Haag-Streit BX 900 Instructions For Use Manual - page 11
11
DEUTSCH
ENGLISH
FRANÇAIS
ITALIANO
ESPAÑOL
NEDERLANDS
PORTUGUÊS
SVENSKA
DEUTSCH
ENGLISH
FRANÇAIS
ITALIANO
ESPAÑOL
NEDERLANDS
PORTUGUÊS
SVENSKA
© HAAG-STREIT AG, 3098 Koeniz, Switzerland – HS Doc. No. 1500.7220449.04050 – 2015 – 06
5
Operation
5.1 Setting the eyepieces
NOTE!
Theeyepiecesmustbeindividuallysetpriortothefirstexaminationin
accordance with the refraction of the examiner. Insert the provided fo-
custestrod(66)inplaceoftheprotectivecover(67)andturnitsblack
projection surface at a right angle to the microscope axis. Return the
illuminationandmicroscopetothecentralposition(0°).
Insert the 12.5x eyepiece with double crosshair into the right eyepiece mounting in
the binocular tube. The depth of the double crosshair on the reticle corresponds to
thefilm/chiplevel.Thesettingisperformedfromthe(+)sideatlowmagnification
until the double crosshair appears sharp.
66. Test rod
67. Protective cover
68. Sliding occluders
66
67
68
•
Each eyepiece should be set individually by turning the knurled ocular refraction
ring with dioptre scale until the projected slit can be seen in focus. The setting is
performedfromthe(+)tothe(-)sideatlowmagnification.
•
Theslidingoccluders(68)areusedtosetthecorrectworkingdistancefortheex-
aminer from the eyepiece.
•
Examiners who do not wear glasses: Pull the occluders out as far as they will go.
•
Examiners who do wear glasses: Push the occluders in as far as they will go.
5.2 Preparing the patient
•
In order to attain a solid basis for the forehead and chin to rest on, the table height
should be selected such that the patient sits bent over forward.
•
To ensure that only the part of the eye being examined is illuminated, the slit
height should be set accordingly in order to avoid objectionable radiation.
•
The lamp must be switched off after every examination.
5.3 Operating the instrument
WARNING!
The device must be switched off after every use. Otherwise there is a
risk of overheating when a protective dust cover is employed.
NOTE!
Head rest See separate instructions for use.
•
Use the turn screw to set the chin rest in such a way that the patient’s eyes are at
the same height as the black mark on the sides of the head rest.
•
Adjusttheeyepieces(41)inaccordancewiththeexaminer’srefractionbyturning
the knurled rings and set the eye distance.
•
Switch on the illumination by pressing the switch on the power supply.
•
Regulating the brightness of the slit illumination / multi-level mains switch on pow-
ersupply/10%greyfilter(Sect.3.4).
•
Adjusttheheightoftheslitlampbyturningthecontrollever(27)untilthelumi-
nous aigrette is at eye level.
•
Themagnificationofthestereomicroscopeischangedusingtherotaryknobon
themagnificationchanger(5).
•
Therigidlyheldcontrollever(27)gentlyinclinedtowardstheexaminercanbe
used to push the entire device until the slit appears approximately focused on the
cornea.Thisinitialsettingisverifiedwiththenakedeye.Finetuningisperformed
bytiltingthecontrolleverwhileobservingviathestereomicroscope(18).
•
Theslitwidthissetleftorrightwiththerotatingknob(11),asistheanglebetween
the stereo microscope and illumination.
•
Theslitimagecanbesetvertically,horizontallyorasdiagonalasrequiredby
turningtheilluminationfacilityonthehandle(15)(lockingpointsat45°,90°and
135°;stopsat0°and180°;scalein5°increments).
•
To ensure that unimpeded binocular fundus examination is also possible at lateral
angles of between 3° and 10°, a short mirror is used, the illumination turned 90°
usingthelockingscrew(15)andtiltedin5°stepsusingthelatch(23),andtheillu-
minationandmicroscopeturnedtothecentralposition(0°).
•
Front-lens glasses and contact glasses are used to examine the ocular fundus.
Diffused illumination:
•
Connectingthediffusorupstreamcreatesdiffusedillumination(14).Thisallows
monitoring of the overview and can be used to capture the overview.
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