Keeler Slit Lamp H Series User manual

Slit lamp
inStructionS for uSe
H Series

SLIT LAMP by KEELER www.keeler.co.uk
The information contained within this manual must not be reproduced in whole or part without the
manufacturer’s prior written approval. As part of our policy for continued product development we the
manufacturer reserve the right to make changes to specifications and other information contained in this
document without prior notice.
Copyright © Keeler Limited 2013. Published in the UK 2013.

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SLIT LAMP by KEELER
www.keeler.co.uk
contentS
Introduction 2
Symbols used in these Instructions for Use 3
and the Slit Lamp packaging
Indications for use 4
Intended use/purpose of instrument
Brief description of the instrument
Safety 5
Cleaning and disinfection instructions 7
Transport, storage and working conditions
Names of controls and components 8
Please click on the contents to go straight to your chosen section or
navigate by using the ‘Next’ and ‘Back’ buttons to the right. Clicking on
‘Home’ will bring you back to this page.
Assembly 9
Instructions for use 13
Description of filters, apertures and magnifications 15
Routine maintenance 16
Warranty 17
Specifications and electrical ratings 18
Accessories and spares 21
Contact, packaging and disposal Information 23

2SLIT LAMP by KEELER www.keeler.co.uk
1 introduction
Thank you for choosing this Keeler product.
Please read this manual carefully before using your Keeler Slit Lamp,
this will ensure the safety of the patient and ensure you get the best
performance from this precision optical device.

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SLIT LAMP by KEELER
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2 SymbolS uSed in theSe inStructionS for uSe and the Slit lamp packaging
Manufacturer’s name and address
Mandatory action sign
Follow Instructions for Use
Optical radiation hazard
Warning: Dangerous Voltage
Trip Hazard
Hot surface
General warning sign
Type B Applied Part
Non-ionizing radiation
Keep dry
Reference Number
Serial Number
Date of manufacture
The CE mark on this product indicates it has been tested to and conforms
with the provisions noted within the 93/42/EEC Medical Device Directive
This way up
Material suitable for recycling
Fragile
The symbol on the Product or on it’s Packaging and instructions indicates
it was put on the market place after August 2005 and this product shall not
be treated as Household Waste
Operating Instructions
REF
SN

4SLIT LAMP by KEELER www.keeler.co.uk
3 indicationS for uSe 5 brief deScription of the inStrument
4 intended uSe / purpoSe of inStrument
This Keeler Slit Lamp is an AC-powered slit lamp biomicroscope and is
intended for use in eye examination of the anterior eye segment, from
the cornea epithelium to the posterior capsule. It is used to aid in the
diagnosis of diseases or trauma which affects the structural properties of
the anterior eye segment.
This device is intended to be used only by suitably trained and authorised
healthcare professionals.
This Keeler Slit Lamp can either be mounted onto a custom table
top supplied by Keeler or can be mounted on a third parties table top
(refraction unit) by suitably trained technicians.
The Keeler Slit Lamp consists of 5 assemblies; Illumination Tower;
Observation System; XYZ Translation Base; Chinrest Assembly and a Table
Top with Power Supply and Accessory Drawer.
The light intensity is controlled by a variable rheostat located on the XYZ
Translation Base. There are a number of selectable filters allowing the
user to control the characteristics of the examination light.
The Keeler Slit Lamp is designed and built in conformity with EC
Directive 93/42/EEC and the ISO 9000 and ISO 13485 series of quality
standards.
The ‘CE’ (European Community) mark attests that the Keeler Slit
Lamp complies with the provisions of the EC Directive 93/42/EEC.
Classification: CE Regulation 93/42 EEC: Class I
FDA: Class II
IEC/EN Standard 60601-1: H-series - Safety Class II
Application part: Type B
Operation mode: continuous operation
Production processes, testing, start-up, maintenance, and repairs
are conducted in strict conformity with the applicable laws and
international reference standards.
The Slit Lamp is an instrument consisting of a light source that can
be focused to shine a thin sheet (slit) of light into the eye. It is used in
conjunction with a biomicroscope. The lamp facilitates an examination
of the anterior segment, or frontal structures and posterior segment,
of the human eye, which includes the eyelid, sclera, conjunctiva, iris,
natural crystalline lens, and cornea. The binocular Slit Lamp examination
provides stereoscopic magnified view of the eye structures in detail,
enabling anatomical diagnoses to be made for a variety of eye conditions.
Caution: Federal Law restricts this device to sale by or on the order of a
physician or practitioner.

