Unitron Z645 Series User manual

73 Mall Drive, Commack, NY 11725 • 631-543-2000 (P) • 631-589-6975 (F)
www.unitronusa.com • [e-mail]
Z645 SERIES
ZOOM STEREO MICROSCOPE
MANUAL

Z645 STEREO MICROSCOPE
UNITRON® 73 Mall Drive, Commack, NY 11725 • 631-543-2000 • www.unitronusa.com 2
CONTENTS
SAFETY NOTES .................................................................................................................. 3
CARE AND MAINTENANCE ................................................................................................ 3
INTRODUCTION .................................................................................................................. 4
UNPACKING AND COMPONENTS ..................................................................................... 4
COMPONENTS DIAGRAM .................................................................................................. 4
ASSEMBLY .......................................................................................................................... 5
DETAILED ASSEMBLY PROCEDURE ................................................................................ 6
ADJUSTMENT AND OPERATION
ADJUSTING BINOCULAR VIEWING HEAD................................................................... 8
FOCUS ADJUSTMENT................................................................................................... 9
SPECIFICATIONS.............................................................................................................. 10
TROUBLESHOOTING........................................................................................................ 11
MAINTENANCE.................................................................................................................. 12
SERVICE............................................................................................................................ 12
WARRANTY ....................................................................................................................... 12

Z645 STEREO MICROSCOPE
UNITRON® 73 Mall Drive, Commack, NY 11725 • 631-543-2000 • www.unitronusa.com 3
SAFETY NOTES
1. Open the shipping carton carefully to prevent any accessory, i.e. objectives or eyepieces, from
dropping and being damaged.
2. Keep the instrument out of direct sunlight, high temperature or humidity, and dusty environments.
3. If any specimen solutions or other liquids splash onto the stage, objective or any other component,
disconnect the power cord immediately and wipe up the spillage. Otherwise, the instrument may be
damaged.
4. LAMP REPLACEMENT -- CAUTION: the glass housing of the lamp may be extremely
hot. DO NOT attempt to change the lamp before it is completely cooled or without
wearing adequate skin protection.
5. All electrical connectors (power cord) should be inserted into an electrical surge protector to prevent
damage due to voltage fluctuations.
6. FUSE REPLACEMENT -- For safety when replacing the fuse (ONLY replace with the
same size, type and rating of original fuse), be sure the main switch is in the off position,
disconnect the power cord from outlet, and replace the fuse. Reconnect the power cord
and turn unit on.
7. Confirm that the input voltage indicated on your microscope corresponds to your line voltage. The
use of a different input voltage other than indicated will cause severe damage to the microscope.
NOTE: Always plug the microscope power cord into a suitable grounded electrical outlet.
A grounded 3-wire cord is provided.
CARE AND MAINTENANCE
1. Do not attempt to disassemble any component including eyepieces, objectives or the focusing
assembly.
2. Keep the instrument clean; remove dirt and debris regularly. Accumulated dirt on metal surfaces
should be cleaned with a damp cloth. More persistent dirt should be removed using a mild soap
solution. Do not use organic solvents for cleansing.
3. The outer surface of the optics should be inspected and cleaned periodically using an air bulb. If dirt
remains on the optical surface, use a soft, lint free cloth or cotton swab dampened with a lens
cleaning solution (available at camera stores). All optical lenses should be swabbed using a circular
motion. A small amount of absorbent cotton wound on the end of a tapered stick makes a useful tool
for cleaning recessed optical surfaces. Avoid using an excessive amount of solvents as this may
cause problems with optical coatings or cemented optics or the flowing solvent may pick up grease
making cleaning more difficult.
4. Store the instrument in a cool, dry environment. Cover the microscope with the dust cover when not
in use.
5. UNITRON®microscopes are precision instruments which require periodic servicing to maintain
proper performance and to compensate for normal wear. A regular schedule of preventative
maintenance by qualified service personnel is highly recommended. Your authorized UNITRON®
distributor can arrange for this service.

