3M Littmann 4000 Manuale - Pagina 9

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completely transferred. Do not move the stethoscopes until

the

is finished rotating.

• The Model 4000 may be exposed to excessive EMI/RFI,

electromagnetic noise. Remove the source of noise.

If none of these is the cause, refer to the Littmann

Stethoscope Service and Warranty section.

Headset Positioning

The Littmann Electronic Stethoscope Model 4000 is designed to

provide a comfortable, acoustically sealed ear fit. Notice that the

eartubes are permanently set at an angle to accommodate the

typical anatomy of the ear canal. The eartips should point in a

forward direction when inserted into the ear canals.

Correct

To reduce spring tension in the

headset, hold each eartube at

the bend near the eartip and

gradually pull apart until fully

extended.

To increase spring tension,

grasp the headset with one hand

where the eartubes enter the

plastic tubing and squeeze until

the plastic tubing on one eartube

touches the other. Repeat as

necessary.

For maximum acoustic

performance, comfortable patented

3M™ Littmann® Soft-Sealing

Eartips are provided with the

stethoscope. The stethoscope

utilizes a unique design for

attaching the eartip to the eartube.

The eartips are pushed onto the end of the eartube and snapped

in place. To remove, pull firmly on the eartip.

Diaphragm Removal and Replacement

Under normal conditions, it is unnecessary to remove the rim

and diaphragm for cleaning. The diaphragm can easily be

cleaned with an alcohol wipe. If, however, it is necessary to

remove the rim and diaphragm, carefully follow instructions:

Rim Removal:

• With diaphragm side up, using

Incorrect

Cleaning of the Rim and Diaphragm:

• Separate the diaphragm from the rim, and clean with mild

Diaphragm and Rim

Reassembly:

• Once the rim and diaphragm

a thumbnail, pry the rim out of

its designated groove, and pull

towards you. If the diaphragm

does not come off along with

the rim, remove this separately.

Do not disturb the components located under the diaphragm

once it is removed.

soapy water and/or alcohol. The surface of the chestpiece

can also be wiped with alcohol. Take care not to saturate

the chestpiece. Excess liquid used in the cleaning process

can result in moisture getting into the internal components.

are completely dry, place the

rim on a firm surface. Insert the

diaphragm into the inside