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INDEX:
INTRODUCTION TO OPERATING INSTRUCTIONS
The microscope is composed of several sub-assemblies including:
- The power control unit houses the power switch,
knobs to control light intensity and the speed of the X-Y, Zoom and Focus
controls, buttons to move the column up and down, and buttons to center
the X-Y and Focus.
- The foot switches control zoom, focus,
and X-Y movement.
- The heavy duty H-base houses the casters and
stabilizing locks.
- The Vertical Column moves up or down.
- The Horizontal Arm assembly houses the power control unit and fuses.
- The Swivel Arm assembly holds
the fiber optics.
- The fiber optic lighting provides optimal
illumination.
- The X-Y Translation Arm gives 4"
x 12" of planar movement.
- The Head Assembly houses the two
microscope binocular bodies.
- The video and camera systems allow for documentation
and easy viewing by an audience.
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POWER CONTROL PANEL
- X-Y Speed Control Knob
- X-Y Center Button
- X-Y Orientation Selector
- Zoom Speed Control Knob
- Focus Center Button
- Focus Speed Control Knob
- Column Up and Down Buttons
- Power Switch with Indicator Light
- Light Intensity Control Knob
- The controls on the top row are for the X-Y Translation Arm. This arm moves the
microscope eyepieces in a plane over the work area. The X-Y Speed knob is at the top left corner of the power control panel. It controls
the responsiveness of the foot switch joystick. "0" is the slowest
setting used for very fine adjustments. "5" is the fastest setting
for quick response. This is a continuous control and can be set anywhere,
not just on the numbered positions.
- Pushing the X-Y Center green button at
the top center of the panel will move the scope heads to the centered position
to reset the reference point and have the maximum range of motion. The
button lights when the travel is centered.
- The X-Y Orientation Selector switch at
the top right assures that X-Y control inputs deliver reasonable head movements
at various head positions.
- If the blue Praeger handle on the head carrier is pointed to the "L
Selector" position on the X-Y Translation Arm, set the X-Y Orientation
Selector switch to "L." Then the controls operate intuitively:
left moves left, right moves right, up moves away and down moves toward.
- If the blue Praeger handle is pointed toward the "R Selector"
position on the X-Y translation arm and the X-Y Orientation Selector is
set to "R," the foot switch still functions intuitively.
- When the blue handle is set to "N Selector," set the X-Y
Orientation Selector to "N" for proper functioning.
- If the X-Y Orientation Selector setting is different than the position
of the Praeger handle, the controls will behave weirdly - pushing the joystick
left moves the microscope right or away instead of left.
- The Zoom Speed knob is on the left side
of the center row. This potentiometer sets the responsiveness of the Zoom
controls on the foot switches. "0" is the slowest setting used
for very fine adjustments, and "5" is the fastest setting for
quick response. This is a continuous control and can be set anywhere, not
just on the numbered positions.
- The Focus controls are on the middle row of
the power control panel. Pushing the green Focus Center button moves
the focus body to the center of its travel. The button lights when the
focus is in the centered position.
- The Focus Speed control knob sets the
responsiveness of the Focus controls on the foot switch. "0"
is the slowest setting used for very fine adjustments. "5" is
the fastest setting for quick response. This is a continuous control and
can be set anywhere, not just on the numbered positions.
- The yellow Column Up and Down buttons
move the column up and down to provide a comfortable working setup. Column
height is adjusted with the Column toggle switch on the Carrier Assembly.
- The Power Switch is in the center of
the bottom row. Up is ON (green light comes on); down is OFF. If the light
does not come on, check the power cord and fuses.
- The Light Intensity control knob is at
the lower right of the panel and controls the intensity of the fiber optic
light. "0" is the dimmest setting, and "5" is the brightest.
This is a continuous control and can be set anywhere, not just on the numbered
positions.
The fuses are in the back of this unit and are covered in the Fuse Legend section.
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FOOT SWITCHES
The foot switches control most of the motorized functions of the microscope
to free the surgeon's hands. The DZ 801 microscope has a joystick foot control
for A-side (shown on the right) and a simpler 2-point B-side Zoom foot switch
(shown on the left). An optional second joystick foot switch is available for the B-side.
- The joystick at the top of the joystick foot switch moves the
X-Y Translation Arm left, right, away and toward.
- A raised bar provides a footrest and allows heel-or-toe rocking
action for zoom and focus.
- The toe controls Focus: Pressing the left side focuses up, the
right side focuses down. The Focus Speed knob on the control panel sets
the sensitivity.
- The heel controls Zoom: Pressing the left side zooms in, the
right side zooms out. The X-Y Speed knob on the control panel sets the
sensitivity.
