KERN OSF-4 User Instructions

KERN & Sohn GmbH

Ziegelei 1
D-72336 Balingen
E-mail: [e-mail]

Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com

User instructions
Stereo microscope

KERN OSF-4

OSF 430, OSF 431, OSF 434, OSF 435

Version 1.0
01/2015

OSF-4-BA-e-1510

GB

KERN OSF-4

Version 1.0 01/2015

User instructions
Stereo microscope

Table of contents

1 Before 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

2 Nomenclature ............................................................................... 6

3 Basic data ..................................................................................... 8

4 Assembly ...................................................................................... 9

5 Operation and functionality ....................................................... 11

5.1 Getting started ........................................................................................................................ 11

5.2 Adjusting the interpupillary distance ................................................................................... 11

5.3 Adjusting the magnification .................................................................................................. 11

5.4 Dioptre adjustment and focussing ....................................................................................... 12

5.5 Adjusting the stand ................................................................................................................ 13

5.6 Using eye cups / High Eye Point eyepieces ........................................................................ 14

5.7 Lighting control ...................................................................................................................... 15

5.8 Using external illumination units .......................................................................................... 15

5.9 Changing the bulb .................................................................................................................. 16

6 Optical data ................................................................................ 16

7 Features ...................................................................................... 16

8 Trouble shooting ........................................................................ 17

9 Service ........................................................................................ 18

10 Disposal ...................................................................................... 18

11 Further information .................................................................... 18

OSF-4-BA-e-1510 2

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 in the base 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 mains cable supplied has an external power supply.
The necessary values are shown on this power supply. If you do not comply with
these specifications, then fires or other damage to the device could occur.

The lighting switches 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, 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.

OSF-4-BA-e-1510 4

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.

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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