HOZAN L-51 User manual

１
L-51
Thank you for purchasing the HOZAN L-51 STEREO MICROSCOPE. With proper care
and handling, this fine instrument will provide years of trouble-free operation. Please read
this entire instruction manual carefully before attempting to place this instrument in service.
Please keep this instruction manual available for reference.
INSTRUCTION MANUAL
Specifications
200(W)X255(D)mm
3.8kg
133mm
282mm
Stereo head spec.
Pupil distance range
Post height
Table dimensions
Weight
10X/20X
1X/2X selection format Objectives
Eyepieces
Focusing
Identification of parts and contents
Table
Lens filter
with adapt ring
Post
Clip
Holder
set knob
Focus knob
Stage
Head set screw
Eyepieces with eyesight adjustment
Holder
Head
Eye cup (short)
Sight adjust ring
Accessories
ESD rubber mat
4 pairs of
hook and loop
fasteners
Dust sheet
Eye cups
(long)
Ground cord
Insulation cover
for alligator clip

２
These symbols are used throughout the instruction manual to alert the user to potential
safety hazards as follows :
Warning …Notice when incorrect handling could cause the user's death or serious
injury.
Caution …Notice when incorrect handling could cause injury to the user or material
damage.
Even if the instructions do not have Caution mark, there are some possibilities for a
serious situation. Follow the instructions.
Warning and caution symbols
Precautions
1. To prevent the unit from falling and possibly causing injury to personnel, do not
place this unit on unstable places, on tables with casters.
2. Do not unnecessarily remove the stereo head or the holder from the post or the
holder. If it becomes necessary to remove them, hold them with both hands to
prevent dropping them and possibly causing injury to personnel.
 Warning
1. Do not disassemble or modify the L-51 yourself, otherwise this could cause a
malfunction.
2. Always keep the lens filter in place to prevent dust or fumes from contaminating the
interior of the microscope.
3. When using the rubber mat, be sure to ground, otherwise this could damage the
object such as PCB.
4. Protect the unit against physical shock or vibration during transport. Otherwise, this
could cause a malfunction.
5. Do not expose the unit to prolonged direct sunlight, high temperature, high humidity,
or dust. Such exposure could cause a malfunction.
 Caution
Preparation
Settle the table accompanied by the post and the holder
on an appropriate place.
Put on the stage. Orient it pressing the spring at the end
of the hole as shown in the photo.
Choose black and white faces of the stage in accord-
ance with object to be inspected.
１
First, make sure that the contents are complete.
Procedures in case of not using the ESD rubber mat

３
Preparation
２
Remove the cap from the objectives
and attach the lens filter accompa-
nied by the adapt ring.
４
Mount the holder at the low end on the
post.
Turn toward the front, then securely
tighten the holder set knob.
３
Mount the head.
Turn toward the front and secure the
head set screw into any female
screws, right, left or front.
Remove the caps from the barrels.
Then, insert the eyepieces into the
barrels.
５
Please use eyecups (long) if necessary.
< How to attach the eyecup (long) >
1. Remove the eyecup (short) .
2. Attach the eyecup (long) as sown
in the illustration.
Choose to suit
Eyecup (short)
・for persons in spectacles
Eyecup (long)
・for persons in contact lenses or without spectacles
Bringing inspector’s cheekbones at eyecups (long) stables his/her eye
points.
・for blocking the slanting rays
Engage the
projection with
the groove.
Eyepiece
Eyecup (long)
Eyepiece
Eyecup (short)
Holder set knob
Lens filter with
adapt ring
Objectives
Head set screw

Hook and loop
fasteners
Attach the hook and loop fasteners to the
top of the table and the black side of the
rubber mat so that they can stick
together.
１
Loosen the holder set knob and remove
the holder. Then, remove the clips.
Finally, insert the rubber mat through the
post with the green side up.
３
ESD rubber mat
Table
Clips
４
４
Preparation
Procedures in case of using the ESD rubber mat
The provided rubber mat is a static controlled ESD rubber mat. Use it with
grounding when inspecting electronic components which are sensitive to static
electricity. Refer to page 8 regarding ESD measures.
Mount the holder on the post.
After this procedure, refer to 2-5of
“Procedures in case of not using the ESD
rubber mat” on pages 3.
５
２
Settle the table accompanied by the post
and the holder on an appropriate place.
Also the stage should be set on the
table.
Grounding
Ground cord
Insert the alligator clip into the insulation
cover for protection of electric shock.
Then, attach the socket of the ground cord
to the stud of the rubber mat behind the
post. Finally, connect the insulated*
alligator clip to the ground.
*Cut the cover to the proper length as
needed.