The B-side surgeon may adjust focus with the eyepiece Diopter
adjustments.
The cables for both the large and small foot switches may be disconnected
from the Horizontal Arm. Always move the foot switches by the handles provided, not by the foot switch cable. Use the hangers on the column for handy storage.
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H-BASE
The heavy-duty H-base houses the caster mechanism and stabilizing locks.
Step on both black buttons to lock the casters. Unlock by stepping on the
raised edge of the silver plates. Keep the casters locked unless moving
the microscope. Please refer to the Storage Instructions section for information on safely moving the microscope.
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VERTICAL COLUMN
The motorized column allows 20" of fingertip-controlled travel,
making it easy to achieve gross focus. The yellow buttons
on the power control panel move the column up and down. The toggle switch on the Carrier Arm also controls column
movement and has a blue sterilizible cover.
Two hangers provide convenient storage for
the foot switches when not in use.
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HORIZONTAL & SWIVEL ARMS
The Swivel Arm directly supports the X-Y and Head Assembly and houses
the fiber optic illumination source. The Horizontal Arm houses power control
unit. Both arms move freely to easily position the heads over the work area.
Four black knobs allow you to adjust and lock the positioning of the microscope.
Turn counter-clockwise to loosen the brake and allow free movement, turn
clockwise to tighten the brake.
- Looking at the power control panel,
the Horizontal Arm brake is the black knob on the left side. The
Horizontal Arm swivels 330° about the Vertical Column.
- The Swivel Arm brake is the black
knob located on the Horizontal Arm directly underneath the fiber optic
light source. The Swivel Arm rotates 390° about a pivot point in line
with the light source.
- The X-Y Rotation brake is the black knob
located at the end of the Swivel Arm, directly above the X-Y. The X-Y Translation
Arm pivots about its center.
- The Carrier Rotation brake is the
black knob on the Carrier Arm Coupling at the top of the Carrier Assembly,
just above the Column Toggle switch. While the Carrier Arm can be set in
any position, the Praeger handle should point to the "L," "N,"
or "R" position (with the X-Y Orientation Selector on the power
control panel set the same) for proper use of the X-Y controls.
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ILLUMINATION
The fiber optic system delivers optimal illumination, decreases reflections
and results in a bright shadow-free field.
On top of the Swivel Arm assembly is the remote halogen light source
with a plug-in lamp module. Remove this lamp module by pulling it out by
the handle. To replace, slide module into position with the handle. Do not
touch the halogen bulb since skin oils can cause the bulb to fail sooner.
See the service notes to change
the halogen bulb.
Twin fiber optic bundles pass light between the binocular bodies to illuminate
the work area. Take care to not bend or stretch the bundles which, although
flexible, contain tiny glass fibers which could easily break, reducing the
intensity of the light. If the fiber optic bundles have to be removed from
the light source unit, pull them out by grasping the metal sleeve on the
end of the bundle rather than the bundle itself.
The Light Intensity knob in the lower right corner
of the power control panel sets the brightness of the light.
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X-Y TRANSLATION ARM
Unlike pendulum movement, which tilts the microscope and can affect the
focus, Medlink USA microscopes have true X-Y single plane movement.
The foot switch positions the microscope heads within the 4" x 12"
range. To move the binocular heads:
- Loosen the Carrier Rotation brake by turning
counter-clockwise.
- Point the blue Praeger handle to the "L," "N,"
or "R" position. With the short axis pointing away from you,
"L" is with the Praeger handle to the left, "N" is
to the back, and "R" is to the right.
- Turn the Carrier Rotation brake clockwise to tighten.
- Set the X-Y Orientation Selector on the power
control panel to the same setting as the Praeger handle.
- Adjust the speed of the X-Y Translation Arm between "0" (slowest)
and "5" (fastest) with the X-Y Speed knob on the power control panel.
- Push the X-Y Center button (top green button)
on the power control unit to center the X-Y within its field of travel.
The button lights when the X-Y Translation Arm is centered.
- Move the microscope heads with the joystick foot switch. The functioning
is intuitive. Left moves left, right moves right, up moves away and down
moves towards. If the behavior is weird, check that the X-Y Orientation
Selector and the position of the Praeger handle agree.
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CARRIER ASSEMBLY
Horizontal and vertical tilt provide the surgeon with the unlimited flexibility
to use at any angle needed for executing the most complicated modern procedures.
There are three parts to the Carrier Assembly: the Carrier Arm Coupling
(which has the Carrier Rotation brake), the Carrier Arm, and the Focus Body.
