KERN OBD 127 Version 1.0 01/2015 User instructions Compound microscopes Table of contents Before use ..................3 General notes ..........................3 Notes on the electrical system ....................3 Storage ............................4 Maintenance and cleaning ....................... 5 Nomenclature ................6 Technical data / model outfit ............8 Assembly ..................
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 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. Under no circumstances should you touch the integrated halogen bulbs or housings either during operation or directly after use.
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. OBD_127-BA-e-1510...
2 Nomenclature Lens barrel connectors Eyepiece Head with integrated digital camera Adjusting screw Head Lens revolving unit Lens Control dial X – Y axis Object holder Specimen stage Specimen stage Coarse adjustment Condenser knob Aperture Fine adjustment adjustment Condenser knob Field lens with Field diaphragm Dimmer...
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Rear view connection Carrying handle Adjusting ring torque Fine adjustment knob Main switch Coarse adjustme Fuse Mains connection Adjusting ring torque Condenser Focus dial OBD_127-BA-e-1510...
4 Assembly 4.1 Lenses The specimen stage must be in its lowest position so that the lenses can be screwed into the lens revolving unit. Screw the lenses into the lens revolving unit so that when you turn the lens revolving unit in a clockwise direction, the next lens for stronger magnification moves into position.
5 Operation 5.1 Getting started Plug the mains plug into the socket and plug the cold device plug into the device. Set the dimmer to the lowest level. Switch on the main switch. 5.2 Adjust the gap between the eyes Different users have different gaps between the eyes.
5.4 Adjust the brightness Adjust the condenser aperture Close the field diaphragm in the base either completely or almost completely. When you look in the microscope a blurred image appears in the aperture. Adjust the height of the condenser until the image from the field diaphragm appears clearly in the visual field.
5.5 Dioptre compensation and focussing For models with dioptre setting: Keep the eye on the fixed, non-adjustable lens barrel open and close the eye which is on the adjustable lens barrel. Then adjust the focus for the open eye using the fine adjustment knob.
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High Eye Point eyepieces identified by the glasses symbol When doing this make sure that the dioptre setting is not moved. We would therefore advise that you hold the dioptre compensation 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.
In general, these microscopes are maintenance-free. Service procedures should be limited to replacing bulbs, light sources and electrical fuses. Should a defect occur, please contact your dealer or KERN Service. 7.1 Changing the bulb Switch the device off and unplug it. Unscrew the cover on the rear of the device and open it up.
8 Fault finding Problem Possible causes The mains plug is not correctly plugged The bulb does not light There is no power at the socket Defective bulb Defective fuse The specified The bulb blows immediately bulb or fuse has not been used. The aperture diaphragm and/or field The visual field is dark diaphragm are not opened wide enough.
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The aperture diaphragm is not opened Blurred details wide enough Bad image The condenser is too low. The lens does not belong to this Bad contrast microscope The front lens of the lens unit is Vignetted visual field dirty An immersion object has been used without immersion oil The immersion oil contains air bubbles The recommended immersion oil has not...
The device may only be opened by trained service engineers who have been authorised by KERN. 10 Disposal The packaging is made of environmentally-friendly materials, which you can dispose of at your local recycling centre.
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