１ Be agreed “0” of the graduation with each setting dot,
refer to the photo, of both the eyepieces.
Keep this setting since the right and left eyesight will be
adjusted at the main unit side (refer to 6of page 6).
Operation
Setting dot
５
５ Adjust for proper focus with the focus
knob while looking with both eyes.
If the focus knob does not focus
enough, move the holder up and
down under loosening the holder set
knob. Holder set knob
Focus knob
Loosen the holder set knob while supporting the holder with one hand when move it
up and down. Otherwise, the holder could fall down suddenly damaging the unit, the
object and the operator.
 Caution
Adapt the eyepiece distance with your pupil distance to
view a single circle of the field.
The stereo barrels will rotate drawing arcs interlocking
with (refer to the photo).
３
Place an object just under the objectives.
Prepare lighting apparatus such as Hozan’s L-711 LED
LIGHT (refer to page 7) if necessary.
４
Always aim the same point if the sur-
face of the object is not simply flat,
otherwise the working distance* could
differ from before and this could not
come into focus.
*Working distance means the dimen-
sion from the top of lens filter to the
object.
２ Rotate both the sight adjust rings so that
the silvery setting lines are barely visible. Sight adjust ring
Setting line

９ Store the L-51 putting the dust sheet and such on after use.
６
Adjusting the tightness of the focus knob
The tightness of the focus knob for vertical movement can be adjusted.
Turn the right focus knob counterclockwise while holding the left focus knob securely
to decrease the tightness, or turn it clockwise to increase the tightness.
*Do not loosen unnecessarily, otherwise the stereo head could suddenly slide
down.
Operation
The section of a long object and such can be inspected
through the hole from which the stage has been detached.
Inspecting a long object
Transfer
Hold the table by one hand and the post by the other hand tightly when transfer the L-51.
Carefully work not to throw the table down.
 Caution
Choose magnification among 1X and 2X.
The working magnification is indicated by
the stamp, carved on the objective barrel,
which comes the front.
The objective barrel rotates only 90°
between these 1X and 2X.
８
Front
６ If the image is out of focus, it is due to the difference of
right and left eyesight.
First, turn the sight adjust ring for proper focus by looking
with the dominant eye while closing the other eye.
Then, adjust the other eyepiece similarly.
Treat procedures 4to 5and check if the image is in focus.
Repeat these procedures so that a clear image can be obtained whenever the zoom
magnification is changed.
７
Proceed to procedure 8if the image looking with both eyes is in focus.
If the image is still not in focus, adjust each eyepiece again.

７
Optional accessories
Use only the following optional accessories.
L-57-0.5 Conversion lens (0.5X), L-57-1.5 Conversion lens (1.5X) and L-57-2.0
Conversion lens (2X) are available. To install, first remove the lens filter, then
replace the conversion lens and lens filter. Do not remove the adapt ring.
The magnification, filed of view and working distance gotten when combining eyepieces,
objectives and conversion lenses are follows.
Option lenses
L-546-10 Eyepieces (10X), standard
L-546-20 Eyepieces (20X)
A pair per pack
With eyecups (long & short)
* Eyecups (short) are attached when ship.
●
●
L-546-10 L-546-20
Magnification table
1X 2X
5 40 10 20
L-57-0.5
1X 2X
10 20
84
20 10
84
1X 2X
15 30 6.67
163 163 38 38
L-57-1.5
L-546-10
(WF10X)
Eyepiece
Objective 1X 2X
20 10 40 5
10 20 20 10 20 10 40 5 30 6.67 60 3.33
L-546-20
(WF20X) 40 5 80 2.5
27 27
L-57-2
Field of view
mm φ
X
mm
Field of view
mm φ
X
mm
Field of view
mm φ
X
mm
Field of view
mm φ
X
mm
Field of view
mm φ
X
mm
Field of view
mm φ
X
mm
Field of view
mm φ
X
mm
Field of view
mm φ
X
mm
Standard item
*The “working distance” is the distance from the end of the filter to the subject.
Conversion lenses
Lighting systems
L-711 LED light
The light has few fluctuations of brightness and no flicker
at all.
Various lighting systems can be used. Please refer to our catalog or web catalog.
L-711
Photographic equipment
L-835 USB camera
Specimens under a microscope are photographed (still
and video) mounting on it through the L-845 Adapter kit.
Still images can be edited using the provided software.
Without lenses.
L-846 Lens unit
L-846-2 Adapter
Connecting the microscope and a digital camera with C
mount, images of the full field being seen actually
through the microscope are taken in high-definition.
L-835
L-846 L-846-2

1-2-12 Saiwaicho, Naniwa-ku, Osaka 556-0021, Japan
Tel : [phone] F ax : [phone]
17.11
Daily care
Lenses
＊ Alcohol is extremely flammable, so handle it with care.
Wipe away any dust gently with a soft cloth or a piece of gauze.
Clean away fingerprints or oil stains with a cloth which is lightly soaked in denatured
alcohol (such as ethyl alcohol or methyl alcohol).
●
●
Stereo head and plastic parts
Wipe with a soft, dry cloth.
Do not use any organic solvents such as thinner, alcohol or either.
When out of use for an extended period, store this unit in a dry dust-free place.
●
●
Antistatic standards
ESD-safe item requirements (Excerpted from RCJS-5-1)
【Item-specific requirements】
1×104≤Rp≤1×1010
*1
Work surfaces,
Storage shelves,
Trolleys, and Carts
Point to point resistance Rp
(Ω)
EPA ground resistance
or resistance Rg (Ω)
of groundable point
7.5×105≤Rg≤1×109
*1
*1...A resistance lower than the minimum-limit resistance is acceptable of approved by the ESD coordinator.
HOZAN’s ESD-safe products are controlled with reference to the Japanese standard (RCJS-5-
1*) which is based on the international standard (IEC61340-5-1).
Products which bear the “ “ mark are products to which the standard values (see table
below) apply. The “ESD Standard” listed on each of the product pages denote the HOZAN
standard for the product.
* Reliability Center for Electronic Components of Japan (RCJ).
“Protection of Electronic Devices from Electrostatic Phenomena-General Requirements” (RCJS-5-1)