Z645 STEREO MICROSCOPE
UNITRON® 73 Mall Drive, Commack, NY 11725 • 631-543-2000 • www.unitronusa.com 4
INTRODUCTION
Congratulations on the purchase of your new UNITRON®microscope. UNITRON microscopes are
engineered and manufactured to the highest quality standards. Your microscope will last a lifetime if
used and maintained properly. UNITRON microscopes are carefully assembled, inspected and tested by
our staff of trained technicians in our New York facility. Careful quality control procedures ensure each
microscope is of the highest quality prior to shipment.
UNPACKING AND COMPONENTS
Your microscope arrived packed in a molded shipping carton. Do not discard the carton: the shipping
carton should be retained for reshipment of your microscope if needed. Avoid placing the microscope in
dusty surroundings or in high temperature or humid areas as mold and mildew can form. Carefully
remove the microscope from the shipping carton and place the microscope on a flat, vibration-free
surface.
COMPONENTS DIAGRAM
NOTE: Stand ordered may not be as pictured above.
Trinocular Head
Stand
Focusing Knob
Base
Eyepieces
Lock-screw
Stage Plate
Clip

Z645 STEREO MICROSCOPE
UNITRON® 73 Mall Drive, Commack, NY 11725 • 631-543-2000 • www.unitronusa.com 5
ASSEMBLY
The diagram below shows how to assemble the various modules. The numbers indicate the order of
assembly.
When assembling the microscope, make sure that all parts are free of dust and dirt, and avoid scratching
any parts or touching glass surfaces.
*
Eyepieces
Trinocular Head
(microscope body)
Stand
Lock-screw
Camera Adapter
Digital Camera
Focus Mount

Z645 STEREO MICROSCOPE
UNITRON® 73 Mall Drive, Commack, NY 11725 • 631-543-2000 • www.unitronusa.com 6
DETAILED ASSEMBLY PROCEDURE
Mounting the Binocular Head (Fig. 1)
Loosen the lock screw ③on the focus
mount ④and insert the binocular head and
zoom body assembly ②into the bracket of the
focus mount, then tighten the lock screw ③.
Mounting the Eyepieces (Fig. 1, Fig. 2, Fig. 3)
Remove the eyepiece dust caps ①(Fig. 1) and
gently insert the two adjustable eyepieces ⑤
(Fig. 2) into the eyepiece sleeves until they stop,
as shown in Fig.3. Replace the dust caps when
not in use.
IMPORTANT
ENVIRONMENT REQUIREMENTS
1 Ambient temperature: 0°C to 40°C (32°F
to 104°F)，Maximum R.H：85%。
2 High temperatures and wide swings in
temperature will result in moisture and
mildew and could damage instrument.
3 Avoid placing the instrument in a dusty
environment. When not in use, cover the
microscope with the dust cover.
4 Keep the microscope on a flat and stable
surface.
Fig. 1
Fig. 2
Fig. 3

Z645 STEREO MICROSCOPE
UNITRON® 73 Mall Drive, Commack, NY 11725 • 631-543-2000 • www.unitronusa.com 7
Fig. 6
For Microscopes Purchased
With Illuminated Stands
VOLTAGE CHECK
Confirm that the input voltage indicated on the rear
label of the microscope corresponds to your line
voltage. The use of a different input voltage than
indicated will cause severe damage to your
microscope.
Connecting the Power Cord (Fig. 4)
Turn the power switch ⑥to the off position (O)
before connecting the power cord ⑦.
Insert the power cord plug ⑦into the power jack of
the microscope; make sure the connection is snug.
Plug the power cord ⑧into the power supply
receptacle.
Using the Glass Stage (Fig. 5)
Set the glass stage plate ⑨on the center of the
base, and secure the slide with the two clips ⑩.
Video/Photography Accessories Assembly
and Use (Fig. 6)
Loosen the lock screw ①of trinocular head with an
Allen key and remove the dust cover ②.
Thread the camera adapter ③onto the bottom of
the camera.
Insert the camera adapter ③with camera into the
camera port in the direction shown in Fig. 6, and
tighten the lock screw ①.
Focus on a sample using the eyepieces, the
compare to the live image on the camera software.
If the camera image is out of focus, loosen the
adjustment screw ④on the camera adapter ③,
and move the adjustment screw ④up and down
for focusing, then lock the adjustment screw ④
until the image is clear. (See Fig. 6)
★Rotate the camera tube, to make the camera
display image and the observation image in the
same direction.
Fig. 4
Fig. 5