- The Carrier Rotation brake is the black knob on the Carrier
Arm Coupling at the top of the Carrier assembly, just above the Column
Toggle switch. This allows rotation of the carrier. While the Carrier Arm
can be set in any position, the Praeger handle should point to the "L,"
"N," or "R" position (with the X-Y Orientation Selector
on the power control panel set the same) for proper use of the X-Y controls.
- The Column Control switch the top
part of the Carrier Arm raises or lowers the vertical height/coarse focus.
It has a sterilizible blue cover. The yellow Column Up and Down buttons
on the power control panel also set column height.
- The blue Praeger handle located on the back of the Carrier Arm
is used for gross rotation of the head and carrier on a X-Y plane. The
Praeger handle can be unscrewed and removed for sterilization. Line up
the handle with the left (L), back (N) or right (R) side of the X-Y Translation
Arm and set the X-Y Orientation Selector on the power control panel to
the same setting to allow transparent use of the foot controls.
- The Vertical Tilt knob with blue sterilizible cover is directly
underneath the Praeger handle and controls 60° of inclination.
- The 120° Horizontal Tilt knobs are located at the base of
the vertical Carrier Arm. The knob is to the left of the A-head, to the
right of the B-head. The blue covers are sterilizible.
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TWIN HEAD ASSEMBLY
Dual zoom and independently-controlled assistant fine focus allow both
users to independently choose the magnification for a wider, all inclusive
view. This feature gives both the surgeon and assistant much more versatility,
enhancing the quality of teamwork.
- Head A and B each have 140° independent rotation around
their own optical axis for comfortable viewing in various surgical angles
including opposite, side by side, 90° apart, or any other convenient
point. Rotate the A-side and the B-side binoculars for a comfortable working
position.
- Set the rubber eyecups on the high eyepoint eyepieces down for
use with glasses and up for use with out glasses. To change the position,
carefully peel up the rubber or fold it back on itself.
- The Diopter Control is on each eyepiece
just below the rubber eyecups. If you wear eyeglasses or do not need vision
correction, set the Diopter Controls to "0" on each eyepiece.
For vision corrections up to +/- 4 diopters, dial in the setting for each
eye. Turn to the right for positive adjustments, left for negative adjustments.
- The knurled ring below the Diopter Control is for removing the eyepieces.
- Carefully gather or separate the eyepieces to adjust the pupillary
distance for comfortable viewing.
- At the base of each binocular head is a black ring that shows the Zoom
(magnification) range. The current magnification level is indicated
by the white mark on the top ring. Do not twist the ring. To zoom in or
out, press the Zoom pedal on the foot switch. The Zoom Speed knob on the
power control panel sets the responsiveness of the Zoom controls for both
A-side and B-side. The A-side controls affect only the A-side zoom, the
B-side controls affect only the B-side zoom. The magnification range from
4-20 assumes the microscope has 10x eyepieces. Optional 15x and 20x eyepieces are available.
- The twin binocular assembly has a three inch fine focus track on the base of the carrier. Pushing the green Focus Center button on the
power control panel moves the assembly to the center of the track to center
the focus. Use the fine focus pedal on the foot switch to focus the microscope.
The Focus Speed knob on the power control panel sets the responsiveness
of the focus controls.
- When one microscope is in focus, the other should also be in focus.
To account for minor differences, use the Diopter controls to adjust the
focus.
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FOCUS PROCEDURE
Both surgeons can zoom in and out independently without having to refocus.
Work first with Head A:
- Set the Diopter Control on each eyepiece to
"0."
- Zoom in to the highest magnification.
- Focus the microscope until the image is sharp.
- Zoom out to the lowest magnification.
- Adjust the Diopter Control on each eyepiece individually to attain
the sharpest image.
NOTE: If the user has to wear glasses to correct an astigmatism, it is
suggested that they operate the microscope while wearing their glasses and
using the high point eyepieces. Return to the highest point of magnification
and refocus microscope if necessary.
On the DZ 801, focus Head B by adjusting the diopter register on each
of its eyepieces.
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VIDEO AND CAMERA SYSTEMS
The 35mm camera and video systems operate with independent zoom controls.
Since the system requires no beamsplitter, there is no loss of illumination
to either surgeon.
- Install the video camera on the standard c-mount between the
A and B heads.
- Below the c-mount is the iris control. Most video systems have
automatic image controls, but the reflectivity of the body and the extreme
brightness of the fiber optic lighting may be outside of the adjustment
range of the video camera. Use the iris control to adjust the video image
for good picture - not washed out, not too dark.
- The large knurled nut below the iris control is the mounting ring for
the video system.
- The black knob on a shaft is the independent video system zoom control.
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