KERN OZM-98 User manual
OZM-98-BA-e-1610
KERN & Sohn GmbH
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
User instructions
Stereo microscope set
KERN OZM-98
OZM 982(UK), OZM 983(UK)
Version 1.0
01/2016
OZM-98-BA-e-1610 2
GB
KERN OZM-98
Version 1.0 01/2016
User instructions
Stereo microscope set
Table of contents
1Before use......................................................................................3
1.1 General notes............................................................................................................................ 3
1.2 Notes on the electrical system................................................................................................ 3
1.3 Storage ...................................................................................................................................... 4
1.4 Maintenance and cleaning....................................................................................................... 5
2Nomenclature................................................................................6
3Basic data......................................................................................8
4Assembly.......................................................................................9
5Operation and functionality .......................................................15
5.1 Getting started........................................................................................................................ 15
5.2 Adjust the interpupillary distance ........................................................................................ 15
5.3 Adjusting the magnification.................................................................................................. 15
5.4 Dioptre adjustment and focussing....................................................................................... 16
5.5 Adjusting the stand................................................................................................................ 17
5.6 Using eye cups / High Eye Point eyepieces ........................................................................ 18
5.7 Brightness adjustment........................................................................................................... 19
5.8 Fitting and adjusting a camera ............................................................................................. 20
5.9 Using additional accessories................................................................................................ 22
6Optical data..................................................................................23
7Trouble shooting.........................................................................23
8Service .........................................................................................24
9Disposal.......................................................................................24
10 Further information.....................................................................24
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1 Before use
1.1 General notes
You must open the packaging carefully, to make sure that none of the accessories in
the packaging fall on the floor and get broken.
In general, microscopes should always be handled carefully because they are
sensitive precision instruments. When using or transporting the microscope it is
particularly important to avoid abrupt movements, as this may damage the optical
components.
You should also avoid getting dirt or finger prints on the lens surface, because in
most cases this will reduce image clarity.
To maintain the performance of the microscope, it must never be disassembled. So
components such as lenses and other optical elements should be left as they were
before use. Also the electrical parts of the device must not be tampered with, as in
this area there is an additional risk of triggering an electric shock.
1.2 Notes on the electrical system
Before connecting to a mains power supply, you must make sure that you are using
the correct input voltage. The information to select the correct mains cable is located
on each device, on the rear of the product directly above the connection socket. You
must comply with this information. If you do not comply with these specifications, then
fires or other damage to the device could occur.
The main switch must also be switched off before the mains cable is connected. In
this way you will avoid triggering an electric shock.
If you are using an extension cable, then the mains cable you use must be earthed.
When carrying out any procedures whereby you come into contact with the electrical
system of the device, such as, for example, changing the bulb or fuse, only carry out
these procedures when the power is disconnected.
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1.3 Storage
You should ensure that the device is not exposed to direct sunlight, temperatures
which are too high or too low, vibrations, dust or a high level of humidity.
The ideal temperature range is between 0 and 40°C and a relative humidity of 85%
should not be exceeded.
The device should always be located on a rigid, smooth, horizontal surface.
For devices with pillar stands, the microscope holder must not be rotated back too
far. If you do this, there is a risk that the microscope could tip over.
When the microscope is not being used, you should fit the objective cap and cover
the microscope with the enclosed dust protective cover.
If the eyepieces are being stored separately, the protective caps must be fitted to the
tube connectors. In most cases, if dust and dirt gets inside the optical unit of a
microscope this can cause irreversible errors or damage.
The best way to store accessories which consist of optical elements, such as, for
example, eyepieces and objectives, is in a dry box with desiccant.
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1.4 Maintenance and cleaning
In any event, the device must be kept clean and dusted regularly.
If any moisture should be occur, before you wipe down the device you must ensure
that the mains power is switched off (if lighting unit is fitted).
When glass components become dirty, the best way to clean them is to wipe them
gently with a lint-free cloth.
To wipe oil stains or finger prints off the lens surface, moisten the lint free cloth with a
mixture of ether and alcohol (70 / 30 ratio) and use this to clean the lens.
You must be careful when handling ether and alcohol, as these are highly flammable
substances. You must therefore keep it away from naked flames and electrical
devices which can be switched on and off, and only use it in well-ventilated rooms.
However organic solutions of this type should not be used to clean other components
of the device. This could lead to damage to the paint finish. To do this, it is sufficient
to use a neutral cleaning product.
You could also use the following cleaning products to clean the optical components:
Special cleaner for optical lenses
Special optical cleaning cloths
Bellows
Brush
When handled correctly and checked regularly, the microscope should give many
years of efficient service.
Should repairs still be necessary, please contact your KERN dealer or our Technical
Department.
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2 Nomenclature
Using the OZM 983 as an example
(Trinocular)
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3 Basic data
Optical system
Greenough
Dimmable lighting
Yes
Magnification ratio
6,4:1
Tube
angled at 45°
Interpupillary distance
52 –76 mm
Dioptre adjustment
On both sides
Eyepiece
HSWF 10x / Ø 23mm
Field of view (mm)
Ø 32,8 –5,1
Standard configuration
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4 Assembly
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In order to ensure the incident illumination, the LED ring light needs to be attached to
the bottom of the objective housing of the microscope head. The three fastening
screws on the holder of the ring light are used for the mounting.