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5 brief deScription of the inStrument 6 Safety
6.1 photo toxicity
Because prolonged intense light exposure can damage
the retina, the use of the device for ocular examination
should not be unnecessarily prolonged, and the
brightness setting should not exceed what is needed to
provide clear visualization of the target structures. This device should be used
with filters that eliminate UV radiation (< 400 nm) and, whenever possible,
filters that eliminate short-wavelength blue light (<420 nm).
The retinal exposure dose for a photochemical hazard is a product of the
radiance and the exposure time. If the value of radiance were reduced in half,
twice the time would be needed to reach the maximum exposure limit.
While no acute optical radiation hazards have been identified for slit lamps,
it is recommended that the intensity of light directed into the patient’s eye
be limited to the minimum level which is necessary for diagnosis. Infants,
aphakes and persons with diseased eyes will be at greater risk. The risk may
also be increased if the person being examined has had any exposure with
the same instrument or any other ophthalmic instrument using a visible light
source during the previous 24 hours. This will apply particularly if the eye has
been exposed to retinal photography.
It is well established that exposure of the eye to intense light sources for
extended periods of time poses a risk of retinal photic injury/ocular damage.
Many ophthalmic instruments illuminate the eye with intense light. The
light intensity on the Keeler Slit Lamp is continuously adjustable from
maximum to zero. In addition there is an infra red filter incorporated in
the illumination system to reduce IR light levels.
The light emitted from this instrument is potentially hazardous. The
longer the duration of exposure, the greater the risk of ocular damage.
Exposure to light from this instrument when operated at maximum
intensity will exceed the safety guideline after a period of 13 minutes
when using the ancillary 90D lens and 45 minutes when not.
Keeler Ltd shall on request, provide the user with a graph showing the
relative spectral output of the instrument

6SLIT LAMP by KEELER www.keeler.co.uk
6.2 WarningS and cautionS
Observe the following prescriptions in order to ensure safe operation of
the instrument
WARNINGS
• Neverusetheinstrumentifvisiblydamagedandperiodicallyinspectitfor
signs of damage or misuse.
• CheckyourKeelerproductforsignsoftransport/storagedamageprior
to use.
• Donotuseinthepresenceofammablegases/liquids,orinanoxygen
rich environment.
• USFederalLawrestrictsthisdevicetosalebyorontheorderofa
physician or practitioner.
• Thisdeviceisintendedtobeusedonlybysuitablytrainedandauthorised
healthcare professionals.
• Thisproductshouldnotbeimmersedinuid.
• Repairsandmodicationstotheinstrumentmustbemadeonlybythe
specialized technicians of the manufacturer’s Technical Service Centre or
by personnel trained and authorised by the manufacturer. The manufacturer
declines any and all responsibility for loss and/or damages resulting from
unauthorised repairs; furthermore, any such actions will invalidate the
warranty.
• Routepowercordssafelytoeliminateriskoftrippingordamagetouser.
• Beforeanycleaningoftheinstrumentorthebaseunitensurethepower
lead is disconnected.
• Bulbscanreachhightemperaturesinuse–allowtocoolbeforehandling.
• Donotexceedmaximumrecommendedexposuretime.
• Shouldtheinstrumentsuffershocks(forexample,shoulditaccidentally
fall), and the optical system or the illumination system are damaged it may
be necessary to return the instrument to the manufacturer for repair.
• Careshouldbetakenwhenhandlinghalogenbulbs.Halogenbulbscan
shatter if scratched or damaged.
• Afterremovalofthebulb,donottouchtheSlitLampbulbelectrical
contacts and patient simultaneously.
• Theowneroftheinstrumentisresponsiblefortrainingpersonnelinits
correct use.
• Ensuretheinstrumentorinstrumenttableisplacedonalevelandstable
surface.
• UseonlygenuineKeelerapprovedpartsandaccessoriesordevicesafety
and performance may be compromised.
• Shutdownaftereveryuse.Incasethedustcoverisused:riskofoverheating.
• Forindooruseonly(protectfrommoisture).
• Electricalequipmentcanbeaffectedbyelectromagneticinterference.Ifthis
occurswhilstusingthisequipment,switchtheunitoffandreposition.
• Donottouchaccessibleconnectorsandthepatientsimultaneously.

