Bresser 5101100, Instruction Manual

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18 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 an partially
closed aperture the depth of focus is higher but it is neccessary to increase the brightness of the illu-
mination then.

It is recommended not to close the iris diaphragm to 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.

19 Cleaning and maintenance

– Protect the device against dust and moisture.

– Avoid putting fingerprints and equal contaminations on any optical surfaces.

– Make sure the residual moisture is fully elliminated before use.

– Disconnect the device from the power supply by pulling the power plug when it is not used or in

case of longer interruption of operation and before starting any work on maintenance and cleaning.

– Only use a dry cloth to clean the exterior of the device. To avoid damaging the electronics, do not

use any cleaning fluid.

– Do not use organic solvents (e.g. alcohol, ether, acetone, xylol or other dilutions) to clean

lacquered parts or plastic parts!

– Disassemble optical elements (e.g. objective, eyepiece, etc) before cleaning.

– Blow away loose dust from the lens surfaces first.

– Use high quality lens cleaning towels or soft cloth and moisten it with a little bit of pure alcohol

(available in a drug store). Wipe the lens surface with it.

– Pull a dust protection cover* over the microscope and store it in a closed container at a dry and

mould-free place. Store the microscope and the accessories in the relevant containers when they
are not used for a longer time. It is recommended to store also objectives and eyepieces in closed
containers with desiccant.

(*depending on the model a dust protection cover and box can be part of the content)

NOTICE

Remember:

A well maintained microscope will keep its optical quality for years and thus maintain its value.

20 Disposal

Dispose of the packaging materials properly, according to their type, such as paper or card-
board. Contact your local waste-disposal service or environmental authority for information
on the proper disposal.

Do not dispose of electronic devices in the household garbage!

As per Directive 2002/96/EC of the European Parliament on waste electrical and electronic
equipment and its adaptation into German law, used electronic devices must be collected
separately and recycled in an environmentally friendly manner.