Levenhuk 870T Biological Trinocular Microscope: Care and maintenance

Problems with

electric

parts:

Poor

quality

of

views

: 

reduced

contrast

, 

blurred

details

, 

etc

. 

Using immersion oil with low refractive index

Use the required immersion oil with high refractive 

indices

Prism surface is dirty

Clean the prism

Iris diaphragm diameter is too wide or too small

Adjust the diameter

Condenser lens is too low

Raise the condenser lens

One side of the field of 

view is darker than the 

other

Condenser lens is placed incorrectly or is inclined.

Adjust the condenser lens

The objective lens is not aligned to the optical axis

Rotate the revolving nosepiece until the objective 

lens locks in place

The view is constantly 

shifting during 

observations

The slide is not locked on the stage

The objective lens is not aligned to the optical axis

The objective lens is not aligned to the optical axis

Rotate the revolving nosepiece until the objective 

lens locks in place

The observed image is 

yellow

A blue filter is not used

Use the blue filter

Condenser lens is too low

Iris diaphragm diameter is too low

Adjust the diameter

Condenser lens is too low

Raise the condenser lens

The optics of the objective lens is dirty

Clean the objective lens

Problem

Possible cause

Solution

Illumination does not 

work, even though it is 

turned on

Power cable has disconnected

Check the power cable

The lamp is not installed

Install the lamp

The fuse is blown

Replace the lamp or the fuse

Lamps burn out quickly

Incorrect lamp is being used

Use the standard lamp

Lamp voltage is too high

Lamp voltage is too high

The illumination is too 

dim

Incorrect lamp is being used

Use the standard lamp

The power source voltage is too low

Lamp voltage is too high

The lamp keeps blinking, 

brightness keeps changing

Electrical surges

Adjust the power source

The filament is about to burn out

Change the lamp

Power cable has disconnected

Check the power cable

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.

Levenhuk D870

Т

 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.

Digital camera Принцип работы Принцип работы

Camera model

Max. Resolution (for still images)

Megapixels

Sensor

Dimensions (cylined unit maximum diameter)

Pixel size

Sensitivity, V/lux.sec@550 nm

Mounting location

C800

 NG

3264x2448

8.0

1/2.2° CMOS

50 mm (1.97 ")

1.67

μ

m x 1.67

μ

m

0.31

Eyepiece tube (replaces the eyepiece)