7
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7 cleaning and diSinfection inStructionS
Before any cleaning of the instrument or the base unit,
ensure the power lead is disconnected.
Only manual non-immersion cleaning as described should be used for
thisinstrument.Donotautoclaveorimmerseincleaninguids.Always
disconnect power supply from source before cleaning.
a Wipe the external surface with a clean absorbent, non-shedding cloth
dampened with a water / detergent solution (2% detergent by volume)
or water / isopropyl alcohol solution (70% IPA by volume). Avoid optical
surfaces.
b Ensure that excess solution does not enter the instrument.
Use caution to ensure cloth is not saturated with solution.
c Surfaces must be carefully hand-dried using a clean non-
shedding cloth.
d Safely dispose of used cleaning materials.
8 tranSport, Storage and Working conditionS
The following ambient condition limits are recommended for the Keeler
Slit Lamp, for transport and storage it is recommended that the Slit Lamp
is kept in its original manufacturers packaging.
Working environment
+10°C to +35°C
30% to 75% relative humidity
tranSport and Storage conditionS
Transport: -40°C to +70°C
Storage: -10°C to +55°C
Before use, the Slit Lamp should be allowed to adjust to
the ambient room temperature for several hours. This
is especially important when the unit has been stored or
transported in a cold environment; this can cause severe
condensation to develop on the optical elements.

8SLIT LAMP by KEELER www.keeler.co.uk
9 nameS of controlS and componentS
headreSt aSSembly
1. Fixation light cable
2. Main lamp cable (4 pin socket)
3. Forehead rest band
4. Patient’s eye height marker
5. Fixation light
6. Chinrest
7. Chinrest height adjuster
8. Patient grab handles
9. Power lead, chinrest to lamp housing
keeler Slit lamp, h SerieS
10.Lamp cover
11.Lamp cover release screws
12.Lever for grey (ND), blue, diffuser and red free filters
13.Slit length, slit rotation and aperture control
14.Scale for slit rotation
15.Illumination mirror
16.Slit offset centring knob
17.Inclination latch 5° to 20°
18.Slit width controls
19.Test bar & tonometer plate mounting hole and cover
20.Illumination arm locking knob
21.Microscope arm locking knob
22.Eyepiece assembly securing knob
23.Joystick base locking knob
24.Joystick control (X Y Z movement)
25.Illumination control rheostat
26.Axle
27.Runner covers
28.R type tonometer mounting hole
29.Yellow filter knob (up = out)
30.Lock for securing magnification body
31.Magnification change drum
32.Eyepieces–adjustableforPDand
dioptre correction
33.Breath shield securing knob
34.Main power switch
35.Power supply unit
36.Glide plate
6
25
24
23
26
27
28
29
32
35 34
36
33
30
31
7
2
4
8
1
3
5
10
12
13 14
11
15
22
16
17
18
19
20
21
9

