KERN OBL-14, OBL-15, OBL 145, OBL 155, OBN 132 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

Transmitted light phase contrast microscope

KERN OBL-14, OBL-15

OBL 145, OBL 155

Version 1.0
01/2016

OBL-14-15-BA-e-1610

GB

KERN OBL-14, OBL-15

Version 1.0 01/2016

User instructions
Phase contrast 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 Technical data / Features ............................................................ 8

4 Assembly .................................................................................... 10

4.1 Microscope head .................................................................................................................... 10

4.2 Objectives ............................................................................................................................... 10

4.3 Eyepieces ................................................................................................................................ 10

4.4 Colour filter ............................................................................................................................. 10

4.5 PH condenser + PH slide ....................................................................................................... 11

5 Operation .................................................................................... 11

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

5.2 (Pre-) focussing ...................................................................................................................... 12

5.3 Adjusting the interpupillary distance ................................................................................... 13

5.4 Dioptre adjustment ................................................................................................................. 13

5.5 Adjusting the magnification .................................................................................................. 14

5.6 Adjusting the Koehler illumination ....................................................................................... 15

5.7 Using eye cups ....................................................................................................................... 17

5.8 Using oil immersion objectives ............................................................................................ 18

5.9 Phase contrast unit ................................................................................................................ 19

6 Changing the bulb ..................................................................... 21

7 Changing the fuse ...................................................................... 22

8 Using optional accessories ....................................................... 22

8.1 Camera connection ................................................................................................................ 22

9 Trouble shooting ........................................................................ 23

10 Service ................................ ........................................................ 25

11 Disposal ...................................................................................... 25

12 Further information .................................................................... 25

OBL-14-15-BA-e-1610 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 on the rear and 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 information to select the correct mains cable is located
on the 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.
If the original fuse should blow, it must only be replaced by an appropriate fuse.

Suitable replacement fuses are included with the delivery.
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.

3 OBL-14-15-BA-e-1610

Under no circumstances should you touch the integrated halogen bulbs either during
operation or directly after use. These bulbs produce significant heat and therefore
there is a risk that the user could be severely burnt. So before handling the bulbs,
you must check that they have cooled down.
The microscope housing, on the other hand, is constructed so that no significant heat
radiation emanates from the device and that there is absolutely no risk of the user
burning themselves from the housing outer surfaces.

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.
When the microscope is not being used, you should cover it with the enclosed dust

protective cover. When doing this, the power supply is stopped by switching off at the
main switch and unplugging the mains cable. 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.

OBL-14-15-BA-e-1610 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.

5 OBL-14-15-BA-e-1610

2 Nomenclature

OBL-14-15-BA-e-1610 6

Rear view

Adjusting ring

Carrying
handle

Main switch

Power
connection

Coarse
knob

Fine
knob

Fuse

Condenser
Focus dial

Adjusting ring
torque

adjustment

torque

adjustment

7 OBL-14-15-BA-e-1610

3 Technical data / Features

Model

KERN

Standard configuration

Optical system

Tube

Illumination

OBL 145

Infinity

Binocular

6V / 20W Halogen (Transmitted light)

OBL 155

Infinity

Trinocular

6V / 20W Halogen (Transmitted light)

Eyepieces

WF 10x / Ø 20 mm

Objectives:

4x / PH10x / PH40x / 100x

Product dimensions:

395x200x380 mm

Packaging dimensions:

400x280x435 mm

Net weight:

6,7 kg

Gross weight:

8 kg

Input voltage:

AC 100-240V, 50-60Hz

Output voltage:

DC 1,2-6V

Fuse:

2A 5x20mm

OBL-14-15-BA-e-1610 8