HEINE OMEGA 500 Mode D'emploi page 8

HEINE OMEGA 500 operation
®
Basic Adjustments:
Switch the instrument on by means of the rotary knob (brightness control)
on the HC 50 L brightness controller. Aperture wheel (7) and filter wheel (6)
should be rotated upwards to select the large aperture with white light. Control
(11) should be in the middle position. The beam control (9) should be in the
mid-position. Slide the eyepieces into position to match your P.D. or select the
mid-position on the scale.
Setting the brightness:
If you use OMEGA 500 with LED, please adjust a slightly higher brightness
initially and reduce the brightness afterwards.
Control Locks:
The aperture and filter controls can be locked into position by means of the
lock (8) to avoid unintentional operation.
Aperture Control:
3 different aperture sizes and a diffuser aperture can be selected by means
of the aperture control (7). The choice of aperture depends mainly on the size
of the patient's pupil. The diffuser is useful for photophobic patients and the
examination of the periphery.
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All manuals and user guides at all-guides.com
Filter Control:
The filter control (6) can be used to select an interference red-free filter, a blue
or a yellow filter which can be introduced into the illumination beam.
Synchronized adjustment of Convergence and Parallax:
This feature ensures the best possible stereopsis and image quality for any
pupil size by simultaneous adjustment of the observation and illumination
beams. For a dilated pupil, move the control (11) underneath the instrument to
the large circle position. For a small pupil, move the control to the small circle
position. The control (11) can be positioned anywhere between these two
settings to select the optimum parallax and stereopsis (convergence) for any
pupil size. The illumination beam can be adjusted vertically by the control (9).
Teaching Mirror:
The optional teaching mirror can be slid onto the fixture (10) of the optics.
Changing the bulb (does not apply to OMEGA 500 LED):
Disconnect the instrument from the power source. Unscrew the control (2) so
that the optics unit (3) is free to move. Slide the bulb cover (12) upwards. Do
not pull on the cord. Swivel the optics unit (3) to enable the bulb (13) to be
pulled out of the bulbholder. Clean the glass dome of the new bulb carefully
with a soft cloth. Insert the new bulb so that the locating pin on the bulb body
fits into the guide in the bulbholder. Re-fit the bulb cover (12) into the optics
unit (3) and slide the bulb cover back down into position.
Handling HEINE OMEGA
Selecting the position of the optics overband:
The overband (4) swivels and can be fixed into the following positions by
means of the position lock (5) (upwards for the rest position, down for working
positions 1 or 2). To release the overband, press the position lock control (5)
and rotate it. Do not try to force the overband up or down. With practice a
comfortable working position can be selected and, when properly adjusted,
the optics unit will always return to the desired working position.
Fitting the headband rheostat HC 50 L:
When fitting, ensure that the guide pin (15) of the headband rheostat HC 50 L
(14) locates correctly in the opening (16) of the overband (4). Locate the
connecting cord between the power source and the headband rheostat in the
cord clip (21) at the back of the headband.
Fitting the position control:
Before fitting the position control (5) ensure that the positioning plate (19) is
swiveled upwards as far as possible. To do this, press the positioning plate
(19) and swivel it upwards simultaneously. Ensure that the optics over-band
is in the lower position and that the guide pin (20) locates in the opening
(16). Now press the position control (5) on to the guide (17) until it clicks into
placed.
Removing the headband rheostat HC 50 L and position control:
The control of the HC 50 L (14) and the position control (5) can be fitted on the
right- or left-hand side of the headband according to preference. To remove,
press the release (18) and pull the control off the headband.
Adjusting the optics:
Unscrew the control (2) so that the optics unit (3) is free to move. (The
position of this control can be reversed for left-handed operation if required).
Place the instrument on your head and adjust the height and circumference
by means of the adjusters (22) and (1) until a comfortable fit is achieved. The
rear part of the headband can be pivoted and is self-latching. Adjust the
optics to a position as close as possible to your eyes and view the light spot
at a distance of about 30 – 40 cm without accommodating. A small, pencil-
sized object should be sharply-focused (the eyepieces incorporate 2D lenses.
Spectacle wearers should examine through the "far" part of the spectacle
lens). Adjust the optics unit so that the light spot appears centered vertically
in position of the headband or to choose an alternative working position by
pressing your view and screw the adjuster knob in (2). (It may be necessary
to correct the lever (5) and swiveling the optics overband into a different
position. If the light spot needs horizontal adjustment, simply rotate the
headband slightly to the side. Adjust and fine-tune the PD setting by closing
first one then the other eye and observing an object in the middle of the light
spot while adjusting the appropriate eyepiece. Repeat until the object is in the
middle of the field of view, and a single image is obtained. Take off the instru-
ment and check that the PD is symmetrically adjusted. If not, repeat the
selection procedure as above. Correct adjustment of PD is particularly
important when examining through a small pupil. Each user should adjust
the setting to match his-own PD. Every instrument includes two plano lenses,
which can be exchanged for the 2D lenses which are fitted as standard
equipment. Always use the OMEGA 500 with plano or the 2D lenses. Make
sure that you change the plano lenses under clean conditions to avoid that
particles enter the optics.
Cleaning and disinfection
Before cleaning, disconnect from the power source. Use a suitable cloth only
to wipe the surfaces of the instrument and the ophthalmoscopy lenses. The
instrument and the loupe may be wiped clean with a damp cloth. Any cleaning
agent used must be suitable for use on plastic surfaces. An alcohol-based
surface disinfectant can be used to clean the instrument ophthalmoscopy lense.
The use of a spray disinfectant and soaking or disinfection in a machine are
med 0912 2016-06-30
First allow the instrument to cool down.
® 500 Headband