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SLIT LAMP by KEELER
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Your Keeler Slit Lamp has been designed to fit on to an electric insulated
medical table base or on to an electric insulated and fire resistant medical
table top, e.g. a Refraction Stand or Combi Unit.
Take care when unpacking your Slit Lamp that you do not accidentally
damage or discard any of the contents.
Leave the Slit Lamp in the packing for several hours after
delivery before unpacking to reduce the risk of condensation
forming.
Keeler Slit Lamps can be fitted to most Refraction Stands / Combi
units. Keeler recommends that this be carried out by suitably trained
technicians to ensure performance and safety are not compromised.
The Refraction Stand, Combi Unit or table leg must be 60601-1
3rd edition compliant
If you are fitting or have fitted your Slit Lamp to a medical or Keeler table
leg/baseensureitissituatedonarmandleveloor.
If the table leg/base has castors ensure the following before moving it to
another location:
a) The table is at it’s lowest position
b) The power cord is removed
c) The slit lamp arm and base locking knobs are tightened
d) The Runner covers are securely located
e) The system is moved by grasping it at its lowest practical point.
10.1 table top and baSe aSSembly procedure
1Attach the Slit Lamp table top to your table leg using the M6 x 20mm
CAP head fasteners and washers. Note that the power supply and
accessory drawer should face the operator.
The security of the fitment of the table top to the table leg is
critical for patient and Slit Lamp safety
2Using the wrench provided, fit the Headrest Assembly to the tabletop
using the hex bolts and washers. The Headrest Assembly locates on the
underside of the tabletop. Take care not to over tighten the hex bolts.
3Attach the Patient Grab Handles (8) to the Headrest Assembly.
4Place the Slit Lamp base on the Runners. Ensure that the wheels are in
line with each other. Check that the guide wheels are tight.
5Fit the Runner covers to the Runners by gently sliding them inwards,
towards each other.
10 aSSembly
8Runners

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10.2 illumination toWer aSSembly procedure
1Remove the hex bolt (a) from the base of the Illumination tower, and
then place the illumination tower on the Slit Lamp base with the base
notch (b) and pin(c) aligned. Attach the tower to the base using the hex
bolt removed earlier and tighten using the wrench provided.
2 Carefullytthemicroscopebodytothearm–ensuringitispushedto
the stop. Tighten using the securing knob on the side.
3Attach the breath shield to the pin on the rear of the magnification
assembly.
10.3 cable attachment procedure
1Connect the main lamp cable from the Chinrest to the
illumination tower. Do not twist the lead on the tower
illumination system.
2Connect the power cables
a) Chinrest fixation light cable to power supply unit
b) (3 pin) cable from power supply unit to slit lamp base assembly
c) (4 pin) main lamp cable from bottom of the chinrest to the slit lamp
base assembly.
d) Ensure cables are routed to allow free movement of the XYZ base and
to be clear of the patients.
If your Slit Lamp was not supplied with a transformer (Part #3020-
P-5040, make sure that the power connection is compatible with the
specifications in this manual and is connected by a qualified technician to
an available and suitable power supply, see section 15.5 Power Supply
a
b
c
slide to stop and secure
4 pin
Cable connector
3 pin
Breath shield

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SLIT LAMP by KEELER
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3Connect the mains power to the Slit Lamp transformer using the power
lead provided.
Only a hospital grade 3-conductor electrical power supply
cable must be used. For USA and Canada: Detachable power
supply cord set, UL listed, type SJE, SJT or SJO, 3-conductor,
not smaller than 18 AWG. Plug, cable and ground lead
connection of the socket have to be in perfect condition
3 pin to 3 pin
Fixation light socket

12 SLIT LAMP by KEELER www.keeler.co.uk
APPLANATION TONOMETER ‘KEELER FIXED’ RTYPE
This instrument is for those who wish the tonometer to
remain permanently on the slit lamp.
• Mounttheplateforthetonometerontothe
microscope body using the securing screw.
• Mountthetonometermountontothe
mounting post.
• SwingtheTonometerforwardinfrontofthe
microscope for examination. A notch position
ensures exact centring of the prism with the
left objective.
• Toobtainanimageasclearandas
freeofreexesaspossible,theangle
between the illumination and the
microscope should be about 60° and
the slit diaphragm should be fully
opened.
• Whennotinusetheinstrumentis
swung around and secured in a notch
position to the right of the microscope.
10.4 fitting applanation tonometerS, t type and r typeS
KEELER APPLANATION TONOMETER TTYPE
• Positiontheguideplateinthetonometer/testbar
support hole on the slit lamp.
• LiftTonometeroutofthepackagingandassemble
it by inserting the pin on its base into one of the
two possible openings (for right or left eye) on the
horizontal guide plate above the slit lamp axis.
These positions are related to the microscope
optics and observation can be made either
through the right or the left eye-piece.
• Thetonometerwillslipeasilyontothesupport
plate; stability is assured by the locking pins.
• Toobtainanimageasclearandas
freeofreexesaspossible,theangle
between the illumination and the
microscope should be about 60° and the
slit diaphragm should be fully opened.
• WhennotinusetheTonometershould
be removed from the Slit Lamp and
placed securely back in the packaging or
a suitable location.
Right eye
Left eye