Z645 STEREO MICROSCOPE
UNITRON® 73 Mall Drive, Commack, NY 11725 • 631-543-2000 • www.unitronusa.com 8
ADJUSTMENT
AND OPERATION
Adjusting Binocular Viewing Head
Adjusting Interpupillary Distance (Fig. 7)
Different users have different interpupillary
distances (this distance is between the centers
of the pupils of each eye). When the operator
changes, it will be necessary to adjust the
interpupillary distance.
While looking through the eyepieces, hold the
left and right eyetubes of the viewing head and
adjust the eyetubes by opening or closing them
until the left and right fields of view coincide
completely and you are able to see a complete
circle.
Adjusting Diopter Ring (Fig. 8)
Set the dioptor rings ②of both eyepieces to “0”
position. (Do this when users change, because
different users will have different diopter
settings.)
Place an easy-to-observe specimen on the
stage plate, i.e., a coin.
Rotate the zoom knob ③to the highest
magnification 5x, then turn the focusing knob ④
to focus the specimen.
Rotate the zoom knob ③to the lowest
magnification 0.8x, looking only into the left
eyepiece, adjust the diopter ring on left eyepiece
to focus the specimen. Then repeat procedure
for the right eyepiece.
NOTE: The working distance (the distance
between the microscope objective to the top of
the specimen) of the microscope is 115mm, the
binocular head bracket ⑤can be mounted onto
higher or lower positions according to your
needs by removing the clamping bolt with the
Allen wrench provided.
Fig. 7
Fig. 8

Z645 STEREO MICROSCOPE
UNITRON® 73 Mall Drive, Commack, NY 11725 • 631-543-2000 • www.unitronusa.com 9
Focus Adjustment
Adjusting the Rotation Tension of the
Focus Adjustment Knob (Fig. 9, Fig. 10)
To adjust tension, hold both left and right focus
adjustment knobs ①with both hands, hold the
left knob (to prevent it from turning), and rotate
the right knob clockwise to increase (tighten) or
counterclockwise to decrease (loosen) the focus
knob tension.
After tension adjustment has been completed,
always rotate both adjustment knobs in the
same direction.
Changing the Magnification
The zooming knobs located on both sides of the
zooming body will change the magnification of
the specimen image.
Total Magnification = Magnification of zoom
body x magnification of eyepiece
(i.e., 0.8 x 10=8x)
NOTE: If using any of the optional auxiliary
objectives, then the above magnification would
be multiplied by auxiliary objective magnification.
(i.e., auxiliary 0.5 x 8=4x)
Moving the Microscope (Fig. 11)
Before moving the microscope, be sure to
remove any slide/samples. When moving the
microscope, hold the stand and base as shown
in Fig. 10 to keep it level.
Fig. 9
Fig. 10
Fig. 11

Z645 STEREO MICROSCOPE
UNITRON® 73 Mall Drive, Commack, NY 11725 • 631-543-2000 • www.unitronusa.com 10
SPECIFICATIONS
Optical System
Greenough optical design; 0.67x – 4.5x zoom range
Viewing Body
45° inclined binocular head with fixed eyepiece tube or trinocular head with
50:50 light split; Ø76mm body; interpupillary distance 52mm - 76mm; click stops
at 0.67, 0.8, 1, 1.2, 1.5, 2, 2.5, 3, 3.5, 4, 4.5; zoom range limits
Eyepieces
WF10x/22mm; WF10x/25mm; WF15x/16mm; WF20x/12.5mm; all with diopter
adjustment
Magnification
6.7x – 45x magnification range with 10x eyepieces and included 1x glass lens
shield
Auxiliary Objectives
1x glass shield (included);
Optional: 0.3x, 0.4x, 0.5x, 0.7x, 1.5x, 2.0x
Working Distance
110mm with included 1x;
With optional auxiliary objectives: 177mm with 0.5x; 120mm with 0.7x; 47mm
with 1.5x
Stands & Illumination
Variety of plain focusing stands, pole stands, diascopic stands, boom stands,
ball bearing boom stands, articulating arms; wide variety of ring lights and fiber
optic illuminators
Camera Adapters
(trinocular model only)
Optional: 0.35x, 0.5x, 0.65x, 1.0x C-mount adapters; photo tube
Digital Cameras
Excelis™ and Teledyne Lumenera® digital cameras

