Objective Lens - Levenhuk 850B User Manual

Poor quality of views: Using immersion oil with low refractive index
reduced contrast, blurred
details, etc.
Prism surface is dirty
Iris diaphragm diameter is too wide or too small
Condenser lens is too low
One side of the field of Condenser lens is placed incorrectly or is inclined.
view is darker than the
The objective lens is not aligned to the optical axis
other
The view is constantly The slide is not locked on the stage
shifting during
The objective lens is not aligned to the optical axis
observations
The observed image is A blue filter is not used
yellow
Condenser lens is too low Iris diaphragm diameter is too low
Condenser lens is too low
The optics of the objective lens is dirty
Problems with electric parts:
Problem Possible cause
Illumination does not Power cable has disconnected
work, even though it is
The lamp is not installed
turned on
The fuse is blown
Lamps burn out quickly Incorrect lamp is being used
Lamp voltage is too high
The illumination is too Incorrect lamp is being used
dim
The power source voltage is too low
The lamp keeps blinking, Electrical surges
brightness keeps changing
The filament is about to burn out
Power cable has disconnected
Care and maintenance
Unpack the microscope with great care, make sure nothing falls on the ground;
All the optics are calibrated on the factory line, do not try to take them apart on your own;
The binocular head and the focus system are high-precision elements, and should not be taken apart. If you have any
problems with either of them, contact our local service center;
All mechanical elements have to be protected from dust; all the mechanisms should be greased regularly; all the optical
elements should be kept clean;
Store your microscope in a clean, dry place. Upon finishing your observations, replace the dust cover and unplug the
instrument from the power source.
Digital camera
Levenhuk D870Т comes with an 8 Mpx C800 NG digital camera.
The camera allows you to observe specimens in fine detail and true colors on your PC monitor and save images on the hard
drive.
The special software that comes in the kit allows you to view and edit the resulting images. Supported file formats include:
*.bmp, *.jpg,*.jpeg,*.png, *.tif, *.tiff, *.gif, *.psd, *.ico, *.emf, *.wmf, etc.
Connect the camera to your PC via a USB cable that also acts as a power cable, so you do not have to plug it into a power
source.
Compatible OS: C800 NG – Windows XP/Vista/7/8.
Camera model
Max. Resolution (for still images)
Megapixels
Sensor
Dimensions (cylined unit maximum diameter)
Pixel size
Sensitivity, V/lux.sec@550 nm
Mounting location
Use the required immersion oil with high refractive
indices
Clean the prism
Adjust the diameter
Raise the condenser lens
Adjust the condenser lens
Rotate the revolving nosepiece until the objective
lens locks in place
The objective lens is not aligned to the optical axis
Rotate the revolving nosepiece until the objective
lens locks in place
Use the blue filter
Adjust the diameter
Raise the condenser lens
Clean the objective lens
Solution
Check the power cable
Install the lamp
Replace the lamp or the fuse
Use the standard lamp
Lamp voltage is too high
Use the standard lamp
Lamp voltage is too high
Adjust the power source
Change the lamp
Check the power cable
C800 NG
3264x2448
8.0
1/2.2° CMOS
50 mm (1.97 ")
1.67μm x 1.67μm
0.31
Eyepiece tube (replaces the eyepiece)
Принцип работы
Принцип работы