13
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11.1 Setting the binocularS
1Remove the Test Bar locating hole cover plate (19) and place the test
bar focus in the test bar location hole at the base of the microscope
arm. To access the location hole first remove the cover. The test bar
shouldbesetwiththeatprojectionfacetowardstheSlitLamp
Microscope. The illumination and the microscope should be in the zero
degrees position.
2Turn on the Slit Lamp, and set the slit to full width (18), set the
magnification to x16 (31).
3Adjust the eyepieces pupillary distance by holding both eyepiece bodies
and rotating them inwards or outwards until they are correct for your PD.
4Turn both eyepieces (32) to maximum plus (+) correction.
5Close one eye, and with the other eye look through the microscope
slowly turning the open eye eyepiece towards the minus (-) position until
the image of the test bar is in focus. Stop.
6Repeat the above process for the other eyepiece.
7Make a note of the positions of the eyepieces so that you can set them
quicklyiftheSlitLamphasbeenusedbyanotherclinician.
8 Note–youngerexaminersarerecommendedtocompensatefortheir
ability to accommodate by further adjusting the eyepieces by minus one
(-1) or minus two (-2) dioptres.
11 inStructionS for uSe
It is vital that the binoculars are optimised for the user’s optical
correction in order to obtain focused binocular images.
18
19
31
32

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11.2 preparing the patient and uSing the Slit lamp
1The patient should be as comfortable as possible and with the patient
in the chinrest adjust the chinrest height (7) so that the patient’s eyes
are level with the height marking (4) on the chinrest support.
2 Focus the eyepieces using the test bar as described earlier, and if you
have not already done so set them to your interpupillary distance by
holding both eyepiece bodies and rotating them inwards or outwards
until they are correct for your PD.
3 Switch on the illumination, making sure the rheostat (25) is set to a low
level to minimise the patient’s exposure to light hazard.
4 Rotate the joystick (24) until the light beam is at eye level.
5 Holding the joystick vertical, move the slit Lamp base towards the
patient until the slit beam appears focused on the patient’s cornea.
6 Adjust slit width (18), magnification (31), slit rotation (13) & slit angle
etc.asrequiredtoperformtheexamination.
7 Loosening slit offset centring knob (16) to allow the slit image to be
moved off centre for scleral illumination. Tightening the knob will re-
centre the slit image in the centre of the visual field of the microscope.
8 The slit image is made vertical, or given a preset angle by means of the
illumination latch (17) (notches at 5°, 10° and 15° & 20°).
9 When using the blue filter (12) the user may wish to insert the yellow
barrier filter (29). The yellow barrier filter is out when the knob is up, in
when it is down.
10 When the examination is complete, set the rheostat to a low level and
switch off the Slit Lamp.
Shut down after every use. In case the dust cover is
used: risk of overheating.
Parts of the slit lamp coming in to contact with the patient
should be cleaned in accordance with these instructions prior
to the examination. Keeler recommends the use of disposable
hygienic chinrest tissues on the Chinrest before the patients
place their chin on it.
Never use the instrument if visibly damaged and periodically
inspect it for signs of damage or misuse.
7
4
25
24
29
31
12
13
16
17
18