Z645 STEREO MICROSCOPE
UNITRON® 73 Mall Drive, Commack, NY 11725 • 631-543-2000 • www.unitronusa.com 11
OPTICAL DATA
Auxiliary
Objective
Working
Distance
(mm)
EYEPIECE
WF10x/22mm WF15x/16mm WF20x/12.5mm
Magnification
range
FOV (mm)
Magnification
range
FOV (mm)
Magnification
range
FOV (mm)
None or 1.0x
110
6.7x
– 45x
32.8
- 4.8
10.1x
- 67.5x
23.8
- 3.5
13.4x
– 90x 18.6 - 2.7
0.3x
287
2x
- 13.5x
109.3
- 16
3x
- 20.3x
79.3
- 11.6
4x
– 27x 62 – 9
0.4x
217
2.7x
– 18x
82
- 12
4x
– 27x
59.5
- 8.7
5.4x
– 36x 46.5 - 6.7
0.5x
177
3.4x
- 22.5x
65.6
- 9.7
5.1x
- 33.8x
47.7
- 7.1
6.8x
– 45x 37.3 - 5.5
0.75x
120
5x
- 33.8x
43.7
- 6.5
7.5x
- 50.7x
31.8
- 4.7
10x
- 67.6x 24.8 - 3.7
1.5x
47
10.1x
- 67.5x
21.8
- 3.2
15.2x
- 101.3x
15.9
- 2.3
202.2x
– 135x 12.4 - 1.8
2.0x
26
13.4x – 90x
16.4 - 2.4
20.1x – 135x
11.9 - 1.7
26.8x – 180x
9.3 - 1.3
TROUBLESHOOTING
Under certain conditions, performance of this unit may be adversely affected by factors other than
defects. If a problem occurs, please review the following list and take remedial action as needed. If you
cannot solve the problem after checking the entire list, please contact your local dealer for assistance.
Trouble Cause Remedy
Double images Interpupillary distance is not correct Readjust it
Diopter adjustment is not correct Readjust it
Dirt appears in the view field Dirt on the specimen Clean specimen
Dirt on the surfaces of eyepieces Clean eyepieces
Image is not clear Dirt on the surface of objectives Clear objectives
Image is not clear while focusing
change
Diopter adjustment is not correct Readjust diopter
Focusing is not correct Readjust it
The focusing knob is not smooth The focusing knob is too tight Loosen it to a suitable position
The image is obscure because of the
head slipping down during
observation
The focusing knob is to o loosen Tighten it to a suitable position

Z645 STEREO MICROSCOPE
UNITRON® 73 Mall Drive, Commack, NY 11725 • 631-543-2000 • www.unitronusa.com 12
MAINTENANCE
Please remember to never leave the microscope with eyepieces removed and always protect the
microscope with the dust cover when not in use.
SERVICE
UNITRON®microscopes are precision instruments which require periodic servicing to keep them
performing properly and to compensate for normal wear. A regular schedule of preventative maintenance
by qualified service personnel is highly recommended. Your authorized UNITRON distributor can arrange
for this service. Should unexpected problems be experienced with your instrument, proceed as follows:
1. Contact the UNITRON distributor from whom you purchased the microscope. Some
problems can be resolved simply over the telephone.
2. If it is determined that the microscope should be returned to your UNITRON distributor or to UNITRON
for warranty repair, pack the instrument in its original Styrofoam shipping carton. If you no longer have
this carton, pack the microscope in a crush-resistant carton with a minimum of three inches of a shock
absorbing material surrounding it to prevent in-transit damage. The microscope should be wrapped in a
plastic bag to prevent Styrofoam dust from damaging the microscope. Always ship the microscope in an
upright position; NEVER SHIP A MICROSCOPE ON ITS SIDE. The microscope or component should be
shipped prepaid and insured.
LIMITED MICROSCOPE WARRANTY
This microscope is warranted to be free from defects in material and workmanship for a period of five (5) years for
mechanical and optical components and one (1) year for electrical components from the date of invoice to the
original (end user) purchaser. This warranty does not cover damage caused in-transit, misuse, neglect, abuse or
damage resulting from improper servicing or modification by other than UNITRON approved service personnel.
This warranty does not cover any routine maintenance work or any other work, which is reasonably expected to be
performed by the purchaser. Normal wear is excluded from this warranty. No responsibility is assumed for
unsatisfactory operating performance due to environmental conditions such as humidity, dust, corrosive chemicals,
deposition of oil or other foreign matter, spillage or other conditions beyond the control of Unitron Ltd. This
warranty expressly excludes any liability by Unitron Ltd. for consequential loss or damage on any grounds, such as
(but not limited to) the non-availability to the End User of the product(s) under warranty or the need to repair work
processes. Should any defect in material, workmanship or electronic component occur under this warranty contact
your UNITRON distributor or UNITRON at [phone]. This warranty is limited to the continental United States
of America. All items returned for warranty repair must be sent freight prepaid and insured to Unitron Ltd., 73 Mall
Drive, Commack, NY 11725 – USA. All warranty repairs will be returned freight prepaid to any destination within
the continental United States of America. For all foreign warranty repairs, return freight charges are the
responsibility of the individual/company who returned the merchandise for repair.