KERN OPTICS OKO-1 User manual

OKO-1-BA-en-2111
KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
Email: [e-mail]
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating instructions
Metallurgical microscope
KERN OKO-1
OKO 178
Version 1.1
01/2021

OKO-1-BA-en-2111 2
EN
KERN OKO-1
Version 1.1 01/2021
Operating instructions
Metallurgical microscope
Table of Contents
1Before use......................................................................................3
1.1 General information ................................................................................................................. 3
1.2 Notes on the electrical system................................................................................................ 3
1.3 Storage ...................................................................................................................................... 4
1.4 Maintenance and cleaning....................................................................................................... 5
2Nomenclature ................................................................................6
3Technical data / equipment ..........................................................9
4Assembly .....................................................................................11
4.1 Incident light unit.................................................................................................................... 12
4.2 Microscope head .................................................................................................................... 12
4.3 Objective ................................................................................................................................. 12
4.4 Eyepieces ................................................................................................................................ 13
4.5 Color filter ............................................................................................................................... 13
4.6 Condenser............................................................................................................................... 13
5Operation .....................................................................................14
5.1 First steps ............................................................................................................................... 14
5.2 (Pre-) Focusing ....................................................................................................................... 15
5.3 Adjusting the eye relief.......................................................................................................... 16
5.4 Diopter compensation............................................................................................................ 16
5.5 Setting the magnification ...................................................................................................... 17
5.6 Using the eyecups.................................................................................................................. 18
5.7 Adjustment of Köhler illumination for transmitted light .................................................... 19
5.8 Adjustment of the illumination for incident light ................................................................ 22
6Lamp replacement ......................................................................23
7Fuse replacement........................................................................23
8Use of optional accessories.......................................................24
8.1 Polarization unit (transmitted light)...................................................................................... 24
8.2 Camera connection ................................................................................................................ 25
9Troubleshooting..........................................................................26
10 Service .........................................................................................28
11 Disposal .......................................................................................28
12 Further information.....................................................................28

3 OKO-1-BA-en-2111
1 Before use
1.1 General information
The packaging must be opened carefully to prevent the accessories inside from falling
to the floor and breaking.
In general, a microscope should always be handled with great care, as it is a sensitive
precision instrument. Avoiding abrupt movements during operation or transport is
therefore particularly important, especially in order not to endanger the optical
components.
Likewise, you should avoid dirt or fingerprints on the lens surfaces, as this will reduce
image clarity in most cases.
If the performance of the microscope is to be maintained, it must never be
disassembled. Components such as objective lenses and other optical elements
should therefore be left as they are found at the start of operation. Also the electrical
part at the back and at the bottom of the instrument must not be tampered with without
further ado, because here there is the additional danger of triggering an electric shock.
1.2 Notes on the electrical system
Before connecting to a power supply, be sure to use the correct input voltage. The
power cord selection guide is located on the back of the unit, just above the power
jack. Failure to follow these instructions may result in fire or other damage to the unit.
Also, the main power switch should be turned off before connecting the power cord.
This will prevent an electric shock from occurring.
If you use an extension cord, the power cord you use must be grounded.
If the original fuse blows, replace it only with a suitable fuse. Suitable replacement
fuses are included in the scope of delivery.
All handling of the equipment that involves contact with the electrical system, such as
changing lamps or fuses, may only be carried out when the power supply is
disconnected.

OKO-1-BA-en-2111 4
1.3 Storage
Avoid exposing the device to direct sunlight, high or low temperatures, shock, dust and
high humidity.
The suitable temperature range is 0 - 40° C and a relative humidity of 85 % should not
be exceeded.
The device should always be placed on a firm, smooth and horizontal surface.
When the microscope is not in use, it is best to cover it with the dust cover provided.
The power supply should be switched off at the main switch and the power cord
removed. When storing the eyepieces separately, it is essential to attach the protective
caps to the tube sockets. Dust or dirt inside the optics of a microscope can in many
cases cause irreversible malfunctions or damage.
Accessories consisting of optical elements, such as eyepieces and objectives, are
preferably stored in a drying box with desiccant.

5 OKO-1-BA-en-2111
1.4 Maintenance and cleaning
In any case, the device must be kept clean and regularly cleaned of dust.
Before wiping down the unit when wet, make sure that the power is turned off.
Glass components should preferably be wiped lightly with a lint-free cloth when
contaminated.
To wipe off oil stains or fingerprints from lens surfaces, the lint-free cloth is moistened
with a mixture of ether and alcohol (ratio 70 / 30) and then used for cleaning.
Ether and alcohol must always be handled with care as they are highly flammable
substances. Therefore, it is essential to keep them away from open flames and
electrical appliances, which are switched on and off, and use only in well-ventilated
rooms.
However, organic solutions of this type should not be used to clean other components
of the device. This could result in changes to the paintwork. It is sufficient to use a
neutral cleaning agent for this purpose.
Other cleaning agents for the optical components include:
•Special cleaner for optical lenses
•Special optical cleaning cloths
•Bellows
•Brush
With proper handling and regular inspection, the microscope will operate smoothly for
many years.
However, if a repair is necessary, contact your KERN dealer or our Technical Service.

OKO-1-BA-en-2111 6
2 Nomenclature
Eyepieces
Camera adapter
connector
Microscope head / tube
Locking screw/
Microscope head
LED incident
light unit
Dial X - Y axis
Object table
Dimmer
Coarse and
fine drive
Locking screw
Condenser
Field lens with
field diaphragm
Centering screw
Condenser
Condenser with
aperture adjustment
Object table
Object holder
Lens
Objective
nosepiece

7 OKO-1-BA-en-2111
Rear view
Carrying
handle
Coarse and fine
drive
Main switch
Mains
connection
Fuse
LED incident light
unit
Power cable
for incident

OKO-1-BA-en-2111 8
Incident light unit
Insertion for diffuser
Luminous field
diaphragm
Lamp housing
Colour filter
Polariser
Analyser
Aperture diaphragm

9 OKO-1-BA-en-2111
3 Technical data / equipment
Dimensions Product:
550x200x460 mm
Dimensions Packing:
520x470x430 mm
Net weight:
12 kg
Gross weight:
16 kg
Input voltage:
AC 100-240V, 50-60Hz
Output voltage:
DC 1.2-6V
Fuse:
2A 5x20mm