 SERIES STEREO MICROSCOPE
The Swift SM90 Series stereo microscope is a full size, well-
balanced, stereoscopic instrument producing an erect, three-
dimensional image with a large, comfortable field of view. The
SM90 Series features a modular design which allows the use of other
Swift modular heads to provide maximum versatility of the
instrument for classroom use. It is built to the highest, most rigid
optical and mechanical standards.
SWIFT M28Z / M29TZ ZOOM STEREO MICROSCOPES
The Swift M28Z / M29TZ zoom stereo microscope is ideal for
laboratory, industrial and educational use. The M28Z /M29TZ is
designed to produce a crisp image (erect) with a generous field of
view and an excellent depth of focus. It features zoom objectives
with continuous magnification ranges from 10X to 40X which is not
possible with a fixed power stereo microscope.

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SM90 SERIES STEREO MICROSCOPE SPECIFICATIONS
Model Number
SM91
SM95
SM98
Objectives
1X, 2X
1X, 3X
2X, 4X
Eyepieces
W10X, FN23
W10X, FN23
W10X, FN23
Total
Magnification/
Field of View
10X / 23mm
20X / 11.5mm 10X / 23mm 30X / 7.67mm 20X / 11.5mm 40X / 5.75mm
Working
Distance 80mm 80mm 80mm
Stand
SM90CL
SM90CL
SM90CL
SM90CL
Illuminator
(incident &
transbase)
3W, 5500K LED 3W, 5500K LED 3W, 5500K LED
M28Z/M29TZ STEREO ZOOM MICROSCOPE SPECIFICATIONS
Model Number
M28Z
M29TZ
Objectives 1X - 4X 1X - 4X
Eyepieces W10X, FN23 W10X, FN23
Total Magnification/
Field of View
10X – 40X /
23mm – 5.75mm
10X – 40X /
23mm – 5.75mm
Working Distance 80mm 80mm
Stand SM90CL SM90CL
SM90CL Illuminator
(incident & transmitted) 3W, 5500K LED 3W, 5500K LED

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Eyepiece Tube
Head
Top (incident)
Illuminator
Focusing
Control Knob
Illuminator
On/Off
Switches
Illuminator Dimmer
Control
Turret
Stage Clip
Stage Plate
Stand
(SM91-SM90CL Pictured)
Diopter
Adjustment
Bottom
(transmitted)
Illuminator
Eyepiece

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(M28Z-SM90CL pictured)
Magnification Knob
Diopter
Adjustment

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COMPONENTS OF THE STEREO MICROSCOPE
BOTTOM ILLUMINATOR – The light source that is mounted in the
base to provide trans-illumination.
DIOPTER ADJUSTMENT – Located on the left eyepiece tube (SM90)
or left and right eye tubes (M28Z/M29TZ). This adjustment is used
to fine focus the optics to compensate for visual differences
between the user’s eyes.
EYEPIECE – The upper optical element that further magnifies the
primary image of the specimen and brings the light rays in focus at
the eyepoint.
EYEPIECE TUBE – The part of the head that holds the eyepieces in
place. Set screws in the eyepiece tubes can be used to lock the
eyepieces in place.
STAGE CLIP – Used to hold specimen in place.
FOCUSING CONTROL KNOB – The focusing control knobs located on
either side of the stand are used to raise or lower the head to bring
the specimen into focus. The control knobs incorporate a slip
clutch system which prevents the head from traveling past both
ends of the focusing range. When the focusing limit is reached, the
clutch system begins to slip to prevent gear damage.
HEAD – The 360˚ rotatable component that contains all of the
optical elements of the stereo microscope including the eyepieces,
refracting prisms and objective lenses. The head of the SM90 series
and M28Z / M29TZ is designed to allow users to adjust the
interpupillary distance of the eyepieces for proper viewing.
ILLUMINATOR DIMMER CONTROL – The intensity of the top
(incident light) LED or bottom (trans-illumination) LED can be
adjusted to the preferred brightness (0 through 9) by using the
dimmer control located on the side of the base.
ILLUMINATOR ON/OFF SWITCHES – A tri-illumination system is
incorporated into the stand. The illumination system is controlled
by top (incident light) and bottom (trans-illumination) on/off
switches located at the base of the stand. The incident illuminator
is used for opaque specimens, while the trans-illuminator
effectively illuminates the internal structure of transparent
specimens. Translucent specimens may be seen in greater detail if
both illuminators are used simultaneously.

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MAGNIFICATION KNOB – Used to change the M28Z and M29TZ
magnification settings.
STAGE PLATE – Opaque and black and white stage plates are
provided with the microscope stand. The opaque stage plate allows
light from the bottom illuminator to pass through. The black and
white stage plates can be used for additional contrast to the
specimen that is being viewed.
STAND – Used to support the stereo microscope head. The height is
adjustable which allows the head to change its focusing range. The
stand also contains the top and bottom Illuminators.
TOP ILLUMINATOR – The round-shaped housing which contains a
light source that can be adjusted up or down to illuminate the
desired spot on the stage plate.
TURRET – The round barrel that houses the objective lenses. The
SM90 Series has two magnifications that can be changed by rotating
the turret to a different set of objective lenses.
OPERATING YOUR SM90 SERIES STEREO MICROSCOPE
1. Place the specimen onto the stage plate and select the type of
illumination. If the specimen is transparent, turn on the bottom
illumination. If the specimen is opaque, turn on the top
illuminator.
2. The SM90 is equipped with two built-in magnifications. To
change magnifications, rotate the turret one direction or to the
other as far as it will move. This will place one pair of
objectives in alignment for viewing. The power that is in use is
marked on the objective barrel.
3. Look through the eyepieces and rotate the focus control knob to
focus the specimen in the field of view.
4. Grasp the eyepiece tubes and move them either closer together
or farther apart, to see one clear image. Note, if two separate
images are observed, the eyepiece tubes are too far apart and
should be moved together. If two overlapping images are seen,
the eyepiece tubes are too close together and should be moved
apart.
5. Close your left eye and adjust the focus controls so the image is
in sharp focus, while viewing with the right eye only.
6. Close your right eye and while viewing with the left eye