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Stereo microScope
Eyepieces 12.5x
Dioptric adjustment +/- 8D
PDrange  49mm–77mm
Convergent angle of
optical axis 13°
5 step magnification change
Magnification Field of view
6x 34mm
10x 22mm
16x 14mm
25x 8.5mm
40x 5.5mm
filterS
An Infra Red (IR) cut filter is permanently fitted for safety reasons
aClear
bNeutral Density
cRed Free
dDiffuser
eBlue
apertureS
Aperture diameters (mm)
toWer illumination
Tower has the facility to tilt towards the user and positively locates at each
step. 0°, 5°, 10°, 15° and 20°.
a b c d e
0.2 1 2 3 5 9 12
12 deScription of filterS, apertureS and magnificationS

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13.1 bulb replacement (6v 20W and 12v 30W SyStemS only)
• Disconnectthepowercordtothelamphousingand
remove the lamp cover on tower illumination systems
by loosening the two screws on the lamp housing.
• Carefullydisconnectthepowerleadsfromthelamp
pins by pulling off the connecting plug.
• Loosenandremovethescrewholdingthelamp
retaining clip.
• Removetheburntoutlamp.Becarefulitmaystillbehot!
• Replaceitwithanew6V20Whalogenlamp,take
care to avoid handling the lamp glass
• Replacethelampretainingclip
• Reconnectthepowerconnectionstothelamp
• Replacethelamphousingorlampcover.
13.1.1 led SyStemS
LED’s typically have a life exceeding 10,000 hours of continuous use and
therefore can be considered as a non-consumable item that will
notrequirechangingbyauser.
Whilst this is a significant life expectancy we suggest that the Slit
Lamp is always switched off between examinations to conserve
energy and LED life.
In the unlikely event of an LED failure please contact Keeler or
your local distributor for guidance on the replacement procedure.
13.2 regularly inSpect the device for damage or dirt
Routinely clean as per section 7 Cleaning Instructions.
13.3 cleaning and changing the mirror
The mirror is front surfaced to avoid ghosting of the projected
light and therefore is very delicate and will need to be replaced
when the surface deteriorates.
13 routine maintenance
The maintenance outlined below should only be
carried out once the main power cable has been
disconnected. If you have any problems that are not
covered by the procedures described below, contact
Keeler Ltd or your local supplier.
First disconnect the mains power from your Slit Lamp.
Allow the failed lamp and housing to cool down before
removing it.
When replacing the bulb do not touch the bulb contacts
and the patient simultaneously.
Bulb clip
and knob
Lift
Securing
screw
Bulb

17
SLIT LAMP by KEELER
www.keeler.co.uk
The mirror should be cleaned only with a soft clean lens cloth.
The mirror is an interference fit in its holder and can be removed by
grasping it firmly and pulling it out of its holder. Slide in the replacement
mirrortakingcaretoavoidtouchingthereectivesurface.
Caremustbetakentokeeptheobjectiveandtheeyepiecelensesclean–
use only soft clean lens cloths to clean optical surfaces.
13.4 electrical connectionS
Routinely check all electrical connections, cables and connectors. To
access the bulb connections see earlier in this section for guidance.
13.5 opticS
The optics should be wiped clean of any loose dirt or debris with a suitable
dust brush then cleaned with a soft dry lens cloth, washed linen or other
non abrasive lens cleaning material.
Thecondenserlensbeneaththeilluminationlampwillrequirecleaning;to
access this, remove the lamp as detailed earlier, clean the condenser lens
and then replace the lamp.
13.6 axle and mechanical partS
If the Slit Lamp becomes hard to move on the glide plate, the plate should
be cleaned with a lightly oiled cloth or silicon polish. The axle should be
cleaned only with dry lint free cloths.
The Keeler H-Series Slit Lamps are guaranteed for three years (3) against
faulty workmanship materials or factory assembly. Warranty is on a Return
To Base (RTB) basis at the cost of the customer and may be void if the Slit
Lamp has not been regularly serviced.
The manufacturers warranty and terms and conditions are detailed on the
Keeler UK website http://www.keeler.co.uk/terms_and_conditions.htm
The mirror, main illumination lamp and general ‘wear and tear’ are
excluded from our standard warranty.
14 Warranty = 3 yearS
The manufacturer declines any and all responsibility and
warranty coverage should the instrument be tampered with
in any manner or should routine maintenance be omitted
or performed in manners not in accordance with these
manufacturer’s instructions.
There are no user serviceable parts in this instrument. Any
servicing or repairs should only be carried out by Keeler Ltd.
or by suitably trained and authorised distributors. Service
manuals will be available to authorised Keeler service
centres and Keeler trained service personnel.

