Using The Condenser; Using The Iris Diaphragm; Cleaning And Maintenance - Bresser Biorit TP Bedienungsanleitung

18 Using the condenser

1
3
Illustration 6: Condenser
1 Condenser lens
3 Adjusting lever for iris diaphragm
The condenser is used to adjust the light bundling to the observed object in an optimal way. Light
bundling can be varied by moving the condenser hight adjustment.

19 Using the iris diaphragm

NOTICE
The iris diaphragm is used to increase the depth of focus.
With an open aperture more light is getting through but the depth of focus is less. With partially closed
aperture the depth of focus is higher but it is neccessary to increase the brightness of the illumination
then.
It is recommended not to close the iris diaphragm too much when working with higher magnifications.
Otherwise the image resolution will decrease.
Move the lever for the iris diaphragm to right or left to change the aperture setting.

20 Cleaning and maintenance

• Protect the device from dust and moisture!
• Avoid fingerprints and similar contamination of the optical surfaces.
• The residual moisture must be completely degraded before use.
• Disconnect the power supply by pulling the mains plug when the appliance is not in use, in case of
a longer interruption of operation and before any maintenance and cleaning work.
• Only clean the device externally using a dry cloth. Do not use cleaning solution to prevent damage
to the electronic parts.
• Do not use organic solvents (e.g. alcohol, ether, acetone, xylol or other dilutions) to clean
lacquered parts or plastic parts!
24 / 28
2
2 Condenser hight adjustment