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only, adjust the diopter ring on the left eyetube to bring the
image of the specimen into sharp focus. The optical system is
now adjusted to your particular vision.
7. Rotate the turret to switch to another magnification if
necessary. Minor focusing using the focusing control knob may
be required.
OPERATING YOUR M28Z / M29TZ SERIES
STEREO ZOOM MICROSCOPE
1. Place the specimen onto the stage plate and select the type of
illumination. If the specimen is transparent, turn on the bottom
illumination. If the specimen is opaque, turn on the top
illuminator.
2. Turn the diopter adjustments (on the eyepiece tubes) until the
rotatable diopter tube touches the silver line on the eyepiece
tubes.
3. Grasp the eyepiece tubes and move them either closer together
or farther apart, to see one clear image. Note, if two separate
images are observed, the eyepiece tubes are too far apart and
should be moved together. If two overlapping images are seen,
the eyepiece tubes are too close together and should be moved
apart.
4. Rotate the magnification knob to 4.0X (zoom in). Now adjust
the focus with the focusing control knob.
5. Rotate the magnification knob (zoom out) to 1.0X and focus
each eye (one after the other) with only using the diopter
adjustments. (This may be achieved by closing one eye while
the other is being adjusted).
6. Repeat adjustments 4 and 5 if further focus is required.
7. Once the diopter adjustment has been made for each eye, the
user can operate the focusing knobs on the microscope stand to
get new specimens into focus.

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SERVICE
Use and store your instrument in a dry environment. When not in
use, microscopes should be stored with dust covers in place and
illuminators turned off. Avoid direct sunlight, high temperatures,
moisture, smoke, and fungus.
Your Swift stereo microscope is designed to function satisfactorily
with only ordinary maintenance. The instrument should be
periodically serviced by a qualified, authorized service technician,
who will clean, re-lubricate and perform routine adjustments.
Unauthorized personnel should never disassemble lens assemblies or
other precision components. For information regarding service,
contact your local authorized Swift dealer or Swift customer service
at [phone].
BULB REPLACEMENT
Unplug the stereo microscope from the electrical outlet and
remove specimens from the stage before you attempt to replace
a LED. To prolong the life of the LED, you should always turn off the
unit when not in use.
The top illuminator bulb is Swift #MA14778, 3W, 5500K LED bulb.
The top bulb may be replaced by carefully laying your microscope
on its back so that the top light is facing up. Unscrew the top light
cover to expose the LED bulb assembly. Carefully remove the LED
condenser lens to gain access to the two Philips screws holding LED
bulb down, and remove them. Approximately 1” below the LED
bulb assembly on the outside of the top light barrel are three
1.27mm hex head set screws. Loosen all three set screws and
detach the LED wiring harness within the barrel. Remove the old
LED bulb assembly, attach the new LED bulb assembly and assemble
in the reverse.
The transmitted (bottom) illumination bulb is Swift #MA14778, 3W,
5500K LED bulb. The bottom bulb may be replaced by carefully
laying your stereoscope on its side and using a Phillips screw driver
remove the four screws securing the rubber feet and base plate to
illuminator base. Remove three 3mm Phillips head screws securing
lamp housing to lamp bracket; then remove lamp housing. Using a
5.5mm hex nut driver, remove two nuts securing the 3W LED lamp
assembly. Carefully unplug LED lamp connector (attached to LED
socket located on circuit board). Replace LED lamp assembly and
then, reverse the above process.

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TENSION CONTROL OF FOCUSING MOVEMENT
The focus tension is easily adjusted by using the Swift adjustment
wrench. This wrench fits the tension collar found on the focusing
controls, between the knob and upright support. A clockwise turn
of this collar moves it toward the upright support and increases
tension, while a counter clockwise turn moves the collar toward the
knob and decreases tension (see illustration).
CLEANING
Eyepieces should be cleaned as often as necessary to allow
unobstructed viewing. Clean the eyepieces by brushing away dust
particles using a soft camel hair brush or with air pressure, then
moistening the lens by breathing onto it. Wipe the lens carefully
with quality lens tissue. If dirt or other foreign matter still remains,
it may be necessary to use water or optical cleaner (eyeglass or
camera lens). Note: the lens tissue should be moistened, not
saturated, for cleaning, after which the lens should be dried using a
quality lens tissue. Painted surfaces should be cleaned with soapy
water or mild non-abrasive cleaners and a soft cloth. Do not use
solvents on painted surfaces.
COMMON PROBLEMS IN MICROSCOPY
If you have a problem, you may be able to correct it yourself. Here
are a few common problems and easy solutions you may want to try
before calling for service.
CAUTION – Never disassemble mechanical or optical components.
This servicing should only be done by an authorized Swift technician.
The Limited Lifetime Warranty will be null and void if the
mechanical or optical components are disassembled by a non-Swift
dealer.