18 SLIT LAMP by KEELER www.keeler.co.uk
The Keeler Slit Lamp is a medical electrical instrument. The instrument
requiresspecialcareconcerningelectromagneticcompatibility(EMC).This
Section describes its suitability in terms of electromagnetic compatibility
of this instrument. When installing or using this instrument, please read
carefully and observe what is described here.
Portableormobile-typeradiofrequencycommunicationunitsmayhavean
adverse effect on this instrument, resulting in malfunctioning.
15.1 electromagnetic emiSSionS
Guidance and manufacturer’s declaration – electromagnetic emissions
The Keeler Slit Lamp is intended for use in the electromagnetic
environment specified below. The customer or user should assure that it
is used in such an environment.
Emissions test Compliance Electromagnetic environment - guidance
RF emissions
CISPR 11
Group 1 The Keeler Slit Lamp uses RF energy only for
its internal function. Therefore, its RF emissions
are very low and are not likely to cause any
interferenceinnearbyelectronicequipment.
RF emissions
CISPR 11
Class B The Keeler Slit lamp is suitable for use
in all establishments, including domestic
establishments and those directly connected to
the public low-voltage power supply network that
supplies buildings used for domestic purposes.
Harmonic
emissions
IEC 61000-3-2
Class A
Voltage
uctuations/
ickeremissions
IEC 61000-3-3
Complies
15.2 interference immunity
Guidance and manufacturer’s declaration – electromagnetic immunity
The Keeler Slit Lamp is intended for use in the electromagnetic
environment specified below. The customer or user should ensure that it
is used in such an environment.
Immunity test IEC 60601 Test
level Compliance level Electromagnetic environment - guidance
Electrostatic
discharge
(ESD).
IEC 6100-4-2
± 6 kV contact
± 8 kV air
± 6 kV contact
± 8 kV air
The Keeler Slit Lamp uses
RF energy only for its internal
function. Therefore, its RF
emissions are very low and are not
likely to cause any interference in
nearbyelectronicequipment.
Electrical fast
transient/burst.
IEC 61000-4-4
± 2 kV for power
supply lines
± 1 kV for power
supply lines
± 2 kV for power
supply lines
± 1 kV for power
supply lines
Mainspowerqualityshouldbe
that of a typical commercial or
hospital environment.
Surge.
IEC 61000-4-5
± 1 kV line(s) to
line(s)
± 2 kV line(s) for
input/output line(s)
± 1 kV line(s) to
line(s)
± 2 kV line(s) for
input/output line(s)
Mainspowerqualityshouldbe
that of a typical commercial or
hospital environment.
Voltage
dips, short
interruptions
and voltage
variations on
power supply
input lines.
IEC 61000-4-11
<5% UT
(> 95% dip in UT)
40% UT
(60% dip in UT) for
5 cycles
70% UT
(30% dip in UT) for
25 cycles
<5% UT
(>95% dip in UT)
for 5 s
<5% UT
(> 95% dip in UT)
40% UT
(60% dip in UT) for 5
cycles
70% UT
(30% dip in UT) for
25 cycles
<5% UT
(>95% dip in UT)
for 5 s
Mainspowerqualityshouldbe
that of a typical commercial
or hospital environment. If the
user of the Keeler Slit Lamp
requirescontinuedoperation
during power mains interruptions,
it is recommended that the
instrument be powered from an
uninterruptible power supply.
Power
frequency
(50/60 Hz)
magnetic field.
IEC 61000-4-8
3 A/m 3 A/m Powerfrequencymagnetic
fields should be at a level
characteristic of a typical location
in a typical commercial or hospital
environment.
Note: UTis the a. c. mains voltage prior to application of the test level.
15 SpecificationS and electrical ratingS