Therefor it is important to pay attention to the groove around the objective housing,
which is intended to be the socket for the screws.
Additional optional attachments:
You can fit a C-mount adapter to the appropriate connection point on the top
of the microscope head for trinocular devices (OZM 983). This enables you to
fit and use digital cameras (remove protective cap first) (see section 5.8).
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5 Operation and functionality
5.1 Getting started
After assembly, if the microscope is ready for use, then for devices with lighting you
must first establish a power connection using the cable supplied.
Please see section 5.7 for more details on adjusting the lighting.
If the device has a camera connection (OZM 983), then for binocular use, you must
let the trinocular toggle rod on the back of the microscope head stay slid-in.
For trinocular use (camera connection) see section 5.8.
Do not forget to remove the cap from the bottom of the objective, so that you will then
be able to see a reflection of the object being observed in the eyepiece.
All important functions which relate to the use of the devices in this document are
described in the following sections.
5.2 Adjust the interpupillary distance
Different users have different interpupillary distances. So each time a different person
uses the microscope, the gap between the two eyepieces must be re-adjusted.
While you are looking through the eyepieces, use one hand to hold the righthand or
lefthand prism housing firmly.
By rotating outwards or inwards, you can either increase or reduce the interpupillary
distance.
As soon as the lefthand and righthand visual fields exactly overlap each other, this is
the correct interpupillary distance.
5.3 Adjusting the magnification
As the KERN OZM-9 series are stereo zoom microscopes, then you adjust the
magnification using the two zoom adjustment wheels on the lefthand and righthand
side of the microscope head.
Chapter 6 “Optical data” gives information on the possible overall magnification which
the microscope can produce. It will also include the optional use of different
eyepieces and auxiliary objectives.
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5.4 Dioptre adjustment and focussing
A special feature of stereo microscopes is that they are fitted with an optical unit
which has a relatively high depth of field. In order to be able get the most benefit from
this feature, each user must synchronise the focussing mechanisms for themselves.
The steps to do this are described in the following section.
1. Place the object to be observed on the working surface under the objective.
2. Put both dioptre adjustment rings into the starting position of 0.
3. Use the zoom control dials to set the smallest possible magnification.
4. Look through the right eyepiece with the right eye and bring the object into focus
by using the focus control dials.
5. Now set the largest possible zoom factor.
6. Once again, still only looking through the right eyepiece, bring the object into
focus
7. Then set the smallest possible zoom factor again.
8. If the object then does not appear to be in focus, adjust the focus on the dioptre
adjustment ring of the right eyepiece.
9. In order to get the highest level of accuracy when adjusting the focus, you should
repeat steps 5-8.
10.Afterwards set back to the smallest possible zoom factor.
11.Then look through the left eyepiece with the left eye and use the lefthand dioptre
adjustment ring to also adjust the optimum focus of the object.
12.In this way, the object being observed will be in focus at any zoom setting.
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5.5 Adjusting the stand
All contained joints of the microscope stand can be application-orientated aligned
and fixated (see upper picture).
The pneumatic spring ensures the height adjustment of the upper part of the
microscope stand.
For varying the spring force, the adjustment screw on the middle joint of the stand
must be used. Before performing this, the upper part needs to be kept in a
completely depressed position (see lower picture).
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5.6 Using eye cups / High Eye Point eyepieces
The eye cups supplied with the microscope can basically be used at all times, as
they screen out intrusive light, which is reflected from light sources from the
environment onto the eyepiece, and the result is better image quality.
But primarily, if eyepieces with a high eye point (particularly suitable for those who
wear glasses) are used, then it may also be useful for users who don’t wear glasses,
to fit the eye cups to the eyepieces.
These special eyepieces are also called High Eye Point eyepieces. They can be
identified by the glasses symbol on the side. They are also marked in the item
description by an additional “H” (example: HSWF 10x Ø 23 mm).
When fitting the eye cups, make sure that the dioptre setting is not moved. We would
therefore advise that you hold the dioptre adjustment ring on an eyepiece with one
hand while you fit the eye cup with the other.
Before using the microscope, users who wear glasses must remove the eye cups,
which you may find on High Eye Point eyepieces.
As the eye cups are made of rubber, you must be aware that when you are using
them, they can become slightly dirty through grease residues. In order to maintain
hygiene, we would therefore recommend that you clean the eye cups regularly (e.g.
with a damp cloth).
Eye cups
High Eye Point eyepiece
(identified by the glasses symbol)
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5.7 Brightness adjustment
There is only the usage of incident illumination available when working with KERN
stereo microscope sets. Therefor a LED ring light (see picture below) is required, that
can be mounted to the bottom of the microscope head (see chapter 4 Assembly).
Provided that the power connection is established, the illumination can be switched
on by using the main switch, which is located at the housing rear of the illumination
unit.
Furthermore it is possible to adjust the light intensity. Therefor you have to use the
control knob on the side of the housing. Depending on which way you turn the knob,
the light will become lighter or darker.
Control elements for the lighting unit
This manual suits for next models
4
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