Operation; Getting Started; Adjust The Gap Between The Eyes (Only For Obe 112, Obe 113); Adjusting The Magnification - KERN OBE 112 User Instructions

5 Operation

5.1 Getting started

Plug the mains plug into the socket and plug the cold device plug into the device.
Switch on the main switch and use the dimmer (switch and dimmer are combined in
one rotary knob) to adjust the brightness of the bulb (at the beginning, select a low
level of brightnesss.

5.2 Adjust the gap between the eyes (only for OBE 112, OBE 113)

Different users have different gaps between the eyes. 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 right or left
lens barrel firmly. By pulling them apart or pushing them together, you can either
increase or reduce the gap between the eyes. As soon as the left and right visual
fields fully overlap each other (only one circular image is visible), this is the correct
gap between the eyes.

5.3 Adjusting the magnification

Select the lens with the lowest magnification and make sure that the lens revolving
unit is properly clicked into place.
Place the test object on the specimen stage and fix it with the object holder, if
necessary.
Use the control dial for the X-Y axis specimen stage to position the sample in the
correct place (central under the middle of the lens).
Carefully raise the specimen stage using the coarse adjustment knob, until the
slide is almost touching the lens (observe from the side). The lens must not touch the
object holder (risk of glass breakage).
Look through the eyepieces (just one eyepiece with the OBE 111 device) and use the
coarse adjustment knob to lower it slowly until the object is visible. If necessary,
adjust the brightness by adjusting the bulb (potentiometer). Avoid overexposure.
Now use the fine adjustment knob to adjust the focus. For slides with low contrast
or a small number of objects, for example individual cells, we recommend that you
use a high-contrast standard slide to help you to make the adjustment to find the
correct level.
Once you have found a point which must be observed more closely, this must be
adjusted to be in the middle of the visual field (x/y adjustment of the stage). To be
able to view the required section of the object, this section must be positioned
centrally under the lens.
9 OBE-1-BA-e-1510