Care And Maintenance - Levenhuk 2ST Bedienungsanleitung

Preparations
Place a specimen in the center of a blank slide, put the slide on the stage and lock it in place
with stage clips.
Eyecups
For additional comfort during observations you can use rubber eyecups on both eyepieces.
Focusing, diopter adjustment, interpupillary distance
Place a slide on the stage and lock it in place with stage clips. Loosen the locking knob on the
microscope pole and slide the head up or down into a desired position and retighten the locking
knob. Look through the right eyepiece and turn the objective lens handle until you see the
specimen in your field of view. Afterwards, turn the focus knob until the image is sharp and clear.
Look through the left eyepiece and rotate the diopter adjustment ring until the image is sharp
and clear. Do not adjust focus during diopter adjustment! Upon completing this process, look
through both eyepieces, hold them with your hands and bring them closer or move them apart
until a double image turns into a single image.
Changing objective lenses
Levenhuk 3ST has a revolving nosepiece with two objective lenses. To switch between them you
have to rotate the nosepiece.
Changing halogen lamps and fuses
CAUTION: Before changing a lamp or a fuse make sure the microscope is unplugged from a power
source. Also, wait until the lamp cools down.
Changing the upper illumination source lamp
Loosen the locking screw on the upper illumination source housing and remove the light socket
from within. Replace the old lamp with a new one and put the light socket back. Retighten the
locking screw.
Changing the lower illumination source lamp
Loosen the locking screw on the stage and remove the glass. Remove the old lamp from the light
socket and replace it with a new one. Put the glass back in its place and retighten the locking
screw.
Changing the fuse
Fuse box is located on the bottom of the microscope base. Remove the cover and replace the old
fuse with a new one.

Care and maintenance

After unpacking your microscope and before using it for the first time check for integrity and
durability of every component and connection.
Do not touch the optical surfaces with your fingers. You can use a soft napkin or a cleaning
wipe, dipped in ether or absolute alcohol, to clean lenses. We recommend using special optics
cleaning fluids from Levenhuk. Do not use any corrosive or acetone-based fluids to clean the
optics.